diff options
| author | Brian King <brking@linux.vnet.ibm.com> | 2009-03-20 23:44:35 +0300 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2009-04-03 18:22:42 +0400 |
| commit | 039a08981a49e05f09db969cdd3f38f05a5df46f (patch) | |
| tree | b7ba49c8740a97ea4be7c7d99445ec3a224f45a7 /drivers/scsi/ibmvscsi/ibmvfc.h | |
| parent | 8fe74cf053de7ad2124a894996f84fa890a81093 (diff) | |
| download | linux-039a08981a49e05f09db969cdd3f38f05a5df46f.tar.xz | |
[SCSI] ibmvfc: Fix dropped interrupts
This patch fixes a problem of possible dropped interrupts. Currently,
the ibmvfc driver has a race condition where after ibmvfc_interrupt
gets run, the platform code clears the interrupt. This can result in
lost interrupts and, in worst case scenarios, result in command
timeouts. Fix this by implementing a tasklet similar to what the
ibmvscsi driver does so that interrupt processing is no longer done in
the actual interrupt handler, which eliminates the race.
Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi/ibmvscsi/ibmvfc.h')
| -rw-r--r-- | drivers/scsi/ibmvscsi/ibmvfc.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/scsi/ibmvscsi/ibmvfc.h b/drivers/scsi/ibmvscsi/ibmvfc.h index b21e071b9862..70107522e3a9 100644 --- a/drivers/scsi/ibmvscsi/ibmvfc.h +++ b/drivers/scsi/ibmvscsi/ibmvfc.h @@ -684,6 +684,7 @@ struct ibmvfc_host { char partition_name[97]; void (*job_step) (struct ibmvfc_host *); struct task_struct *work_thread; + struct tasklet_struct tasklet; wait_queue_head_t init_wait_q; wait_queue_head_t work_wait_q; }; |