diff options
| author | Mike Christie <michaelc@cs.wisc.edu> | 2010-12-31 11:22:22 +0300 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2010-12-31 18:53:09 +0300 |
| commit | bfcf72e4426da2fd8f8081a641385ffc3ccc2282 (patch) | |
| tree | b471c73b7e31ef6a0be649ecab96ad2a8798cbe2 /drivers/scsi | |
| parent | f41d472179a0d7c8e8160c85180ab1124947068e (diff) | |
| download | linux-bfcf72e4426da2fd8f8081a641385ffc3ccc2282.tar.xz | |
[SCSI] libiscsi: use bh locking instead of irq with session lock
The session lock is taken in threads, timers, and bottom halves
like softirqs and tasklets. All the code but
iscsi_conn/session_failure take the session lock with the spin_lock_bh
call. This was done because I thought some offload drivers
would be calling these functions from a irq. They never did,
so this patch has iscsi_conn/session_failure use the bh
locking.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/libiscsi.c | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c index 1def8e101249..da8b61543ee4 100644 --- a/drivers/scsi/libiscsi.c +++ b/drivers/scsi/libiscsi.c @@ -1338,17 +1338,16 @@ void iscsi_session_failure(struct iscsi_session *session, { struct iscsi_conn *conn; struct device *dev; - unsigned long flags; - spin_lock_irqsave(&session->lock, flags); + spin_lock_bh(&session->lock); conn = session->leadconn; if (session->state == ISCSI_STATE_TERMINATE || !conn) { - spin_unlock_irqrestore(&session->lock, flags); + spin_unlock_bh(&session->lock); return; } dev = get_device(&conn->cls_conn->dev); - spin_unlock_irqrestore(&session->lock, flags); + spin_unlock_bh(&session->lock); if (!dev) return; /* @@ -1367,17 +1366,16 @@ EXPORT_SYMBOL_GPL(iscsi_session_failure); void iscsi_conn_failure(struct iscsi_conn *conn, enum iscsi_err err) { struct iscsi_session *session = conn->session; - unsigned long flags; - spin_lock_irqsave(&session->lock, flags); + spin_lock_bh(&session->lock); if (session->state == ISCSI_STATE_FAILED) { - spin_unlock_irqrestore(&session->lock, flags); + spin_unlock_bh(&session->lock); return; } if (conn->stop_stage == 0) session->state = ISCSI_STATE_FAILED; - spin_unlock_irqrestore(&session->lock, flags); + spin_unlock_bh(&session->lock); set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx); set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx); |