From 55e3299d9eca01fb2351c5d37e222872b7c6e0af Mon Sep 17 00:00:00 2001
From: Mike Christie <michaelc@cs.wisc.edu>
Date: Fri, 13 Jan 2006 18:05:53 -0600
Subject: [PATCH] [SCSI] iscsi: fix 4k stack iscsi setups
When we run the xmit code from queuecomand the stack trace
gets too deep. The patch runs the xmit code from the scsi_host
work queue. This fixes 4k stack and xfs support and should
fix the st and sg stack usage bugs.
Signed-off-by: Alex Aizman <itn780@yahoo.com>
Signed-off-by: Dmitry Yusupov <dmitry_yus@yahoo.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
---
drivers/scsi/iscsi_tcp.c | 19 +++++--------------
drivers/scsi/scsi_transport_iscsi.c | 1 +
2 files changed, 6 insertions(+), 14 deletions(-)
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index e31d350e6b67..4e4b1061a5e9 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -525,7 +525,7 @@ iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
__kfifo_put(ctask->r2tqueue, (void*)&r2t, sizeof(void*));
__kfifo_put(conn->writequeue, (void*)&ctask, sizeof(void*));
- schedule_work(&conn->xmitwork);
+ scsi_queue_work(session->host, &conn->xmitwork);
conn->r2t_pdus_cnt++;
spin_unlock(&session->lock);
@@ -1267,7 +1267,7 @@ iscsi_write_space(struct sock *sk)
conn->old_write_space(sk);
debug_tcp("iscsi_write_space: cid %d\n", conn->id);
clear_bit(SUSPEND_BIT, &conn->suspend_tx);
- schedule_work(&conn->xmitwork);
+ scsi_queue_work(conn->session->host, &conn->xmitwork);
}
static void
@@ -2275,7 +2275,7 @@ iscsi_xmitworker(void *data)
*/
mutex_lock(&conn->xmitmutex);
if (iscsi_data_xmit(conn))
- schedule_work(&conn->xmitwork);
+ scsi_queue_work(conn->session->host, &conn->xmitwork);
mutex_unlock(&conn->xmitmutex);
}
@@ -2340,15 +2340,7 @@ iscsi_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
session->cmdsn, session->max_cmdsn - session->exp_cmdsn + 1);
spin_unlock(&session->lock);
- if (!in_interrupt() && mutex_trylock(&conn->xmitmutex)) {
- spin_unlock_irq(host->host_lock);
- if (iscsi_data_xmit(conn))
- schedule_work(&conn->xmitwork);
- mutex_unlock(&conn->xmitmutex);
- spin_lock_irq(host->host_lock);
- } else
- schedule_work(&conn->xmitwork);
-
+ scsi_queue_work(host, &conn->xmitwork);
return 0;
reject:
@@ -2942,8 +2934,7 @@ iscsi_conn_send_generic(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
else
__kfifo_put(conn->mgmtqueue, (void*)&mtask, sizeof(void*));
- schedule_work(&conn->xmitwork);
-
+ scsi_queue_work(session->host, &conn->xmitwork);
return 0;
}
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index 45e31635a595..59a1c9d9d3bd 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -379,6 +379,7 @@ iscsi_transport_create_session(struct scsi_transport_template *scsit,
shost->max_lun = transport->max_lun;
shost->max_cmd_len = transport->max_cmd_len;
shost->transportt = scsit;
+ shost->transportt->create_work_queue = 1;
if (scsi_add_host(shost, NULL))
goto free_host;
--
2.20.1