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| author | Bodo Stroesser <bstroesser@ts.fujitsu.com> | 2020-04-09 12:10:26 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2020-04-13 20:03:20 +0200 |
| commit | 066f79a5fd6d1b9a5cc57b5cd445b3e4bb68a5b2 (patch) | |
| tree | d43fc4587ad562077706fcffd0e0798878d1d984 /drivers | |
| parent | scsi: target: fix PR IN / READ FULL STATUS for FC (diff) | |
| download | linux-066f79a5fd6d1b9a5cc57b5cd445b3e4bb68a5b2.tar.xz linux-066f79a5fd6d1b9a5cc57b5cd445b3e4bb68a5b2.zip | |
scsi: target: tcmu: reset_ring should reset TCMU_DEV_BIT_BROKEN
In case command ring buffer becomes inconsistent, tcmu sets device flag
TCMU_DEV_BIT_BROKEN. If the bit is set, tcmu rejects new commands from LIO
core with TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE, and no longer processes
completions from the ring. The reset_ring attribute can be used to
completely clean up the command ring, so after reset_ring the ring no
longer is inconsistent.
Therefore reset_ring also should reset bit TCMU_DEV_BIT_BROKEN to allow
normal processing.
Link: https://lore.kernel.org/r/20200409101026.17872-1-bstroesser@ts.fujitsu.com
Acked-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Bodo Stroesser <bstroesser@ts.fujitsu.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/target/target_core_user.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c index 0b9dfa6b17bc..f769bb1e3735 100644 --- a/drivers/target/target_core_user.c +++ b/drivers/target/target_core_user.c @@ -2073,6 +2073,7 @@ static void tcmu_reset_ring(struct tcmu_dev *udev, u8 err_level) mb->cmd_tail = 0; mb->cmd_head = 0; tcmu_flush_dcache_range(mb, sizeof(*mb)); + clear_bit(TCMU_DEV_BIT_BROKEN, &udev->flags); del_timer(&udev->cmd_timer); |