[3.19.y-ckt stable] Patch "qlcnic: fix a timeout loop" has been added to the 3.19.y-ckt tree

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    qlcnic: fix a timeout loop

to the linux-3.19.y-queue branch of the 3.19.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.19.y-queue

This patch is scheduled to be released in version 3.19.8-ckt13.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.19.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

---8<------------------------------------------------------------

>From 54f91a6002f155d027013d48f7bf2710f2397068 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter at oracle.com>
Date: Tue, 15 Dec 2015 16:56:16 +0300
Subject: qlcnic: fix a timeout loop

commit 389e4e04ad2d4887c7bdd7c01a93d3dfa5c14a06 upstream.

The problem here is that at the end of the loop we test for if
idc->vnic_wait_limit is zero, but since idc->vnic_wait_limit-- is a
post-op, it actually ends up set to (u8)-1.  I have fixed this by
moving the decrement inside the loop.

Fixes: 486a5bc77a4a ('qlcnic: Add support for 83xx suspend and resume.')
Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>
Signed-off-by: David S. Miller <davem at davemloft.net>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_vnic.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_vnic.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_vnic.c
index be7d7a6..b1a452f 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_vnic.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_vnic.c
@@ -246,7 +246,8 @@ int qlcnic_83xx_check_vnic_state(struct qlcnic_adapter *adapter)
 	u32 state;

 	state = QLCRDX(ahw, QLC_83XX_VNIC_STATE);
-	while (state != QLCNIC_DEV_NPAR_OPER && idc->vnic_wait_limit--) {
+	while (state != QLCNIC_DEV_NPAR_OPER && idc->vnic_wait_limit) {
+		idc->vnic_wait_limit--;
 		msleep(1000);
 		state = QLCRDX(ahw, QLC_83XX_VNIC_STATE);
 	}
--
1.9.1