tg3: fix return value check in tg3_read_vpd()

Besides -ETIMEDOUT and -EINTR, pci_read_vpd may return other error
values like -ENODEV or -EINVAL which are ignored due to the buggy
check, but the data are not read from VPD anyway and this is checked
subsequently with at most 3 needless loop iterations. This does not
show up as a runtime bug.

CC: Matt Carlson <mcarlson@broadcom.com>
CC: Michael Chan <mchan@broadcom.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 30ccbb6..6f97b7b 100644 (file)
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -12658,7 +12658,7 @@ static void __devinit tg3_read_vpd(struct tg3 *tp)
                        cnt = pci_read_vpd(tp->pdev, pos,
                                           TG3_NVM_VPD_LEN - pos,
                                           &vpd_data[pos]);
-                       if (cnt == -ETIMEDOUT || -EINTR)
+                       if (cnt == -ETIMEDOUT || cnt == -EINTR)
                                cnt = 0;
                        else if (cnt < 0)
                                goto out_not_found;