1 files changed, 21 insertions, 4 deletions

diff --git a/drivers/net/wireless/p54/eeprom.c b/drivers/net/wireless/p54/eeprom.c
index 78347041ec40..35b09aa0529b 100644
--- a/drivers/net/wireless/p54/eeprom.c
+++ b/drivers/net/wireless/p54/eeprom.c
@@ -23,6 +23,7 @@
 #include <linux/slab.h>
 
 #include <net/mac80211.h>
+#include <linux/crc-ccitt.h>
 
 #include "p54.h"
 #include "eeprom.h"
@@ -260,8 +261,10 @@ static int p54_generate_channel_lists(struct ieee80211_hw *dev)
         list->max_entries = max_channel_num;
         list->channels = kzalloc(sizeof(struct p54_channel_entry) *
                                  max_channel_num, GFP_KERNEL);
-        if (!list->channels)
+        if (!list->channels) {
+                ret = -ENOMEM;
                 goto free;
+        }
 
         for (i = 0; i < max_channel_num; i++) {
                 if (i < priv->iq_autocal_len) {
@@ -540,6 +543,7 @@ int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
         int err;
         u8 *end = (u8 *)eeprom + len;
         u16 synth = 0;
+        u16 crc16 = ~0;
 
         wrap = (struct eeprom_pda_wrap *) eeprom;
         entry = (void *)wrap->data + le16_to_cpu(wrap->len);
@@ -655,16 +659,29 @@ int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
                         }
                         break;
                 case PDR_END:
-                        /* make it overrun */
-                        entry_len = len;
+                        crc16 = ~crc_ccitt(crc16, (u8 *) entry, sizeof(*entry));
+                        if (crc16 != le16_to_cpup((__le16 *)entry->data)) {
+                                wiphy_err(dev->wiphy, "eeprom failed checksum "
+                                         "test!\n");
+                                err = -ENOMSG;
+                                goto err;
+                        } else {
+                                goto good_eeprom;
+                        }
                         break;
                 default:
                         break;
                 }
 
-                entry = (void *)entry + (entry_len + 1)*2;
+                crc16 = crc_ccitt(crc16, (u8 *)entry, (entry_len + 1) * 2);
+                entry = (void *)entry + (entry_len + 1) * 2;
         }
 
+        wiphy_err(dev->wiphy, "unexpected end of eeprom data.\n");
+        err = -ENODATA;
+        goto err;
+
+good_eeprom:
         if (!synth || !priv->iq_autocal || !priv->output_limit ||
             !priv->curve_data) {
                 wiphy_err(dev->wiphy,