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authorLinus Torvalds <torvalds@linux-foundation.org>2017-11-23 21:12:58 -1000
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-23 21:12:58 -1000
commit06c944005bc3bfe21fd5706120a2cf8eeee76284 (patch)
tree832c649a9e9d7dd78689dc625c8fa08bf76947f7 /drivers/scsi/bnx2fc/bnx2fc_io.c
parentb64f26c62dc6e29d98bd72854ac582bb66113331 (diff)
parent5ebde4694e3b572c4623fd46be98e5c0ca70b522 (diff)
Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley: "Two basic fixes: one for the sparse problem with the blacklist flags and another for a hang forever in bnx2i" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: Use 'blist_flags_t' for scsi_devinfo flags scsi: bnx2fc: Fix hung task messages when a cleanup response is not received during abort
Diffstat (limited to 'drivers/scsi/bnx2fc/bnx2fc_io.c')
-rw-r--r--drivers/scsi/bnx2fc/bnx2fc_io.c40
1 files changed, 32 insertions, 8 deletions
diff --git a/drivers/scsi/bnx2fc/bnx2fc_io.c b/drivers/scsi/bnx2fc/bnx2fc_io.c
index 5b6153f23f01..8e2f767147cb 100644
--- a/drivers/scsi/bnx2fc/bnx2fc_io.c
+++ b/drivers/scsi/bnx2fc/bnx2fc_io.c
@@ -1084,24 +1084,35 @@ static int bnx2fc_abts_cleanup(struct bnx2fc_cmd *io_req)
{
struct bnx2fc_rport *tgt = io_req->tgt;
int rc = SUCCESS;
+ unsigned int time_left;
io_req->wait_for_comp = 1;
bnx2fc_initiate_cleanup(io_req);
spin_unlock_bh(&tgt->tgt_lock);
- wait_for_completion(&io_req->tm_done);
-
+ /*
+ * Can't wait forever on cleanup response lest we let the SCSI error
+ * handler wait forever
+ */
+ time_left = wait_for_completion_timeout(&io_req->tm_done,
+ BNX2FC_FW_TIMEOUT);
io_req->wait_for_comp = 0;
+ if (!time_left)
+ BNX2FC_IO_DBG(io_req, "%s(): Wait for cleanup timed out.\n",
+ __func__);
+
/*
- * release the reference taken in eh_abort to allow the
- * target to re-login after flushing IOs
+ * Release reference held by SCSI command the cleanup completion
+ * hits the BNX2FC_CLEANUP case in bnx2fc_process_cq_compl() and
+ * thus the SCSI command is not returnedi by bnx2fc_scsi_done().
*/
kref_put(&io_req->refcount, bnx2fc_cmd_release);
spin_lock_bh(&tgt->tgt_lock);
return rc;
}
+
/**
* bnx2fc_eh_abort - eh_abort_handler api to abort an outstanding
* SCSI command
@@ -1118,6 +1129,7 @@ int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd)
struct fc_lport *lport;
struct bnx2fc_rport *tgt;
int rc;
+ unsigned int time_left;
rc = fc_block_scsi_eh(sc_cmd);
if (rc)
@@ -1194,6 +1206,11 @@ int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd)
if (cancel_delayed_work(&io_req->timeout_work))
kref_put(&io_req->refcount,
bnx2fc_cmd_release); /* drop timer hold */
+ /*
+ * We don't want to hold off the upper layer timer so simply
+ * cleanup the command and return that I/O was successfully
+ * aborted.
+ */
rc = bnx2fc_abts_cleanup(io_req);
/* This only occurs when an task abort was requested while ABTS
is in progress. Setting the IO_CLEANUP flag will skip the
@@ -1201,7 +1218,7 @@ int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd)
was a result from the ABTS request rather than the CLEANUP
request */
set_bit(BNX2FC_FLAG_IO_CLEANUP, &io_req->req_flags);
- goto out;
+ goto done;
}
/* Cancel the current timer running on this io_req */
@@ -1221,7 +1238,11 @@ int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd)
}
spin_unlock_bh(&tgt->tgt_lock);
- wait_for_completion(&io_req->tm_done);
+ /* Wait 2 * RA_TOV + 1 to be sure timeout function hasn't fired */
+ time_left = wait_for_completion_timeout(&io_req->tm_done,
+ (2 * rp->r_a_tov + 1) * HZ);
+ if (time_left)
+ BNX2FC_IO_DBG(io_req, "Timed out in eh_abort waiting for tm_done");
spin_lock_bh(&tgt->tgt_lock);
io_req->wait_for_comp = 0;
@@ -1233,8 +1254,12 @@ int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd)
/* Let the scsi-ml try to recover this command */
printk(KERN_ERR PFX "abort failed, xid = 0x%x\n",
io_req->xid);
+ /*
+ * Cleanup firmware residuals before returning control back
+ * to SCSI ML.
+ */
rc = bnx2fc_abts_cleanup(io_req);
- goto out;
+ goto done;
} else {
/*
* We come here even when there was a race condition
@@ -1249,7 +1274,6 @@ int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd)
done:
/* release the reference taken in eh_abort */
kref_put(&io_req->refcount, bnx2fc_cmd_release);
-out:
spin_unlock_bh(&tgt->tgt_lock);
return rc;
}