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bnxt_en: Check for zero length value in bnxt_get_nvram_item().

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Return -EINVAL if the length is zero and not proceed to do essentially
nothing.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Chan 2017-10-26 11:51:22 -04:00 committed by David S. Miller
parent 618784e3ee
commit e0ad8fc598
1 changed files with 3 additions and 0 deletions
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3
drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
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@ -1773,6 +1773,9 @@ static int bnxt_get_nvram_item(struct net_device *dev, u32 index, u32 offset,
dma_addr_t dma_handle;
struct hwrm_nvm_read_input req = {0};
if (!length)
return -EINVAL;
buf = dma_alloc_coherent(&bp->pdev->dev, length, &dma_handle,
GFP_KERNEL);
if (!buf) {