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sfc: falcon: Check null pointer of rx_queue->page_ring

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[ Upstream commit 9b8bdd1eb5890aeeab7391dddcf8bd51f7b07216 ]

Because of the possible failure of the kcalloc, it should be better to
set rx_queue->page_ptr_mask to 0 when it happens in order to maintain
the consistency.

Fixes: 5a6681e22c ("sfc: separate out SFC4000 ("Falcon") support into new sfc-falcon driver")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Acked-by: Martin Habets <habetsm.xilinx@gmail.com>
Link: https://lore.kernel.org/r/20211220140344.978408-1-jiasheng@iscas.ac.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jiasheng Jiang
2021-12-20 22:03:44 +08:00
committed by Greg Kroah-Hartman
parent d70b4001ef
commit 2792fde84c
1 changed files with 4 additions and 1 deletions
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3
drivers/net/ethernet/sfc/falcon/rx.c
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@@ -728,6 +728,9 @@ static void ef4_init_rx_recycle_ring(struct ef4_nic *efx,
efx->rx_bufs_per_page); efx->rx_bufs_per_page);
rx_queue->page_ring = kcalloc(page_ring_size, rx_queue->page_ring = kcalloc(page_ring_size,
sizeof(*rx_queue->page_ring), GFP_KERNEL); sizeof(*rx_queue->page_ring), GFP_KERNEL);
if (!rx_queue->page_ring)
rx_queue->page_ptr_mask = 0;
else
rx_queue->page_ptr_mask = page_ring_size - 1; rx_queue->page_ptr_mask = page_ring_size - 1;
} }