linux/drivers/rapidio
Alexandre Bounine 0193ed8225 rapidio/tsi721_dma: fix failure to obtain transaction descriptor
This is a bug fix for the situation when function tsi721_desc_get() fails
to obtain a free transaction descriptor.

The bug usually results in a memory access crash dump when data transfer
scatter-gather list has more entries than size of hardware buffer
descriptors ring.  This fix ensures that error is properly returned to a
caller instead of an invalid entry.

This patch is applicable to kernel versions starting from v3.5.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Andre van Herk <andre.van.herk@prodrive-technologies.com>
Cc: Stef van Os <stef.van.os@prodrive-technologies.com>
Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: <stable@vger.kernel.org>	[3.5+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-07-30 17:16:13 -07:00
..
devices rapidio/tsi721_dma: fix failure to obtain transaction descriptor 2014-07-30 17:16:13 -07:00
switches Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2013-07-13 14:52:21 -07:00
Kconfig rapidio: convert switch drivers to modules 2013-07-03 16:08:04 -07:00
Makefile rapidio: add modular build option for the subsystem core 2013-07-03 16:08:05 -07:00
rio-access.c
rio-driver.c rapidio: rework device hierarchy and introduce mport class of devices 2014-04-07 16:36:07 -07:00
rio-scan.c rapidio: rework device hierarchy and introduce mport class of devices 2014-04-07 16:36:07 -07:00
rio-sysfs.c rapidio: rework device hierarchy and introduce mport class of devices 2014-04-07 16:36:07 -07:00
rio.c rapidio: rework device hierarchy and introduce mport class of devices 2014-04-07 16:36:07 -07:00
rio.h rapidio: rework device hierarchy and introduce mport class of devices 2014-04-07 16:36:07 -07:00