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Subject[PATCH 4.9 064/104] qed: Fix possible system hang in the dcbnl-getdcbx() path.
Date
4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: "sudarsana.kalluru@cavium.com" <sudarsana.kalluru@cavium.com>


[ 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>
---
drivers/net/ethernet/qlogic/qed/qed_dcbx.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- 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_ge
{
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;


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