[PATCH 3.16.y-ckt 091/128] qlcnic: fix a timeout loop

From: Luis Henriques
Date: Sun Jan 24 2016 - 17:16:43 EST

3.16.7-ckt23 -stable review patch. If anyone has any objections, please let me know.


From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

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@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
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 be7d7a62cc0d..b1a452f291ee 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--;
state = QLCRDX(ahw, QLC_83XX_VNIC_STATE);