linux/drivers/usb
Christoph Hellwig c8b09f6fb6 scsi: don't set tagging state from scsi_adjust_queue_depth
Remove the tagged argument from scsi_adjust_queue_depth, and just let it
handle the queue depth.  For most drivers those two are fairly separate,
given that most modern drivers don't care about the SCSI "tagged" status
of a command at all, and many old drivers allow queuing of multiple
untagged commands in the driver.

Instead we start out with the ->simple_tags flag set before calling
->slave_configure, which is how all drivers actually looking at
->simple_tags except for one worke anyway.  The one other case looks
broken, but I've kept the behavior as-is for now.

Except for that we only change ->simple_tags from the ->change_queue_type,
and when rejecting a tag message in a single driver, so keeping this
churn out of scsi_adjust_queue_depth is a clear win.

Now that the usage of scsi_adjust_queue_depth is more obvious we can
also remove all the trivial instances in ->slave_alloc or ->slave_configure
that just set it to the cmd_per_lun default.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
2014-11-12 11:19:43 +01:00
..
atm usb: delete non-required instances of include <linux/init.h> 2014-01-08 15:01:39 -08:00
c67x00 USB: c67x00: correct spelling mistakes in comments 2014-01-08 15:05:14 -08:00
chipidea usb: chipidea: Fix oops when removing the ci_hdrc module 2014-10-27 10:01:05 +08:00
class USB: cdc-acm: add quirk for control-line state requests 2014-11-06 12:25:40 -08:00
common usb: Add LED triggers for USB activity 2014-09-25 17:05:12 +02:00
core usb: core: notify disconnection when core detects disconnect 2014-11-03 19:29:55 -08:00
dwc2 usb: dwc2: gadget: fix enumeration issues 2014-10-28 10:40:58 -05:00
dwc3 usb: dwc3: gadget: Properly initialize LINK TRB 2014-10-23 13:57:24 -05:00
early
gadget usb: gadget: function: Fixed the return value on error path 2014-10-23 14:49:35 -05:00
host xhci: no switching back on non-ULT Haswell 2014-11-03 15:48:45 -08:00
image USB: image: correct spelling mistake in comment 2014-01-08 15:08:14 -08:00
misc usb: rename phy to usb_phy in HCD 2014-09-29 11:52:59 -04:00
mon
musb usb: musb: musb_dsps: fix NULL pointer in suspend 2014-10-23 09:55:43 -05:00
phy USB: Remove .owner field for driver 2014-09-28 21:55:10 -04:00
renesas_usbhs usb: gadget: Refactor request completion 2014-09-25 16:58:50 +02:00
serial USB: opticon: fix non-atomic allocation in write path 2014-11-03 09:07:30 +01:00
storage scsi: don't set tagging state from scsi_adjust_queue_depth 2014-11-12 11:19:43 +01:00
usbip usbip: remove struct usb_device_id table 2014-08-25 10:40:58 -07:00
wusbcore usb: hub: rename khubd to hub_wq in documentation and comments 2014-09-23 22:33:19 -07:00
Kconfig usb: Add LED triggers for USB activity 2014-09-25 17:05:12 +02:00
Makefile usbip: move usbip kernel code out of staging 2014-08-25 10:40:06 -07:00
README usb: hub: rename khubd to hub_wq in documentation and comments 2014-09-23 22:33:19 -07:00
usb-skeleton.c usb: delete non-required instances of include <linux/init.h> 2014-01-08 15:01:39 -08:00

To understand all the Linux-USB framework, you'll use these resources:

    * This source code.  This is necessarily an evolving work, and
      includes kerneldoc that should help you get a current overview.
      ("make pdfdocs", and then look at "usb.pdf" for host side and
      "gadget.pdf" for peripheral side.)  Also, Documentation/usb has
      more information.

    * The USB 2.0 specification (from www.usb.org), with supplements
      such as those for USB OTG and the various device classes.
      The USB specification has a good overview chapter, and USB
      peripherals conform to the widely known "Chapter 9".

    * Chip specifications for USB controllers.  Examples include
      host controllers (on PCs, servers, and more); peripheral
      controllers (in devices with Linux firmware, like printers or
      cell phones); and hard-wired peripherals like Ethernet adapters.

    * Specifications for other protocols implemented by USB peripheral
      functions.  Some are vendor-specific; others are vendor-neutral
      but just standardized outside of the www.usb.org team.

Here is a list of what each subdirectory here is, and what is contained in
them.

core/		- This is for the core USB host code, including the
		  usbfs files and the hub class driver ("hub_wq").

host/		- This is for USB host controller drivers.  This
		  includes UHCI, OHCI, EHCI, and others that might
		  be used with more specialized "embedded" systems.

gadget/		- This is for USB peripheral controller drivers and
		  the various gadget drivers which talk to them.


Individual USB driver directories.  A new driver should be added to the
first subdirectory in the list below that it fits into.

image/		- This is for still image drivers, like scanners or
		  digital cameras.
../input/	- This is for any driver that uses the input subsystem,
		  like keyboard, mice, touchscreens, tablets, etc.
../media/	- This is for multimedia drivers, like video cameras,
		  radios, and any other drivers that talk to the v4l
		  subsystem.
../net/		- This is for network drivers.
serial/		- This is for USB to serial drivers.
storage/	- This is for USB mass-storage drivers.
class/		- This is for all USB device drivers that do not fit
		  into any of the above categories, and work for a range
		  of USB Class specified devices. 
misc/		- This is for all USB device drivers that do not fit
		  into any of the above categories.