linux.git/drivers/block/cciss.c, branch v2.6.27

cciss: fix bug if scsi tape support is disabled

2008-08-06T10:30:04+00:00

Bug fix. If SCSI tape support is turned off we get an implicit declaration
of cciss_unregister_scsi error in cciss_remove_one.

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

cciss: fix negative logical drive count in procfs

2008-08-06T10:30:03+00:00

This patch fixes a problem where the logical volume count may go negative.
In some instances if several logical are configured on a controller and all
of them are deleted using the online utilities the volume count in /proc may
go negative with no way get it correct again.

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

cciss: remove redundant code

2008-08-06T10:30:03+00:00

This patch removes redundant code where ever logical volumes are added or
removed. It adds 3 new functions that are called instead of having the same
code spread throughout the driver. It also removes the cciss_getgeometry
function.
The patch is fairly complex but we haven't figured out how to make it any
simpler and still do everything that needs to be done. Some of the
complexity comes from having to special case booting from cciss. Otherwise
the gendisk doesn't get added in time and the switchroot will fail.

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

cciss: make rebuild_lun_table behave better

2008-08-06T10:30:03+00:00

This patch makes the rebuild_lun_table smart enough to not rip a logical
volume out from under the OS. Without this fix if a customer is running
hpacucli to monitor their storage the driver will blindly remove and re-add
the disks whenever the utility calls the CCISS_REGNEWD ioctl. Unfortunately,
both hpacucli and ACUXE call the ioctl repeatedly. Customers have reported
IO coming to a standstill. Calling the ioctl is the problem, this patch is
the fix.

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

cciss: return -EFAULT if copy_from_user() fails

2008-08-06T10:30:03+00:00

Return -EFAULT instead of -ENOMEM if copy_from_user() fails.

Signed-off-by: Nikanth Karthikesan 
Acked-by: Mike Miller 
Signed-off-by: Jens Axboe

block/cciss.c: remove pointless curr_queue calculation

2008-08-05T21:33:46+00:00

curr_queue is a local variable in a for loop, and it's being initialized
at the start of each loop.  So any assignment at the end of the loop is
pointless.

Signed-off-by: Hannes Reinecke 
Cc: Mike Miller 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

cciss: read config to obtain max outstanding commands per controller

2008-07-04T17:40:09+00:00

This patch changes the way we determine the maximum number of outstanding
commands for each controller.

Most Smart Array controllers can support up to 1024 commands, the notable
exceptions are the E200 and E200i.

The next generation of controllers which were just added support a mode of
operation called Zero Memory Raid (ZMR).  In this mode they only support
64 outstanding commands.  In Full Function Raid (FFR) mode they support
1024.

We have been setting the queue depth by arbitrarily assigning some value
for each controller.  We needed a better way to set the queue depth to
avoid lots of annoying "fifo full" messages.  So we made the driver a
little smarter.  We now read the config table and subtract 4 from the
returned value.  The -4 is to allow some room for ioctl calls which are
not tracked the same way as io commands are tracked.

Please consider this for inclusion.

Signed-off-by: Mike Miller 
Cc: Jens Axboe 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

cciss: fix regression that no device nodes are created if no logical drives are configured.

2008-07-04T17:40:06+00:00

Fix regression in cciss driver that if no logical drives are configured,
no device nodes at all get created.

Signed-off-by: Stephen M. Cameron 
Acked-by: Mike Miller 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

cciss: add new hardware support

2008-06-13T01:05:40+00:00

Add support for the next generation of HP Smart Array SAS/SATA
controllers.  Shipping date is late Fall 2008.

Bump the driver version to 3.6.20 to reflect the new hardware support from
patch 1 of this set.

Signed-off-by: Mike Miller 
Cc: Jens Axboe 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

cciss: assign PDE->data before gluing PDE into /proc tree

2008-05-01T15:04:02+00:00

Simply replace proc_create and further data assigned with proc_create_data.

Signed-off-by: Denis V. Lunev 
Cc: Alexey Dobriyan 
Cc: Eric W. Biederman 
Acked-by: Mike Miller 
Cc: Greg Kroah-Hartman 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds