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| author | Andreas Herrmann <aherrman@de.ibm.com> | 2005-06-13 13:20:35 +0200 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.(none)> | 2005-06-13 21:32:48 -0500 |
| commit | 1db2c9c0931a53fe013db55fd2ff58859db31e8d (patch) | |
| tree | 1134627ac98d91896dcdb161d5df7ecef60a4de3 /drivers/s390/scsi/zfcp_erp.c | |
| parent | 64b29a130901d5b8578e9f602cf2dae56aaff224 (diff) | |
| download | linux-3.10-1db2c9c0931a53fe013db55fd2ff58859db31e8d.tar.gz linux-3.10-1db2c9c0931a53fe013db55fd2ff58859db31e8d.tar.bz2 linux-3.10-1db2c9c0931a53fe013db55fd2ff58859db31e8d.zip | |
[SCSI] zfcp: fix bug during adapter shutdown
Fixes a race between zfcp_fsf_req_dismiss_all and
zfcp_qdio_reqid_check. During adapter shutdown it occurred that a
request was cleaned up twice. First during its normal
completion. Second when dismiss_all was called. The fix is to
serialize access to fsf request list between zfcp_fsf_req_dismiss_all
and zfcp_qdio_reqid_check and delete a fsf request from the list if
its completion is triggered. (Additionally a rwlock was replaced by a
spinlock and fsf_req_cleanup was eliminated.)
Signed-off-by: Andreas Herrmann <aherrman@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/s390/scsi/zfcp_erp.c')
| -rw-r--r-- | drivers/s390/scsi/zfcp_erp.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c index 41c67e1ec4f..6d73891eec9 100644 --- a/drivers/s390/scsi/zfcp_erp.c +++ b/drivers/s390/scsi/zfcp_erp.c @@ -891,7 +891,7 @@ zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *erp_action) if (erp_action->fsf_req) { /* take lock to ensure that request is not being deleted meanwhile */ - write_lock(&adapter->fsf_req_list_lock); + spin_lock(&adapter->fsf_req_list_lock); /* check whether fsf req does still exist */ list_for_each_entry(fsf_req, &adapter->fsf_req_list_head, list) if (fsf_req == erp_action->fsf_req) @@ -934,7 +934,7 @@ zfcp_erp_strategy_check_fsfreq(struct zfcp_erp_action *erp_action) */ erp_action->fsf_req = NULL; } - write_unlock(&adapter->fsf_req_list_lock); + spin_unlock(&adapter->fsf_req_list_lock); } else debug_text_event(adapter->erp_dbf, 3, "a_ca_noreq"); |