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bnxt_en: Check for zero dir entries in NVRAM.

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If firmware goes into unstable state, HWRM_NVM_GET_DIR_INFO firmware
command may return zero dir entries. Return error in such case to
avoid zero length dma buffer request.

Fixes: c0c050c58d ("bnxt_en: New Broadcom ethernet driver.")
Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vasundhara Volam 2020-08-26 01:08:33 -04:00 committed by David S. Miller
parent c1c2d77408
commit dbbfa96ad9
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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@ -2323,6 +2323,9 @@ static int bnxt_get_nvram_directory(struct net_device *dev, u32 len, u8 *data)
if (rc != 0) if (rc != 0)
return rc; return rc;
if (!dir_entries || !entry_length)
return -EIO;
/* Insert 2 bytes of directory info (count and size of entries) */ /* Insert 2 bytes of directory info (count and size of entries) */
if (len < 2) if (len < 2)
return -EINVAL; return -EINVAL;