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e1000e: don't return half-read eeprom on error

On a read error, e1000e might have returned uninitialized block of
eeprom data back to userspace. The convention is that 0xff is "empty",
so mark the entire eeprom as empty in case of an error.

Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Kok, Auke 17 vuotta sitten
vanhempi
commit
f227ec3ca2
1 muutettua tiedostoa jossa 5 lisäystä ja 1 poistoa
  1. 5 1
      drivers/net/e1000e/ethtool.c

+ 5 - 1
drivers/net/e1000e/ethtool.c

@@ -494,8 +494,12 @@ static int e1000_get_eeprom(struct net_device *netdev,
 		for (i = 0; i < last_word - first_word + 1; i++) {
 			ret_val = e1000_read_nvm(hw, first_word + i, 1,
 						      &eeprom_buff[i]);
-			if (ret_val)
+			if (ret_val) {
+				/* a read error occurred, throw away the
+				 * result */
+				memset(eeprom_buff, 0xff, sizeof(eeprom_buff));
 				break;
+			}
 		}
 	}