4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Sudarsana Reddy Kalluru <sudarsana.kalluru@xxxxxxxxxx>
[ Upstream commit 3935a70968820c3994db4de7e6e1c7e814bff875 ]
Avoid calling a SIMD fastpath handler if it is NULL. The check is needed
to handle an unlikely scenario where unsolicited interrupt is destined to
a PF in INTa mode.
Fixes: fe56b9e6a ("qed: Add module with basic common support")
Signed-off-by: Sudarsana Reddy Kalluru <Sudarsana.Kalluru@xxxxxxxxxx>
Signed-off-by: Ariel Elior <ariel.elior@xxxxxxxxxx>
Signed-off-by: Michal Kalderon <Michal.Kalderon@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/qlogic/qed/qed_main.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
--- a/drivers/net/ethernet/qlogic/qed/qed_main.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_main.c
@@ -461,8 +461,16 @@ static irqreturn_t qed_single_int(int ir
/* Fastpath interrupts */
for (j = 0; j < 64; j++) {
if ((0x2ULL << j) & status) {
- hwfn->simd_proto_handler[j].func(
- hwfn->simd_proto_handler[j].token);
+ struct qed_simd_fp_handler *p_handler =
+ &hwfn->simd_proto_handler[j];
+
+ if (p_handler->func)
+ p_handler->func(p_handler->token);
+ else
+ DP_NOTICE(hwfn,
+ "Not calling fastpath handler as it is NULL [handler #%d, status 0x%llx]\n",
+ j, status);
+
status &= ~(0x2ULL << j);
rc = IRQ_HANDLED;
}
