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fnic: IOMMU Fault occurs when IO and abort IO is out of order

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When I/O is aborted by mid-layer, fnic FW will complete the I/O before
completing the abort task. In some cases abort request is completed before
the I/O, which could lead to inconsistent driver and firmware states.
In this case firmware reset would clear the inconsistent state.

Signed-off-by: Anil Chintalapati <achintal@cisco.com>
Signed-off-by: Sesidhar Baddela <sebaddel@cisco.com>
Signed-off-by: Hiral Shah <hishah@cisco.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Anil Chintalapati (achintal) 2014-12-23 19:40:00 +00:00 committed by Christoph Hellwig
parent e461338b6c
commit efc7a28838
2 changed files with 16 additions and 1 deletions
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2
drivers/scsi/fnic/fnic.h
View File

@ -39,7 +39,7 @@
#define DRV_NAME "fnic"
#define DRV_DESCRIPTION "Cisco FCoE HBA Driver"
#define DRV_VERSION "1.6.0.16"
#define DRV_VERSION "1.6.0.17"
#define PFX DRV_NAME ": "
#define DFX DRV_NAME "%d: "

15
drivers/scsi/fnic/fnic_scsi.c
View File

@ -1892,6 +1892,21 @@ int fnic_abort_cmd(struct scsi_cmnd *sc)
goto fnic_abort_cmd_end;
}
/* IO out of order */
if (!(CMD_FLAGS(sc) & (FNIC_IO_ABORTED | FNIC_IO_DONE))) {
spin_unlock_irqrestore(io_lock, flags);
FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
"Issuing Host reset due to out of order IO\n");
if (fnic_host_reset(sc) == FAILED) {
FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
"fnic_host_reset failed.\n");
}
ret = FAILED;
goto fnic_abort_cmd_end;
}
CMD_STATE(sc) = FNIC_IOREQ_ABTS_COMPLETE;
/*