igb: limit EEPROM access

EEPROM access beyond the base eeprom page is unsupported.

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/net/igb/e1000_82575.c b/drivers/net/igb/e1000_82575.c
index cda3ec879090..39d44dc072e9 100644
--- a/drivers/net/igb/e1000_82575.c
+++ b/drivers/net/igb/e1000_82575.c
@@ -171,6 +171,10 @@ static s32 igb_get_invariants_82575(struct e1000_hw *hw)
          * for setting word_size.
          */
         size += NVM_WORD_SIZE_BASE_SHIFT;
+
+        /* EEPROM access above 16k is unsupported */
+        if (size > 14)
+                size = 14;
         nvm->word_size = 1 << size;
 
         /* setup PHY parameters */