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scsi: cxlflash: Scan host only after the port is ready for I/O
When a port link is established, the AFU sends a 'link up' interrupt. After the link is up, corresponding initialization steps are performed on the card. Following that, when the card is ready for I/O, the AFU sends 'login succeeded' interrupt. Today, cxlflash invokes scsi_scan_host() upon receipt of both interrupts. SCSI commands sent to the port prior to the 'login succeeded' interrupt will fail with 'port not available' error. This is not desirable. Moreover, when async_scan is active for the host, subsequent scan calls are terminated with error. Due to this, the scsi_scan_host() call performed after 'login succeeded' interrupt could portentially return error and the devices may not be scanned properly. To avoid this problem, scsi_scan_host() should be called only after the 'login succeeded' interrupt. Signed-off-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com> Acked-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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parent
6c46301fc5
commit
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1 changed files with 2 additions and 2 deletions
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@ -1187,7 +1187,7 @@ static const struct asyc_intr_info ainfo[] = {
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{SISL_ASTATUS_FC0_LOGI_F, "login failed", 0, CLR_FC_ERROR},
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{SISL_ASTATUS_FC0_LOGI_S, "login succeeded", 0, SCAN_HOST},
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{SISL_ASTATUS_FC0_LINK_DN, "link down", 0, 0},
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{SISL_ASTATUS_FC0_LINK_UP, "link up", 0, SCAN_HOST},
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{SISL_ASTATUS_FC0_LINK_UP, "link up", 0, 0},
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{SISL_ASTATUS_FC1_OTHER, "other error", 1, CLR_FC_ERROR | LINK_RESET},
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{SISL_ASTATUS_FC1_LOGO, "target initiated LOGO", 1, 0},
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{SISL_ASTATUS_FC1_CRC_T, "CRC threshold exceeded", 1, LINK_RESET},
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@ -1195,7 +1195,7 @@ static const struct asyc_intr_info ainfo[] = {
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{SISL_ASTATUS_FC1_LOGI_F, "login failed", 1, CLR_FC_ERROR},
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{SISL_ASTATUS_FC1_LOGI_S, "login succeeded", 1, SCAN_HOST},
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{SISL_ASTATUS_FC1_LINK_DN, "link down", 1, 0},
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{SISL_ASTATUS_FC1_LINK_UP, "link up", 1, SCAN_HOST},
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{SISL_ASTATUS_FC1_LINK_UP, "link up", 1, 0},
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{0x0, "", 0, 0} /* terminator */
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};
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