The code at free_task label in __iscsi_conn_send_pdu can get executed
from blk_timeout_work which takes queue_lock using spin_lock_irq.
back_lock taken with spin_unlock_bh will cause WARN_ON_ONCE.
The code gets executed either with bottom half or IRQ disabled hence
using spin_lock/spin_unlock for back_lock is safe.

Signed-off-by: Jitendra Bhivare <>
 drivers/scsi/libiscsi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index c051694..f9b6fba 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -791,9 +791,9 @@ __iscsi_conn_send_pdu(struct iscsi_conn *conn, struct 
iscsi_hdr *hdr,
        /* regular RX path uses back_lock */
-       spin_lock_bh(&session->back_lock);
+       spin_lock(&session->back_lock);
-       spin_unlock_bh(&session->back_lock);
+       spin_unlock(&session->back_lock);
        return NULL;

To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to
More majordomo info at

Reply via email to