Simplify return logic to avoid unnecessary variable assignment.
This issue was detected using Coccinelle and the following
semantic patch:
@@
local idexpression ret;
expression e;
@@
-ret =
+return
e;
-return ret;
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
a lot of embeded system SOC (e.g. freescale T2080) have both
PCI and USB modules. But USB module is controlled by registers directly,
it have no relationship with PCI module.
when say N here it will not build PCI related code in USB driver.
Signed-off-by: yuan linyu <Linyu.Yuan@alcatel-sbell.com.cn>
Acked-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Declare usb_gadget_ops structures as const as they are only stored in
the ops field of a usb_gadget structure. This field is of type const, so
usb_gadget_ops structures having this property can be declared const
too.
Done using Coccinelle:
@r1 disable optional_qualifier@
identifier i;
position p;
@@
static struct usb_gadget_ops i@p={...};
@ok1@
identifier r1.i;
position p;
struct isp1760_udc udc;
@@
udc.gadget.ops=&i@p
@bad@
position p!={r1.p,ok1.p};
identifier r1.i;
@@
i@p
@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
+const
struct usb_gadget_ops i;
File size before: drivers/usb/isp1760/isp1760-udc.o
text data bss dec hex filename
12434 4136 16 16586 40ca usb/isp1760/isp1760-udc.o
File size after: drivers/usb/isp1760/isp1760-udc.o
text data bss dec hex filename
12530 4048 16 16594 40d2 usb/isp1760/isp1760-udc.o
Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Use the more common logging mechanism.
Miscellanea:
o Realign multiline statements
o Coalesce format
Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove unnecessary space before open square bracket.
Signed-off-by: Sandhya Bankar <bankarsandhya512@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Convert endpoint configuration to new capabilities model.
Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Since maxpacket_limit was introduced all UDC drivers should use
usb_ep_set_maxpacket_limit() function instead of setting maxpacket value
manually. ep.maxpacket_limit contains actual maximum maxpacket value
supported by hardware which is needed by epautoconf.
Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
isp1760_ep_alloc_request allocates a structure with kzalloc without checking
for NULL and then returns a pointer to one of the structure fields. As the
field happens to be the first in the structure the caller can properly check
for NULL, but this is risky if the structure layout is changed later. Add an
explicit NULL check for the kzalloc return value
Detected with smatch static analysis:
drivers/usb/isp1760/isp1760-udc.c:816 isp1760_ep_alloc_request()
error: potential null dereference 'req'. (kzalloc returns null)
[ thanks to Laurent Pinchart for improved commit message ]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This part 2 pull request contains only the patches
which make sure everybody on linux uses the same
resume timeout value.
Signed-off-by: Felipe Balbi <balbi@ti.com>
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Merge tag 'usb-for-v4.1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-testing
Felipe writes:
usb: generic resume timeout for v4.1
This part 2 pull request contains only the patches
which make sure everybody on linux uses the same
resume timeout value.
Signed-off-by: Felipe Balbi <balbi@ti.com>
Make sure we're using the new macro, so our
resume signaling will always pass certification.
Cc: <stable@vger.kernel.org> # v3.10+
Signed-off-by: Felipe Balbi <balbi@ti.com>
Fix using the bare number to set the 'bDescriptorType' field of the Hub
Descriptor while the value is #define'd in <linux/usb/ch11.h>.
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Commit a124820de5fd ("usb: isp1760: fix possible deadlock in
isp1760_udc_irq") replaced spin_{un,}lock with spin_{un,}lock_irq{save,restore}.
However it missed an error path resulting in the smatch warning as below:
drivers/usb/isp1760/isp1760-udc.c:1230 isp1760_udc_start() warn: inconsistent returns 'irqsave:flags'.
Locked on: line 1207
Unlocked on: line 1199
This patch fixes the spin unlock in the error path in isp1760_udc_start
thereby removing the smatch warning mentioned above.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Felipe Balbi <balbi@ti.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
As per the SAF1761 data sheet[0], the DcChipID register represents
the hardware version number (0001h) and the chip ID (1582h) for the
Peripheral Controller.
However as per the ISP1761 data sheet[1], the DcChipID register
represents the hardware version number (0015h) and the chip ID (8210h)
for the Peripheral Controller.
This patch adds support for both the chip ID values.
[0] http://www.nxp.com/documents/data_sheet/SAF1761.pdf
[1] http://pdf.datasheetcatalog.com/datasheets2/74/742102_1.pdf
Cc: Felipe Balbi <balbi@ti.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
As per the SAF1761 data sheet[0], the DcChipID register represents
the hardware version number (0001h) and the chip ID (1582h) for the
Peripheral Controller.
However as per the ISP1761 data sheet[1], the DcChipID register
represents the hardware version number (0015h) and the chip ID (8210h)
for the Peripheral Controller.
This patch adds support for both the chip ID values.
[0] http://www.nxp.com/documents/data_sheet/SAF1761.pdf
[1] http://pdf.datasheetcatalog.com/datasheets2/74/742102_1.pdf
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
The IRQF_DISABLED is a NOOP and scheduled to be removed. According to
commit e58aa3d2d0 ("genirq: Run irq handlers with interrupts
disabled") running IRQ handlers with interrupts enabled can cause stack
overflows when the interrupt line of the issuing device is still active.
This patch removes using this deprecated flag and additionally removes
redundantly setting IRQF_SHARED for isp1760_udc_register().
Signed-off-by: Valentin Rothberg <Valentin.Rothberg@lip6.fr>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This is only an API consolidation and should make things more readable
it replaces var * HZ / 1000 by msecs_to_jiffies(var).
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Here's the big pull request for Gadgets and PHYs. It's
a total of 217 non-merge commits with pretty much everything
being touched.
The most important bits are a ton of new documentation for
almost all usb gadget functions, a new isp1760 UDC driver,
several improvements to the old net2280 UDC driver, and
some minor tracepoint improvements to dwc3.
Other than that, a big list of minor cleanups, smaller bugfixes
and new features all over the place.
Signed-off-by: Felipe Balbi <balbi@ti.com>
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Merge tag 'usb-for-v3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next
Felipe writes:
usb: patches for v3.20 merge window
Here's the big pull request for Gadgets and PHYs. It's
a total of 217 non-merge commits with pretty much everything
being touched.
The most important bits are a ton of new documentation for
almost all usb gadget functions, a new isp1760 UDC driver,
several improvements to the old net2280 UDC driver, and
some minor tracepoint improvements to dwc3.
Other than that, a big list of minor cleanups, smaller bugfixes
and new features all over the place.
Signed-off-by: Felipe Balbi <balbi@ti.com>
The isp1760 driver registration function returns an error if USB is
disabled. This made sense when the driver only supported host
controllers, but now that it supports peripheral controllers host
support isn't mandatory anymore.
Fix this by returning an error only when both the HCD and UDC functions
are disabled, either through the kernel configuration or at runtime.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Both isp1760_register() and isp1761_pci_probe() check whether USB is
disabled by calling usb_disabled(), and bail out with an error if it is.
One check is enough, remove the PCI-specific check.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Enable compilation of the isp1760 driver in pure host mode, pure device
mode, or dual-role mode.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Now that this is DRD, it doesn't make sense to keep it under
drivers/usb/host.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
