Apparently nobody ever remembered to add Scatter-Gather support to
ohci-hcd. This patch adds it.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
OHCI HCCA memory region is allocated from atomic DMA pool one time
during usb_add_hcd() and deallocated by usb_remove_hcd().
Do non-atomic allocation of OHCI HCCA and free some space in
coherent atomic DMA pool.
Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The PHY setup code of the TI DaVinci DA8xx OHCI controller
uses ad-hoc register access using a pointer that is meant to
be used only by the DaVinci platform implementation and that
is intentionally not exported to loadable modules. This results
in a link error on configurations that use a modular OHCI
code on this platform.
While the proper solution for this problem would be to
implement a real PHY driver shared by ohci-da8xx and musb-da8xx,
this patch for now just works around the build error by
only allowing the ohci-da8xx code to be built-in.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Suspend scenario in case of OHCI was not properly
handled in ochi_suspend()routine. Alan Stern
suggested, properly handle OHCI suspend scenario.
This does generic proper handling of suspend
scenario to all OHCI SOC.
Signed-off-by: Manjunath Goudar <csmanjuvijay@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: linux-usb@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
With the introduction of dynamic debugging it has become redundant.
Collapse it with ohci_dbg()
Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Conditional compilation for debugging is removed in favor of
dynamic debugging. To do so
1. the support for debugfs is always compiled
2. the support for the ancient print_urb debugging aid is removed
Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This reverts commit 476e4bf939.
Manjunath is no longer at Linaro, the email address bounces. Given
that, and the fact that others have reported problems with these
patches, I'm reverting them until someone from Linaro who can SUPPORT
THEM submits them.
I will no longer accept patches from linaro.com developers unless a
senior Linaro developer has signed off on them, which did not happen
with this patch set.
Reported-by: Olof Johansson <olof@lixom.net>
Cc: Manjunath Goudar <manjunath.goudar@linaro.org>
Cc: Manjunath Goudar <csmanjuvijay@gmail.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Arnd Bergmann <arnd@arndb.de>
Suspend scenario in case of OHCI was not properly
handled in ochi_suspend()routine. Alan Stern
suggested, properly handle OHCI suspend scenario.
This does generic proper handling of suspend
scenario to all OHCI SOC.
Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Signed-off-by: Manjunath Goudar <csmanjuvijay@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Check for non-NULL overrides before dereferencing since platforms may
pass in NULL overrides.
Signed-off-by: Kevin Hilman <khilman@linaro.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Separate the OHCI pxa27x/pxa3xx host controller driver from
ohci-hcd host code so that it can be built as a separate driver
module. This work is part of enabling multi-platform kernels on
ARM.
Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Signed-off-by: Deepak Saxena <dsaxena@linaro.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Separate the OHCI EP93XX host controller driver from ohci-hcd
host code so that it can be built as a separate driver module.
This work is part of enabling multi-platform kernels on ARM.
Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Signed-off-by: Deepak Saxena <dsaxena@linaro.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Separate the OHCI NXP host controller driver from ohci-hcd
host code so that it can be built as a separate driver module.
This work is part of enabling multi-platform kernels on ARM.
Many place function name and struct name started with usb,
current scenario replaced usb with ohci for proper naming.
Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Signed-off-by: Deepak Saxena <dsaxena@linaro.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Separate the Samsung OHCI S3C24xx/S3C64xx host controller driver
from ohci-hcd host code so that it can be built as a separate
driver module.This work is part of enabling multi-platform.
Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Signed-off-by: Deepak Saxena <dsaxena@linaro.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Separate the TI OHCI Atmel host controller driver from ohci-hcd
host code so that it can be built as a separate driver module.
This work is part of enabling multi-platform kernels on ARM.
Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Signed-off-by: Deepak Saxena <dsaxena@linaro.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Separate the ST OHCI SPEAr host controller driver from ohci-hcd
host code so that it can be built as a separate driver module.
This work is part of enabling multi-platform kernels on ARM.
Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Signed-off-by: Deepak Saxena <dsaxena@linaro.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Viresh Kumar <viresh.linux@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Separate the TI OHCI OMAP3 host controller driver from ohci-hcd
host code so that it can be built as a separate driver module.
This work is part of enabling multi-platform kernels on ARM.
Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Signed-off-by: Deepak Saxena <dsaxena@linaro.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Anand Gadiyar <gadiyar@ti.com>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Separate the TI OHCI OMAP1/2 host controller driver from ohci-hcd
host code so that it can be built as a separate driver module.
This work is part of enabling multi-platform kernels on ARM.
Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Signed-off-by: Deepak Saxena <dsaxena@linaro.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Separate the Samsung OHCI EXYNOS host controller driver from ohci-hcd
host code so that it can be built as a separate driver module.
This work is part of enabling multi-platform kernels on ARM.
Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Signed-off-by: Deepak Saxena <dsaxena@linaro.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Cc: Vivek Gautam <gautam.vivek@samsung.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Commit 24f531371d (USB: EHCI: accept very late isochronous URBs)
changed the isochronous API provided by ehci-hcd. URBs submitted too
late, so that the time slots for all their packets have already
expired, are no longer rejected outright. Instead the submission is
accepted, and the URB completes normally with a -EXDEV error for each
packet. This is what client drivers expect.
This patch implements the same policy in ohci-hcd. The change is more
complicated than it was in ehci-hcd, because ohci-hcd doesn't scan for
isochronous completions in the same way as ehci-hcd does. Rather, it
depends on the hardware adding completed TDs to a "done queue". Some
OHCI controller don't handle this properly when a TD's time slot has
already expired, so we have to avoid adding such TDs to the schedule
in the first place. As a result, if the URB was submitted too late
then none of its TDs will get put on the schedule, so none of them
will end up on the done queue, so the driver will never realize that
the URB should be completed.
To solve this problem, the patch adds one to urb_priv->td_cnt for such
URBs, making it larger than urb_priv->length (td_cnt already gets set
to the number of TD's that had to be skipped because their slots have
expired). Each time an URB is given back, the finish_urb() routine
looks to see if urb_priv->td_cnt for the next URB on the same endpoint
is marked in this way. If so, it gives back the next URB right away.
This should be applied to all kernels containing commit 815fa7b917
(USB: OHCI: fix logic for scheduling isochronous URBs).
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When ohci-hcd is shutting down, call ohci_usb_reset reset ohci-hcd, the
root hub generate an interrupt, but ohci->rh_state is OHCI_RH_HALTED,
and ohci_irq ignore the interrupt, the kernel trigger warning "irq
nobody cared". ehci-hcd is first disable interrupts, then reset ehci.
This patch disable ohci interrupt before reset ohci.
The patch is tested at the arm cortex-a9 demo board.
Signed-off-by: caizhiyong <caizhiyong@huawei.com>
Reviewed-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The OHCI host controller driver can be built standalone now,
without enabling any of the available bus glue drivers, so
there is not really a reason to error out here:
drivers/usb/host/ohci-hcd.c:1258: error:
#error "missing bus glue for ohci-hcd" #error "missing bus glue for ohci-hcd"
This follows the same change done in ehci recently as 843e56c0
"USB: EHCI: remove bogus #error" and hopefully avoids future
merge conflicts in this list.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch splits the ohci-platform code from ohci-hcd out
into its own separate driver module.This work is part of enabling
multi-platform kernels on ARM.
In V2:
-Passed "hcd" argument instead of "ohci" in ohci_setup() because it is
using "struct usb_hcd" argument.
In V3:
-Directly passed "hcd" argument not required to call ohci_to_hcd() function.
Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch splits the PCI portion of ohci-hcd out into its
own separate driver module, called ohci-pci.
The major point of difficulty lies in ohci-pci's many vendor- and
device-specific workarounds. Some of them have to be applied before
calling ohci_start() some after, which necessitates a fair amount of
code motion. The other platform drivers require much smaller changes.
The complete sb800_prefetch() function moved to ohci-q.c,because its
only related to ohci-pci driver.
USB_OHCI_HCD_PCI symbol no longer dependence on STB03xxx, PPC_MPC52xx and
USB_OHCI_HCD_PPC_OF that's what removed.
V2:
- few specific content of pci related code in ohci_pci_start function has been moved to ohci_pci_reset
and rest of the generic code is written in ohci_start of ohci-hcd.c file.
V3:
- ohci_restart() has been called in ohci_pci_reset() function for to reset the ohci pci.
V4:
-sb800_prefetch() moved to ohci-q.c,because its only related to ohci-pci.
-no longer _creating_ CONFIG_USB_OHCI_PCI,creating CONFIG_USB_OHCI_HCD_PCI.
-overrides renamed with pci_override,its giving proper meaning.
V5:
-sb800_prefetch() moved to pci-quirks.c,because its only related to pci.
V6:
-sb800_prefetch() function has been moved to pci-quirks.c made as separate patch in 2/3.
-Most of the generic ohci pci changes moved in 2/3 patch,now this is complete ohci-pci separation patch.
V7:
-Unrelated include file has been removed from ohci.h file.
V8:
-USB_OHCI_HCD_PCI symbol does not dependence on STB03xxx, PPC_MPC52xx and USB_OHCI_HCD_PPC_OF.
Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Note that this changes is part of separating the ohci pci host controller
driver from ohci-hcd host code.
This contains :
-Moved sb800_prefetch() function from ohci-pci.c to pci-quirks.c file
and EXPORTed, this is part of the effort to move the ohci pci related
code to generic pci code.
-Passed "device" argument instead of "ohci_hcd" in sb800_prefetch()
function to avoid extra include file in pci-quirks.c.
V2:
-Passed "device" argment instead of "pci_dev", then we use to_pci_dev()
to get the "pci_dev" structure.
Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch prepares ohci-hcd for being split up into a core
library and separate platform driver modules. A generic
ohci_hc_driver structure is created, containing all the "standard"
values, and a new mechanism is added whereby a driver module can
specify a set of overrides to those values. In addition the
ohci_restart(),ohci_suspend() and ohci_resume() routines need
to be EXPORTed for use by the drivers.
Added ohci_setip(() and ohci_start() routine for to start the generic
controller rather than each having its own idiosyncratic approach.
This allow to clean duplicated code in most of SOC driver
In V2:
-ohci_hcd_init() ohci_run() and ohci_stop() are not made non-static.
-Adds the ohci_setup() and ohci_start() routine.
In V3:
-purpose of ohci_setup() and ohci_start() function description written in the patch
description.
-ohci_init() are not made non-static but now called beginning of the ohci_restart().
-ohci_run() signature change reverted back.
-unrelated changes removed.
-duplicate comment line removed.
-inline ohci_suspend() and ohci_resume() is not needed so removed from ohci.h file.
In V4:
-ohci-init() EXPORTed because it is called by all bus glue modules.
-ohci-setup() removed from 1/2 added into 2/2 patch.
In V5:
-Again ohci_setup() is added and EXPORTed because to replace the ohci_init() from
all bus glues.
-ohci_init() is not made non-static function.
In V6:
-ohci_init() call is removed from ohci_quirk_nec_worker(), because it is already called in ohci_restart().
In V8:
-ohci_hcd_init() is called by ohci_setup() to make generic ohci initialization in all ohci drivers.
Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The isochronous scheduling logic in ohci-hcd has a bug. The
calculation for skipping TDs that are too late should be carried out
only in the !URB_ISO_ASAP case. When URB_ISO_ASAP is set, the URB is
pushed back so that none of the TDs are too late, which would cause
the calculation to overflow.
The patch also fixes the calculation to avoid overflow in the case
where the frame value wraps around.
This should be applied to -stable kernels going back to 3.8.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Commits c44b225077 (UHCI: implement new
semantics for URB_ISO_ASAP) and
6a41b4d3fe (OHCI: implement new
semantics for URB_ISO_ASAP) increased the latency for isochronous URBs
in uhci-hcd and ohci-hcd respectively to 2 milliseconds, in an
attempt to avoid underruns. It turns out that not only was this
unnecessary -- 1-ms latency works okay -- it also causes problems with
certain application loads such as real-time audio.
This patch changes the latency for both drivers back to 1 ms.
This should be applied to -stable kernels going back to 3.8.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-and-tested-by: Joe Rayhawk <jrayhawk@fairlystable.org>
CC: Clemens Ladisch <clemens@ladisch.de>
CC: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Like the EHCI driver, OHCI supports a large number of different platform
glue drivers by directly including them, which causes problems with
conflicting macro definitions in some cases. As more ARM architecture
specific back-ends are required to coexist in a single build, we should
split those out into separate drivers. Unfortunately, the infrastructure
for that is still under development, so to give us more time, this uses
a separate *_PLATFORM_DRIVER macro for each ARM specific OHCI backend,
just like we already do on PowerPC and some of the other ARM platforms.
In linux-3.10, only the SPEAr and CNS3xxx back-ends would actually conflict
without this patch, but over time we would get more of them, so this
is a way to avoid having to patch the driver every time it breaks. We
should still split out all back-ends into separate loadable modules,
but that work is only needed to improve code size and cleanliness after
this patch, not for correctness.
While we're here, this fixes the incorrectly sorted error path
for the OMAP1 and OMAP3 backends to ensure we always unregister
the exact set of drivers that were registered before erroring out.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
All users have been converted to use the OHCI platform driver instead, thus
making ohci-au1xxx obsolete, remove it.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
All users have been converted to use the OHCI platform driver instead, thus
making ohci-sh obsolete, so remove it.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
All users have been converted to use the OHCI platform driver instead, thus
making ohci-xls obsolete, remove it.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
All users have been converted to use the OHCI platform driver instead, thus
making ohci-cns3xxx, so remove it.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The users have been converted to use the platform OHCI driver instead, thus
making the ohci-pnx8550 driver obsolete, so remove it.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Merge ohci_finish_controller_resume with ohci_resume as suggested by Alan
Stern. Since ohci_finish_controller_resume no longer exists, update the
various OHCI drivers to call ohci_resume() instead. Some drivers used to set
themselves the bit HCD_FLAG_HW_ACCESSIBLE, which is now handled by
ohci_resume().
Acked-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
As suggested by Alan Stern, the code checking for the OHCI RH already
suspended is no longer required since the bug it fixes has not been seen in
ages. Remove that check making ohci_suspend much simpler.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
As suggested by Alan Stern, move the ohci-pci.c ohci_pci_{suspend,resume}
routines to ohci-hcd.c. Due to their move, also rename them to
ohci_{suspend,resume} to make it clear they operate on ohci_hcd. Since they
are not necessarily called, annotate them with __maybe_unused, and make them
enclosed within an #ifdef CONFIG_PM / #endif section.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This driver is not registered by any in-tree users, and if really needed by
some out of tree user, the same functionnality can be restored using the
ohci-platform driver using the following platform_data parameters:
big_endian_desc = 1
big_endian_mmio = 1
no_big_frame_no = 1
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch (as1614) updates the isochronous scheduling in ohci-hcd to
match the new semantics for URB_ISO_ASAP. Testing revealed a hardware
bug in the way my OHCI controller handles expired isochronous TDs;
consequently the patch tries hard to avoid creating them (unlike the
ehci-hcd and uhci-hcd drivers).
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Pull workqueue changes from Tejun Heo:
"This is workqueue updates for v3.7-rc1. A lot of activities this
round including considerable API and behavior cleanups.
* delayed_work combines a timer and a work item. The handling of the
timer part has always been a bit clunky leading to confusing
cancelation API with weird corner-case behaviors. delayed_work is
updated to use new IRQ safe timer and cancelation now works as
expected.
* Another deficiency of delayed_work was lack of the counterpart of
mod_timer() which led to cancel+queue combinations or open-coded
timer+work usages. mod_delayed_work[_on]() are added.
These two delayed_work changes make delayed_work provide interface
and behave like timer which is executed with process context.
* A work item could be executed concurrently on multiple CPUs, which
is rather unintuitive and made flush_work() behavior confusing and
half-broken under certain circumstances. This problem doesn't
exist for non-reentrant workqueues. While non-reentrancy check
isn't free, the overhead is incurred only when a work item bounces
across different CPUs and even in simulated pathological scenario
the overhead isn't too high.
All workqueues are made non-reentrant. This removes the
distinction between flush_[delayed_]work() and
flush_[delayed_]_work_sync(). The former is now as strong as the
latter and the specified work item is guaranteed to have finished
execution of any previous queueing on return.
* In addition to the various bug fixes, Lai redid and simplified CPU
hotplug handling significantly.
* Joonsoo introduced system_highpri_wq and used it during CPU
hotplug.
There are two merge commits - one to pull in IRQ safe timer from
tip/timers/core and the other to pull in CPU hotplug fixes from
wq/for-3.6-fixes as Lai's hotplug restructuring depended on them."
Fixed a number of trivial conflicts, but the more interesting conflicts
were silent ones where the deprecated interfaces had been used by new
code in the merge window, and thus didn't cause any real data conflicts.
Tejun pointed out a few of them, I fixed a couple more.
* 'for-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: (46 commits)
workqueue: remove spurious WARN_ON_ONCE(in_irq()) from try_to_grab_pending()
workqueue: use cwq_set_max_active() helper for workqueue_set_max_active()
workqueue: introduce cwq_set_max_active() helper for thaw_workqueues()
workqueue: remove @delayed from cwq_dec_nr_in_flight()
workqueue: fix possible stall on try_to_grab_pending() of a delayed work item
workqueue: use hotcpu_notifier() for workqueue_cpu_down_callback()
workqueue: use __cpuinit instead of __devinit for cpu callbacks
workqueue: rename manager_mutex to assoc_mutex
workqueue: WORKER_REBIND is no longer necessary for idle rebinding
workqueue: WORKER_REBIND is no longer necessary for busy rebinding
workqueue: reimplement idle worker rebinding
workqueue: deprecate __cancel_delayed_work()
workqueue: reimplement cancel_delayed_work() using try_to_grab_pending()
workqueue: use mod_delayed_work() instead of __cancel + queue
workqueue: use irqsafe timer for delayed_work
workqueue: clean up delayed_work initializers and add missing one
workqueue: make deferrable delayed_work initializer names consistent
workqueue: cosmetic whitespace updates for macro definitions
workqueue: deprecate system_nrt[_freezable]_wq
workqueue: deprecate flush[_delayed]_work_sync()
...
This patch removes the ARM architecture mach-pnx4008. No direct support or user
feedback since 2006. Acknowledgements from NXP/Philips and Linux arm-soc
maintainers.
Signed-off-by: Roland Stigge <stigge@antcom.de>
flush[_delayed]_work_sync() are now spurious. Mark them deprecated
and convert all users to flush[_delayed]_work().
If you're cc'd and wondering what's going on: Now all workqueues are
non-reentrant and the regular flushes guarantee that the work item is
not pending or running on any CPU on return, so there's no reason to
use the sync flushes at all and they're going away.
This patch doesn't make any functional difference.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Mattia Dongili <malattia@linux.it>
Cc: Kent Yoder <key@linux.vnet.ibm.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Karsten Keil <isdn@linux-pingi.de>
Cc: Bryan Wu <bryan.wu@canonical.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Alasdair Kergon <agk@redhat.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-wireless@vger.kernel.org
Cc: Anton Vorontsov <cbou@mail.ru>
Cc: Sangbeom Kim <sbkim73@samsung.com>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Eric Van Hensbergen <ericvh@gmail.com>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Petr Vandrovec <petr@vandrovec.name>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Avi Kivity <avi@redhat.com>
This is now replaced by the new ssb USB driver, which also supports
devices with an EHCI controller.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'split-asm_system_h-for-linus-20120328' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system
Pull "Disintegrate and delete asm/system.h" from David Howells:
"Here are a bunch of patches to disintegrate asm/system.h into a set of
separate bits to relieve the problem of circular inclusion
dependencies.
I've built all the working defconfigs from all the arches that I can
and made sure that they don't break.
The reason for these patches is that I recently encountered a circular
dependency problem that came about when I produced some patches to
optimise get_order() by rewriting it to use ilog2().
This uses bitops - and on the SH arch asm/bitops.h drags in
asm-generic/get_order.h by a circuituous route involving asm/system.h.
The main difficulty seems to be asm/system.h. It holds a number of
low level bits with no/few dependencies that are commonly used (eg.
memory barriers) and a number of bits with more dependencies that
aren't used in many places (eg. switch_to()).
These patches break asm/system.h up into the following core pieces:
(1) asm/barrier.h
Move memory barriers here. This already done for MIPS and Alpha.
(2) asm/switch_to.h
Move switch_to() and related stuff here.
(3) asm/exec.h
Move arch_align_stack() here. Other process execution related bits
could perhaps go here from asm/processor.h.
(4) asm/cmpxchg.h
Move xchg() and cmpxchg() here as they're full word atomic ops and
frequently used by atomic_xchg() and atomic_cmpxchg().
(5) asm/bug.h
Move die() and related bits.
(6) asm/auxvec.h
Move AT_VECTOR_SIZE_ARCH here.
Other arch headers are created as needed on a per-arch basis."
Fixed up some conflicts from other header file cleanups and moving code
around that has happened in the meantime, so David's testing is somewhat
weakened by that. We'll find out anything that got broken and fix it..
* tag 'split-asm_system_h-for-linus-20120328' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system: (38 commits)
Delete all instances of asm/system.h
Remove all #inclusions of asm/system.h
Add #includes needed to permit the removal of asm/system.h
Move all declarations of free_initmem() to linux/mm.h
Disintegrate asm/system.h for OpenRISC
Split arch_align_stack() out from asm-generic/system.h
Split the switch_to() wrapper out of asm-generic/system.h
Move the asm-generic/system.h xchg() implementation to asm-generic/cmpxchg.h
Create asm-generic/barrier.h
Make asm-generic/cmpxchg.h #include asm-generic/cmpxchg-local.h
Disintegrate asm/system.h for Xtensa
Disintegrate asm/system.h for Unicore32 [based on ver #3, changed by gxt]
Disintegrate asm/system.h for Tile
Disintegrate asm/system.h for Sparc
Disintegrate asm/system.h for SH
Disintegrate asm/system.h for Score
Disintegrate asm/system.h for S390
Disintegrate asm/system.h for PowerPC
Disintegrate asm/system.h for PA-RISC
Disintegrate asm/system.h for MN10300
...
Remove all #inclusions of asm/system.h preparatory to splitting and killing
it. Performed with the following command:
perl -p -i -e 's!^#\s*include\s*<asm/system[.]h>.*\n!!' `grep -Irl '^#\s*include\s*<asm/system[.]h>' *`
Signed-off-by: David Howells <dhowells@redhat.com>
Quite a bit of code gets removed, and some stuff moved around, mostly
the old samsung s3c24xx stuff. There should be no functional changes
in this series otherwise. Some cleanups have dependencies on other
arm-soc branches and will be sent in the second round.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Merge tag 'cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull "ARM: global cleanups" from Arnd Bergmann:
"Quite a bit of code gets removed, and some stuff moved around, mostly
the old samsung s3c24xx stuff. There should be no functional changes
in this series otherwise. Some cleanups have dependencies on other
arm-soc branches and will be sent in the second round.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>"
Fixed up trivial conflicts mainly due to #include's being changes on
both sides.
* tag 'cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (121 commits)
ep93xx: Remove unnecessary includes of ep93xx-regs.h
ep93xx: Move EP93XX_SYSCON defines to SoC private header
ep93xx: Move crunch code to mach-ep93xx directory
ep93xx: Make syscon access functions private to SoC
ep93xx: Configure GPIO ports in core code
ep93xx: Move peripheral defines to local SoC header
ep93xx: Convert the watchdog driver into a platform device.
ep93xx: Use ioremap for backlight driver
ep93xx: Move GPIO defines to gpio-ep93xx.h
ep93xx: Don't use system controller defines in audio drivers
ep93xx: Move PHYS_BASE defines to local SoC header file
ARM: EXYNOS: Add clock register addresses for EXYNOS4X12 bus devfreq driver
ARM: EXYNOS: add clock registers for exynos4x12-cpufreq
PM / devfreq: update the name of EXYNOS clock registers that were omitted
PM / devfreq: update the name of EXYNOS clock register
ARM: EXYNOS: change the prefix S5P_ to EXYNOS4_ for clock
ARM: EXYNOS: use static declaration on regarding clock
ARM: EXYNOS: replace clock.c for other new EXYNOS SoCs
ARM: OMAP2+: Fix build error after merge
ARM: S3C24XX: remove call to s3c24xx_setup_clocks
...
The ath79 usb driver doesn't do anything special and is now converted
to the generic ehci and ohci driver.
This was tested on a TP-Link TL-WR1043ND (AR9132)
Acked-by: Gabor Juhos <juhosg@openwrt.org>
CC: Imre Kaloz <kaloz@openwrt.org>
CC: linux-mips@linux-mips.org
CC: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
