qed: Fix possible system hang in the dcbnl-getdcbx() path.

Orabug: 26783820

qed_dcbnl_get_dcbx() API uses kmalloc in GFT_KERNEL mode. The API gets
invoked in the interrupt context by qed_dcbnl_getdcbx callback. Need
to invoke this kmalloc in atomic mode.

Signed-off-by: Sudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
[ Upstream commit 62289ba27558553871fd047baadaaeda886c6a63 ]
Signed-off-by: Somasundaram Krishnasamy <somasundaram.krishnasamy@oracle.com>

diff --git a/drivers/net/ethernet/qlogic/qed/qed_dcbx.c b/drivers/net/ethernet/qlogic/qed/qed_dcbx.c
index e2699d5a31b52de72fce46d2fde4238a1cfa200e..e87f39fb4a5be2f0f87818cd01359b4daa976723 100644 (file)
--- a/drivers/net/ethernet/qlogic/qed/qed_dcbx.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_dcbx.c
@@ -1262,7 +1262,7 @@ static struct qed_dcbx_get *qed_dcbnl_get_dcbx(struct qed_hwfn *hwfn,
 {
        struct qed_dcbx_get *dcbx_info;
 
-       dcbx_info = kzalloc(sizeof(*dcbx_info), GFP_KERNEL);
+       dcbx_info = kmalloc(sizeof(*dcbx_info), GFP_ATOMIC);
        if (!dcbx_info) 
                return NULL;