[PATCH 4.4 77/96] net: 3com: typhoon: typhoon_init_one: fix incorrect return values

Greg Kroah-Hartman
2017-11-28T10:23:26Z

From: Thomas Preisner <thomas.preisner+linux@fau.de>

[ Upstream commit 107fded7bf616ad6f46823d98b8ed6405d7adf2d ]

In a few cases the err-variable is not set to a negative error code if a
function call in typhoon_init_one() fails and thus 0 is returned
instead.
It may be better to set err to the appropriate negative error
code before returning.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=188841

Reported-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: Thomas Preisner <thomas.preisner+linux@fau.de>
Signed-off-by: Milan Stephan <milan.stephan+linux@fau.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/ethernet/3com/typhoon.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)

--- a/drivers/net/ethernet/3com/typhoon.c
+++ b/drivers/net/ethernet/3com/typhoon.c
@@ -2398,8 +2398,9 @@ typhoon_init_one(struct pci_dev *pdev, c
*(__be16 *)&dev->dev_addr[0] = htons(le16_to_cpu(xp_resp[0].parm1));
*(__be32 *)&dev->dev_addr[2] = htonl(le32_to_cpu(xp_resp[0].parm2));

- if(!is_valid_ether_addr(dev->dev_addr)) {
+ if (!is_valid_ether_addr(dev->dev_addr)) {
err_msg = "Could not obtain valid ethernet address, aborting";
+ err = -EIO;
goto error_out_reset;
}

@@ -2407,7 +2408,8 @@ typhoon_init_one(struct pci_dev *pdev, c
* later when we print out the version reported.
*/
INIT_COMMAND_WITH_RESPONSE(&xp_cmd, TYPHOON_CMD_READ_VERSIONS);
- if(typhoon_issue_command(tp, 1, &xp_cmd, 3, xp_resp) < 0) {
+ err = typhoon_issue_command(tp, 1, &xp_cmd, 3, xp_resp);
+ if (err < 0) {
err_msg = "Could not get Sleep Image version";
goto error_out_reset;
}
@@ -2449,7 +2451,8 @@ typhoon_init_one(struct pci_dev *pdev, c
dev->features = dev->hw_features |
NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_RXCSUM;

- if(register_netdev(dev) < 0) {
+ err = register_netdev(dev);
+ if (err < 0) {
err_msg = "unable to register netdev";
goto error_out_reset;
}