From: Andrew Vasquez <andrew.vasquez@qlogic.com>
Date: Fri, 28 May 2010 22:08:19 +0000 (-0700)
Subject: [SCSI] qla2xxx: Correct async-srb issues.
X-Git-Tag: v2.6.36-rc1~570^2~244
X-Git-Url: http://git.cascardo.info/?a=commitdiff_plain;h=6ac5260850841eb4055811a68ff47d658ebe9a59;p=cascardo%2Flinux.git

[SCSI] qla2xxx: Correct async-srb issues.

* hold the hardware_lock throughout the duration of ctx-sp
  timeout handling -- could result in use-after-free oops.

* retry a timed-out login-request.

* done() routines are called with the hardware-lock held, issue
qla2x00_mark_device_lost() with proper 'defer' flag.

* FCP2 capabilities are only relevant to target devices.

Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
---

diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index 4bf973483818..cc7352545081 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -60,9 +60,8 @@ qla2x00_ctx_sp_timeout(unsigned long __data)
 	ctx = sp->ctx;
 	iocb = ctx->u.iocb_cmd;
 	iocb->timeout(sp);
-	spin_unlock_irqrestore(&ha->hardware_lock, flags);
-
 	iocb->free(sp);
+	spin_unlock_irqrestore(&ha->hardware_lock, flags);
 }
 
 void
@@ -137,8 +136,16 @@ qla2x00_async_iocb_timeout(srb_t *sp)
 		fcport->d_id.b.area, fcport->d_id.b.al_pa));
 
 	fcport->flags &= ~FCF_ASYNC_SENT;
-	if (ctx->type == SRB_LOGIN_CMD)
+	if (ctx->type == SRB_LOGIN_CMD) {
+		struct srb_iocb *lio = ctx->u.iocb_cmd;
 		qla2x00_post_async_logout_work(fcport->vha, fcport, NULL);
+		/* Retry as needed. */
+		lio->u.logio.data[0] = MBS_COMMAND_ERROR;
+		lio->u.logio.data[1] = lio->u.logio.flags & SRB_LOGIN_RETRIED ?
+			QLA_LOGIO_LOGIN_RETRIED : 0;
+		qla2x00_post_async_login_done_work(fcport->vha, fcport,
+			lio->u.logio.data);
+	}
 }
 
 static void
@@ -420,10 +427,11 @@ qla2x00_async_login_done(struct scsi_qla_host *vha, fc_port_t *fcport,
 		if (data[1] & QLA_LOGIO_LOGIN_RETRIED)
 			set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
 		else
-			qla2x00_mark_device_lost(vha, fcport, 1, 0);
+			qla2x00_mark_device_lost(vha, fcport, 1, 1);
 		break;
 	case MBS_PORT_ID_USED:
 		fcport->loop_id = data[1];
+		qla2x00_post_async_logout_work(vha, fcport, NULL);
 		qla2x00_post_async_login_work(vha, fcport, NULL);
 		break;
 	case MBS_LOOP_ID_USED:
@@ -431,7 +439,7 @@ qla2x00_async_login_done(struct scsi_qla_host *vha, fc_port_t *fcport,
 		rval = qla2x00_find_new_loop_id(vha, fcport);
 		if (rval != QLA_SUCCESS) {
 			fcport->flags &= ~FCF_ASYNC_SENT;
-			qla2x00_mark_device_lost(vha, fcport, 1, 0);
+			qla2x00_mark_device_lost(vha, fcport, 1, 1);
 			break;
 		}
 		qla2x00_post_async_login_work(vha, fcport, NULL);
@@ -463,7 +471,7 @@ qla2x00_async_adisc_done(struct scsi_qla_host *vha, fc_port_t *fcport,
 	if (data[1] & QLA_LOGIO_LOGIN_RETRIED)
 		set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
 	else
-		qla2x00_mark_device_lost(vha, fcport, 1, 0);
+		qla2x00_mark_device_lost(vha, fcport, 1, 1);
 
 	return;
 }
diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index bc82ba99f251..912befdceb16 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -949,7 +949,7 @@ qla2x00_mbx_iocb_entry(scsi_qla_host_t *vha, struct req_que *req,
 			fcport->port_type = FCT_TARGET;
 			if (le16_to_cpu(mbx->mb1) & BIT_0)
 				fcport->port_type = FCT_INITIATOR;
-			if (le16_to_cpu(mbx->mb1) & BIT_1)
+			else if (le16_to_cpu(mbx->mb1) & BIT_1)
 				fcport->flags |= FCF_FCP2_DEVICE;
 		}
 		goto logio_done;