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linux/drivers/usb/storage
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Jeff Garzik f281233d3e SCSI host lock push-down 
Move the mid-layer's ->queuecommand() invocation from being locked
with the host lock to being unlocked to facilitate speeding up the
critical path for drivers who don't need this lock taken anyway.

The patch below presents a simple SCSI host lock push-down as an
equivalent transformation.  No locking or other behavior should change
with this patch.  All existing bugs and locking orders are preserved.

Additionally, add one parameter to queuecommand,
	struct Scsi_Host *
and remove one parameter from queuecommand,
	void (*done)(struct scsi_cmnd *)

Scsi_Host* is a convenient pointer that most host drivers need anyway,
and 'done' is redundant to struct scsi_cmnd->scsi_done.

Minimal code disturbance was attempted with this change.  Most drivers
needed only two one-line modifications for their host lock push-down.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Acked-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-16 13:33:23 -08:00
..
alauda.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
cypress_atacb.c USB: usb-storage: added missing MODULE_LICENSE("GPL") for usb-storage ums-* modules 2009-03-24 16:20:35 -07:00
datafab.c USB: storage: Drop an unneeded a NULL test 2009-09-23 06:46:29 -07:00
debug.c USB: remove CVS keywords 2008-07-21 15:15:55 -07:00
debug.h USB: remove CVS keywords 2008-07-21 15:15:55 -07:00
freecom.c usb: storage: freecom: Fixed several coding style issues. 2010-08-10 14:35:39 -07:00
initializers.c USB: usb-storage fails to attach to Huawei Datacard cdrom device 2009-09-23 06:46:32 -07:00
initializers.h USB: remove CVS keywords 2008-07-21 15:15:55 -07:00
isd200.c USB: isd200.c: Remove unnecessary kmalloc cast 2010-08-10 14:35:34 -07:00
jumpshot.c USB: storage: Drop an unneeded a NULL test 2009-09-23 06:46:29 -07:00
karma.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
Kconfig Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-10-24 13:41:39 -07:00
libusual.c usb-storage: prepare for subdriver separation 2009-03-24 16:20:34 -07:00
Makefile usb: makefile cleanup 2010-10-22 10:22:07 -07:00
onetouch.c USB: rename usb_buffer_alloc() and usb_buffer_free() users 2010-05-20 13:21:38 -07:00
option_ms.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
option_ms.h USB: unusual dev for Option N.V. ZeroCD modems 2009-01-07 10:00:09 -08:00
protocol.c usb-storage: prepare for subdriver separation 2009-03-24 16:20:34 -07:00
protocol.h USB: usb-storage: merge ATAPI and QIC-157 protocol routines 2009-01-07 09:59:57 -08:00
scsiglue.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
scsiglue.h USB: remove CVS keywords 2008-07-21 15:15:55 -07:00
sddr09.c USB: storage: Use USB_ prefix instead of US_ prefix 2010-10-22 10:21:49 -07:00
sddr55.c USB: usb-storage: added missing MODULE_LICENSE("GPL") for usb-storage ums-* modules 2009-03-24 16:20:35 -07:00
shuttle_usbat.c USB: storage: fix misplaced parenthesis 2010-03-02 14:55:08 -08:00
sierra_ms.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
sierra_ms.h USB Storage Sierra: TRU-Install feature update 2008-08-13 17:32:51 -07:00
transport.c USB: storage: Use USB_ prefix instead of US_ prefix 2010-10-22 10:21:49 -07:00
transport.h USB: usb-storage: merge CB and CBI transport routines 2009-01-07 09:59:57 -08:00
uas.c SCSI host lock push-down 2010-11-16 13:33:23 -08:00
unusual_alauda.h USB: storage: Use USB_ prefix instead of US_ prefix 2010-10-22 10:21:49 -07:00
unusual_cypress.h USB: storage: Use USB_ prefix instead of US_ prefix 2010-10-22 10:21:49 -07:00
unusual_datafab.h USB: storage: Use USB_ prefix instead of US_ prefix 2010-10-22 10:21:49 -07:00
unusual_devs.h usb-storage: add new no_read_capacity_16 quirk 2010-10-22 10:22:05 -07:00
unusual_freecom.h USB: storage: Use USB_ prefix instead of US_ prefix 2010-10-22 10:21:49 -07:00
unusual_isd200.h USB: storage: Use USB_ prefix instead of US_ prefix 2010-10-22 10:21:49 -07:00
unusual_jumpshot.h USB: storage: Use USB_ prefix instead of US_ prefix 2010-10-22 10:21:49 -07:00
unusual_karma.h USB: storage: Use USB_ prefix instead of US_ prefix 2010-10-22 10:21:49 -07:00
unusual_onetouch.h USB: storage: Use USB_ prefix instead of US_ prefix 2010-10-22 10:21:49 -07:00
unusual_sddr09.h USB: storage: Use USB_ prefix instead of US_ prefix 2010-10-22 10:21:49 -07:00
unusual_sddr55.h USB: storage: Use USB_ prefix instead of US_ prefix 2010-10-22 10:21:49 -07:00
unusual_usbat.h USB: storage: Use USB_ prefix instead of US_ prefix 2010-10-22 10:21:49 -07:00
usb.c USB: storage: Use USB_ prefix instead of US_ prefix 2010-10-22 10:21:49 -07:00
usb.h USB: remove uses of URB_NO_SETUP_DMA_MAP 2010-05-20 13:21:31 -07:00
usual-tables.c usb-storage: make onetouch a separate module 2009-03-24 16:20:35 -07:00