diff options
| author | Bodo Stroesser <bstroesser@ts.fujitsu.com> | 2020-04-09 12:10:26 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-05-02 08:51:00 +0200 |
| commit | 0e268da76acb3dabfd4c0fcd922f84530ce8d983 (patch) | |
| tree | 5368540f7c5d78bb65622f2cf95ca64c6e29d97d | |
| parent | d31d19b972b1c7404df9fb45eef28dd404c46afb (diff) | |
scsi: target: tcmu: reset_ring should reset TCMU_DEV_BIT_BROKEN
[ Upstream commit 066f79a5fd6d1b9a5cc57b5cd445b3e4bb68a5b2 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -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); |