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>
The usb tree renamed the USB storage defines to make more sense, so this
driver needs the changes as well so that things will compile properly.
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This driver is for the ENE card reader that can be found in many
different laptops. It was written by ENE, but cleaned up to
work properly in the kernel tree by Novell.
Signed-off-by: Al Cho <acho@novell.com>
Cc: <yiyingc@ene.com.tw>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Ruslan Pisarev