redonkable/alistair23-linux
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[SCSI] bnx2fc: Handle ABTS timeout during ulp timeout

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If the IO and the corresponding ABTS are not responded by a target, cleanup the
IO and issue explicit logout when ulp timer expires while waiting for ABTS to
complete. Wait for the session to be ready before returning to the SCSI layer.
If the session is not ready let the SCSI-ml escalate the error recovery.

Signed-off-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Bhanu Prakash Gollapudi 2011-10-23 23:23:56 -07:00 committed by James Bottomley
parent c68bf8eeaa
commit 99cc600cdd
2 changed files with 40 additions and 0 deletions
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3
drivers/scsi/bnx2fc/bnx2fc.h
View file

@ -145,6 +145,9 @@
#define REC_RETRY_COUNT 1
#define BNX2FC_NUM_ERR_BITS 63
#define BNX2FC_RELOGIN_WAIT_TIME 200
#define BNX2FC_RELOGIN_WAIT_CNT 10
/* bnx2fc driver uses only one instance of fcoe_percpu_s */
extern struct fcoe_percpu_s bnx2fc_global;

37
drivers/scsi/bnx2fc/bnx2fc_io.c
View file

@ -1103,7 +1103,10 @@ int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd)
struct fc_rport_libfc_priv *rp = rport->dd_data;
struct bnx2fc_cmd *io_req;
struct fc_lport *lport;
struct fc_rport_priv *rdata;
struct bnx2fc_rport *tgt;
int logo_issued;
int wait_cnt = 0;
int rc = FAILED;
@ -1192,8 +1195,40 @@ int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd)
} else {
printk(KERN_ERR PFX "eh_abort: io_req (xid = 0x%x) "
"already in abts processing\n", io_req->xid);
if (cancel_delayed_work(&io_req->timeout_work))
kref_put(&io_req->refcount,
bnx2fc_cmd_release); /* drop timer hold */
bnx2fc_initiate_cleanup(io_req);
spin_unlock_bh(&tgt->tgt_lock);
wait_for_completion(&io_req->tm_done);
spin_lock_bh(&tgt->tgt_lock);
io_req->wait_for_comp = 0;
rdata = io_req->tgt->rdata;
logo_issued = test_and_set_bit(BNX2FC_FLAG_EXPL_LOGO,
&tgt->flags);
kref_put(&io_req->refcount, bnx2fc_cmd_release);
spin_unlock_bh(&tgt->tgt_lock);
if (!logo_issued) {
BNX2FC_IO_DBG(io_req, "Expl logo - tgt flags = 0x%lx\n",
tgt->flags);
mutex_lock(&lport->disc.disc_mutex);
lport->tt.rport_logoff(rdata);
mutex_unlock(&lport->disc.disc_mutex);
do {
msleep(BNX2FC_RELOGIN_WAIT_TIME);
/*
* If session not recovered, let SCSI-ml
* escalate error recovery.
*/
if (wait_cnt++ > BNX2FC_RELOGIN_WAIT_CNT)
return FAILED;
} while (!test_bit(BNX2FC_FLAG_SESSION_READY,
&tgt->flags));
}
return SUCCESS;
}
if (rc == FAILED) {
@ -1275,6 +1310,8 @@ void bnx2fc_process_cleanup_compl(struct bnx2fc_cmd *io_req,
io_req->refcount.refcount.counter, io_req->cmd_type);
bnx2fc_scsi_done(io_req, DID_ERROR);
kref_put(&io_req->refcount, bnx2fc_cmd_release);
if (io_req->wait_for_comp)
complete(&io_req->tm_done);
}
void bnx2fc_process_abts_compl(struct bnx2fc_cmd *io_req,