linux-toradex.git/drivers/block/cciss_scsi.c, branch v4.1

cciss: switch to ->show_info()

2013-04-09T18:13:19+00:00

Signed-off-by: Al Viro

cciss: fix handling of protocol error

2012-09-18T09:57:08+00:00

If a command completes with a status of CMD_PROTOCOL_ERR, this
information should be conveyed to the SCSI mid layer, not dropped
on the floor.  Unlike a similar bug in the hpsa driver, this bug
only affects tape drives and CD and DVD ROM drives in the cciss
driver, and to induce it, you have to disconnect (or damage) a
cable, so it is not a very likely scenario (which would explain
why the bug has gone undetected for the last 10 years.)

Signed-off-by: Stephen M. Cameron 
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe

cciss: fix incorrect scsi status reporting

2012-08-21T23:45:02+00:00

Delete code which sets SCSI status incorrectly as it's already been set
correctly above this incorrect code.  The bug was introduced in 2009 by
commit b0e15f6db111 ("cciss: fix typo that causes scsi status to be
lost.")

Signed-off-by: Stephen M. Cameron 
Reported-by: Roel van Meer 
Tested-by: Roel van Meer 
Cc: Jens Axboe 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

cciss: Fix scsi tape io with more than 255 scatter gather elements

2012-03-22T20:40:09+00:00

The total number of scatter gather elements in the CISS command
used by the scsi tape code was being cast to a u8, which can hold
at most 255 scatter gather elements.  It should have been cast to
a u16.  Without this patch the command gets rejected by the controller
since the total scatter gather count did not add up to the right
value resulting in an i/o error.

Signed-off-by: Stephen M. Cameron 
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe

cciss: Initialize scsi host max_sectors for tape drive support

2012-03-22T20:40:08+00:00

The default is too small (1024 blocks), use h->cciss_max_sectors (8192 blocks)
Without this change, if you try to set the block size of a tape drive above
512*1024, via "mt -f /dev/st0 setblk nnn" where nnn is greater than 524288,
it won't work right.

Signed-off-by: Stephen M. Cameron 
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe

cciss: auto engage SCSI mid layer at driver load time

2011-11-16T08:21:49+00:00

A long time ago, probably in 2002, one of the distros, or maybe more than
one, loaded block drivers prior to loading the SCSI mid layer.  This meant
that the cciss driver, being a block driver, could not engage the SCSI mid
layer at init time without panicking, and relied on being poked by a
userland program after the system was up (and the SCSI mid layer was
therefore present) to engage the SCSI mid layer.

This is no longer the case, and cciss can safely rely on the SCSI mid
layer being present at init time and engage the SCSI mid layer straight
away.  This means that users will see their tape drives and medium
changers at driver load time without need for a script in /etc/rc.d that
does this:

for x in /proc/driver/cciss/cciss*
do
	echo "engage scsi" > $x
done

However, if no tape drives or medium changers are detected, the SCSI mid
layer will not be engaged.  If a tape drive or medium change is later
hot-added to the system it will then be necessary to use the above script
or similar for the device(s) to be acceesible.

Signed-off-by: Stephen M. Cameron 
Signed-off-by: Andrew Morton 
Signed-off-by: Jens Axboe

atomic: use

2011-07-26T23:49:47+00:00

This allows us to move duplicated code in 
(atomic_inc_not_zero() for now) to 

Signed-off-by: Arun Sharma 
Reviewed-by: Eric Dumazet 
Cc: Ingo Molnar 
Cc: David Miller 
Cc: Eric Dumazet 
Acked-by: Mike Frysinger 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

cciss: add cciss_tape_cmds module paramter

2011-05-06T14:23:59+00:00

This is to allow number of commands reserved for use by SCSI tape drives
and medium changers to be adjusted at driver load time via the kernel
parameter cciss_tape_cmds, with a default value of 6, and a range
of 2 - 16 inclusive.  Previously, the driver limited the number of
commands which could be queued to the SCSI half of the the driver
to only 2.  This is to fix the problem that if you had more than
two tape drives, you couldn't, for example, erase or rewind them all
at the same time.

Signed-off-by: Stephen M. Cameron 
Signed-off-by: Jens Axboe

Revert "cciss: Add missing allocation in scsi_cmd_stack_setup and corresponding deallocation"

2011-03-12T12:47:51+00:00

This reverts commit 978eb516a4e1a1b47163518d6f5d5e81ab27a583.

The commit was broken, relying on other changes that have not been
committed yet.

Signed-off-by: Jens Axboe

cciss: fix missed command status value CMD_UNABORTABLE

2011-03-12T09:02:30+00:00

and fix a nearby typo, "do" that should have been "due"

Signed-off-by: Stephen M. Cameron 
Signed-off-by: Jens Axboe