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

[ Upstream commit 62289ba27558553871fd047baadaaeda886c6a63 ]

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>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/qlogic/qed/qed_dcbx.c b/drivers/net/ethernet/qlogic/qed/qed_dcbx.c
index a4789a9..9d59cb8 100644 (file)
--- a/drivers/net/ethernet/qlogic/qed/qed_dcbx.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_dcbx.c
@@ -1222,7 +1222,7 @@ 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;