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eeprom: validate flash data before using it

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Signed-off-by: Felix Fietkau <[email protected]>
This commit is contained in:
Felix Fietkau
2015-06-13 10:32:46 +02:00
parent 3baa9c2983
commit c772c3bc89
1 changed files with 15 additions and 0 deletions
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eeprom.c
+15
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@@ -41,6 +41,19 @@ mt76_eeprom_get_macaddr(struct mt76_dev *dev)
return 0;
}
static int mt76_check_eeprom(struct mt76_dev *dev, const char *type)
{
u16 val = get_unaligned_le16(dev->eeprom.data);
switch (val) {
case 0x7662:
case 0x7612:
return 0;
default:
printk("%s EEPROM data check failed: %04x\n", type, val);
return -EINVAL;
}
}
static int mt76_get_of_eeprom(struct mt76_dev *dev, int len)
{
int ret = -ENOENT;
@@ -88,6 +101,8 @@ static int mt76_get_of_eeprom(struct mt76_dev *dev, int len)
if (retlen < len)
return -EINVAL;
ret = mt76_check_eeprom(dev, "Flash");
#endif
return ret;
}