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| author | Swen Schillig <swen@vnet.ibm.com> | 2008-07-02 10:56:33 +0200 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-07-12 08:22:34 -0500 |
| commit | 7afe29f7dd6dccbe454d7fd6cd6a5a7f7bcbc530 (patch) | |
| tree | daf51c1875d1080d1dedc9094159ad44cc557a10 /drivers/s390 | |
| parent | 3968ce800f45d8795ceb6f186c1efe420c98e1b0 (diff) | |
| download | op-kernel-dev-7afe29f7dd6dccbe454d7fd6cd6a5a7f7bcbc530.zip op-kernel-dev-7afe29f7dd6dccbe454d7fd6cd6a5a7f7bcbc530.tar.gz | |
[SCSI] zfcp: Adapter reopen for large number of unsolicited status
When zfcp receives 16 unsolicited status messages, this could trigger
an adapter reopen. In this case, first try to send a new status read,
and only if this fails, go through the recovery.
Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/scsi/zfcp_aux.c | 15 | ||||
| -rw-r--r-- | drivers/s390/scsi/zfcp_def.h | 3 |
2 files changed, 8 insertions, 10 deletions
diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c index 2bd80fd..bfcd1ba 100644 --- a/drivers/s390/scsi/zfcp_aux.c +++ b/drivers/s390/scsi/zfcp_aux.c @@ -550,15 +550,14 @@ static void zfcp_dummy_release(struct device *dev) int zfcp_status_read_refill(struct zfcp_adapter *adapter) { while (atomic_read(&adapter->stat_miss) > 0) - if (zfcp_fsf_status_read(adapter, ZFCP_WAIT_FOR_SBAL)) + if (zfcp_fsf_status_read(adapter, ZFCP_WAIT_FOR_SBAL)) { + if (atomic_read(&adapter->stat_miss) >= 16) { + zfcp_erp_adapter_reopen(adapter, 0, 103, NULL); + return 1; + } break; - else - atomic_dec(&adapter->stat_miss); - - if (ZFCP_STATUS_READS_RECOM <= atomic_read(&adapter->stat_miss)) { - zfcp_erp_adapter_reopen(adapter, 0, 103, NULL); - return 1; - } + } else + atomic_dec(&adapter->stat_miss); return 0; } diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h index 1e837d4..202f7e6 100644 --- a/drivers/s390/scsi/zfcp_def.h +++ b/drivers/s390/scsi/zfcp_def.h @@ -108,7 +108,6 @@ zfcp_address_to_sg(void *address, struct scatterlist *list, unsigned int size) #define ZFCP_QTCB_VERSION FSF_QTCB_CURRENT_VERSION /* ATTENTION: value must not be used by hardware */ #define FSF_QTCB_UNSOLICITED_STATUS 0x6305 -#define ZFCP_STATUS_READS_RECOM FSF_STATUS_READS_RECOM /* Do 1st retry in 1 second, then double the timeout for each following retry */ #define ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP 1 @@ -743,7 +742,7 @@ struct zfcp_data { #define ZFCP_POOL_FSF_REQ_ERP_NR 1 #define ZFCP_POOL_FSF_REQ_SCSI_NR 1 #define ZFCP_POOL_FSF_REQ_ABORT_NR 1 -#define ZFCP_POOL_STATUS_READ_NR ZFCP_STATUS_READS_RECOM +#define ZFCP_POOL_STATUS_READ_NR FSF_STATUS_READS_RECOM #define ZFCP_POOL_DATA_GID_PN_NR 1 /* struct used by memory pools for fsf_requests */ |
