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| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2011-05-19 20:19:10 -0700 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2011-05-27 11:49:25 +0000 |
| commit | 1e7de68c57daf75ec4b721f101f88cccf029e38c (patch) | |
| tree | 730f6aa856ab971dfaea53a018a5fa61e67c1925 /drivers/target/target_core_device.c | |
| parent | 4a8fcc2cc34b7546584bf9ebd8f0caf433e4736e (diff) | |
| download | linux-1e7de68c57daf75ec4b721f101f88cccf029e38c.tar.gz linux-1e7de68c57daf75ec4b721f101f88cccf029e38c.tar.xz linux-1e7de68c57daf75ec4b721f101f88cccf029e38c.zip | |
[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>
Diffstat (limited to 'drivers/target/target_core_device.c')
| -rw-r--r-- | drivers/target/target_core_device.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c index d25e20829012..fc10ed4ac493 100644 --- a/drivers/target/target_core_device.c +++ b/drivers/target/target_core_device.c @@ -150,13 +150,13 @@ out: { struct se_device *dev = se_lun->lun_se_dev; - spin_lock(&dev->stats_lock); + spin_lock_irq(&dev->stats_lock); dev->num_cmds++; if (se_cmd->data_direction == DMA_TO_DEVICE) dev->write_bytes += se_cmd->data_length; else if (se_cmd->data_direction == DMA_FROM_DEVICE) dev->read_bytes += se_cmd->data_length; - spin_unlock(&dev->stats_lock); + spin_unlock_irq(&dev->stats_lock); } /* |