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net: netxen: fix a missing check and an uninitialized use 

When netxen_rom_fast_read() fails, "bios" is left uninitialized and may
contain random value, thus should not be used.

The fix ensures that if netxen_rom_fast_read() fails, we return "-EIO".

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kangjie Lu 2018-12-21 00:22:32 -06:00 committed by David S. Miller
parent f0c928d878
commit d134e486e8
1 changed files with 2 additions and 1 deletions
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3
drivers/net/ethernet/qlogic/netxen/netxen_nic_init.c
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@ -1125,7 +1125,8 @@ netxen_validate_firmware(struct netxen_adapter *adapter)
return -EINVAL;
}
val = nx_get_bios_version(adapter);
netxen_rom_fast_read(adapter, NX_BIOS_VERSION_OFFSET, (int *)&bios);
if (netxen_rom_fast_read(adapter, NX_BIOS_VERSION_OFFSET, (int *)&bios))
return -EIO;
if ((__force u32)val != bios) {
dev_err(&pdev->dev, "%s: firmware bios is incompatible\n",
fw_name[fw_type]);