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sfc: Check null pointer of rx_queue->page_ring
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/20211220135603.954944-1-jiasheng@iscas.ac.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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1 changed files with 4 additions and 1 deletions
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@ -150,7 +150,10 @@ static void efx_init_rx_recycle_ring(struct efx_rx_queue *rx_queue)
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efx->rx_bufs_per_page);
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rx_queue->page_ring = kcalloc(page_ring_size,
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sizeof(*rx_queue->page_ring), GFP_KERNEL);
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rx_queue->page_ptr_mask = page_ring_size - 1;
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if (!rx_queue->page_ring)
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rx_queue->page_ptr_mask = 0;
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else
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rx_queue->page_ptr_mask = page_ring_size - 1;
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}
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static void efx_fini_rx_recycle_ring(struct efx_rx_queue *rx_queue)
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