From: Vasundhara Volam <vasundhara-v.volam@xxxxxxxxxxxx>
[ Upstream commit dbbfa96ad920c50d58bcaefa57f5f33ceef9d00e ]
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: c0c050c58d84 ("bnxt_en: New Broadcom ethernet driver.")
Signed-off-by: Vasundhara Volam <vasundhara-v.volam@xxxxxxxxxxxx>
Signed-off-by: Michael Chan <michael.chan@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index dcb3f61af7ab0..309b73a665ba2 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -2270,6 +2270,9 @@ static int bnxt_get_nvram_directory(struct net_device *dev, u32 len, u8 *data)
if (rc != 0)
return rc;
+ if (!dir_entries || !entry_length)
+ return -EIO;
+
/* Insert 2 bytes of directory info (count and size of entries) */
if (len < 2)
return -EINVAL;
--
2.25.1
