tree 9a1b10d03d4c6aa91076dd6ea55a3874f0db590c
parent 97868c8905a1537153d406c4a3aa39a503a5c299
author Nicholas Bellinger <nab@linux-iscsi.org> 1305861550 -0700
committer James Bottomley <jbottomley@parallels.com> 1306256297 -0400

[SCSI] target: Fix interrupt context bug with stats_lock and core_tmr_alloc_req

This patch fixes two bugs wrt to the interrupt context usage of target
core with HW target mode drivers.  It first converts the usage of struct
se_device->stats_lock in transport_get_lun_for_cmd() and core_tmr_lun_reset()
to properly use spin_lock_irq() to address an BUG with CONFIG_LOCKDEP_SUPPORT=y
enabled.

This patch also adds a 'in_interrupt()' check to allow GFP_ATOMIC usage from
core_tmr_alloc_req() to fix a 'sleeping in interrupt context' BUG with HW
target fabrics that require this logic to function.

Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: stable@kernel.org
Signed-off-by: James Bottomley <jbottomley@parallels.com>