linux-toradex.git/drivers/block, branch v3.1.1

xen/blkback: Report VBD_WSECT (wr_sect) properly.

2011-11-11T17:44:32+00:00

commit 5c62cb48602dba95159c81ffeca179d3852e25be upstream.

We did not increment the amount of sectors written to disk
b/c we tested for the == WRITE which is incorrect - as the
operations are more of WRITE_FLUSH, WRITE_ODIRECT. This patch
fixes it by doing a & WRITE check.

Reported-by: Andy Burns 
Suggested-by: Ian Campbell 
Signed-off-by: Konrad Rzeszutek Wilk 
Signed-off-by: Greg Kroah-Hartman

cciss: add small delay when using PCI Power Management to reset for kump

2011-11-11T17:44:13+00:00

commit ab5dbebe33e0c353e8545f09c34553ac3351dad6 upstream.

The P600 requires a small delay when changing states. Otherwise we may think
the board did not reset and we bail. This for kdump only and is particular
to the P600.

Signed-off-by: Jens Axboe 
Signed-off-by: Greg Kroah-Hartman

floppy: use del_timer_sync() in init cleanup

2011-09-21T08:22:11+00:00

When no floppy is found the module code can be released while a timer
function is pending or about to be executed.

CPU0                                  CPU1
				      floppy_init()
timer_softirq()
   spin_lock_irq(&base->lock);
   detach_timer();
   spin_unlock_irq(&base->lock);
   -> Interrupt
					del_timer();
				        return -ENODEV;
                                      module_cleanup();
   <- EOI
   call_timer_fn();
   OOPS

Use del_timer_sync() to prevent this.

Signed-off-by: Carsten Emde 
Signed-off-by: Thomas Gleixner 
Cc: Jens Axboe 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Jens Axboe

Merge branch 'stable/for-jens' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen into for-linus

2011-08-23T13:09:13+00:00

xen-blkback: fixed indentation and comments

2011-08-22T15:35:36+00:00

This patch fixes belows:

1. Fix code style issue.
2. Fix incorrect functions name in comments.

Signed-off-by: Joe Jin 
Cc: Jens Axboe 
Cc: Ian Campbell 
Signed-off-by: Konrad Rzeszutek Wilk

xen-blkback: Don't disconnect backend until state switched to XenbusStateClosed.

2011-08-22T15:35:35+00:00

When do block-attach/block-detach test with below steps, umount hangs
in the guest. Furthermore shutdown ends up being stuck when umounting file-systems.

1. start guest.
2. attach new block device by xm block-attach in Dom0.
3. mount new disk in guest.
4. execute xm block-detach to detach the block device in dom0 until timeout
5. Any request to the disk will hung.

Root cause:
This issue is caused when setting backend device's state to
'XenbusStateClosing', which sends to the frontend the XenbusStateClosing
notification. When frontend receives the notification it tries to release
the disk in blkfront_closing(), but at that moment the disk is still in use
by guest, so frontend refuses to close. Specifically it sets the disk state to
XenbusStateClosing and sends the notification to backend - when backend receives the
event, it disconnects the vbd from real device, and sets the vbd device state to
XenbusStateClosing. The backend disconnects the real device/file, and any IO
requests to the disk in guest will end up in ether, leaving disk DEAD and set to
XenbusStateClosing. When the guest wants to disconnect the disk, umount will
hang on blkif_release()->xlvbd_release_gendisk() as it is unable to send any IO
to the disk, which prevents clean system shutdown.

Solution:
Don't disconnect backend until frontend state switched to XenbusStateClosed.

Signed-off-by: Joe Jin 
Cc: Daniel Stodden 
Cc: Jens Axboe 
Cc: Annie Li 
Cc: Ian Campbell 
[v1: Modified description a bit]
Signed-off-by: Konrad Rzeszutek Wilk

Merge branch 'stable/for-jens' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen into for-linus

2011-08-09T18:43:26+00:00

xen/blkback: Make description more obvious.

2011-08-09T15:12:14+00:00

With the frontend having Xen but the backend not, it just looks odd:

  <*>   Xen virtual block device support
  <*>   Block-device backend driver

Fix it to have the 'Xen' in front of it.

Reported-by: Sander Eikelenboom 
Signed-off-by: Konrad Rzeszutek Wilk

block: swim3: fix unterminated of_device_id table

2011-08-03T13:02:55+00:00

of_device_id structures need a NULL terminating entry, add it.

Signed-off-by: Axel Lin 
Signed-off-by: Jens Axboe

drivers/block/drbd/drbd_nl.c: use bitmap_parse instead of __bitmap_parse

2011-08-02T10:43:49+00:00

The buffer 'sc.cpu_mask' is a kernel buffer.  If bitmap_parse is used
instead of __bitmap_parse the extra parameter that indicates a kernel
buffer is not needed.

Signed-off-by: H Hartley Sweeten 
Cc: Lars Ellenberg 
Cc: Philipp Reisner 
Cc: Jens Axboe 
Signed-off-by: Andrew Morton 
Signed-off-by: Jens Axboe