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| author | Matthew R. Ochs <mrochs@linux.vnet.ibm.com> | 2015-10-21 23:13:21 +0300 |
|---|---|---|
| committer | James Bottomley <JBottomley@Odin.com> | 2015-10-30 11:10:38 +0300 |
| commit | 018d1dc9558e748e271cd1600c698f68cba3fb09 (patch) | |
| tree | 7e3a85a14b1a516620e222bd13a3e44d24408049 /drivers/scsi/cxlflash/common.h | |
| parent | 4392ba49eb248868afb412ea147ab16e2e606d66 (diff) | |
| download | linux-018d1dc9558e748e271cd1600c698f68cba3fb09.tar.xz | |
cxlflash: Fix to avoid stall while waiting on TMF
Borrowing the TMF waitq's spinlock causes a stall condition when
waiting for the TMF to complete. To remedy, introduce our own spin
lock to serialize TMF and use the appropriate wait services.
Also add a timeout while waiting for a TMF completion. When a TMF
times out, report back a failure such that a bigger hammer reset
can occur.
Signed-off-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Manoj N. Kumar <manoj@linux.vnet.ibm.com>
Reviewed-by: Brian King <brking@linux.vnet.ibm.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
Diffstat (limited to 'drivers/scsi/cxlflash/common.h')
| -rw-r--r-- | drivers/scsi/cxlflash/common.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/scsi/cxlflash/common.h b/drivers/scsi/cxlflash/common.h index b038ac7e76d9..7a0cb5c0dad4 100644 --- a/drivers/scsi/cxlflash/common.h +++ b/drivers/scsi/cxlflash/common.h @@ -124,6 +124,7 @@ struct cxlflash_cfg { struct list_head lluns; /* list of llun_info structs */ wait_queue_head_t tmf_waitq; + spinlock_t tmf_slock; bool tmf_active; wait_queue_head_t reset_waitq; enum cxlflash_state state; |