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[media] em28xx: do not interpret eeprom content if eeprom key is invalid

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If the eeprom key isn't valid, either a different (currently unknown) format
is used or the eeprom is corrupted.
In both cases it doesn't make sense to interpret the data.
Also print an error message.

Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Frank Schaefer 2013-03-03 15:37:37 -03:00 committed by Mauro Carvalho Chehab
parent d90f067713
commit f55eacbe74
1 changed files with 6 additions and 2 deletions
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8
drivers/media/usb/em28xx/em28xx-i2c.c
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@ -434,8 +434,12 @@ static int em28xx_i2c_eeprom(struct em28xx *dev, unsigned char *eedata, int len)
printk("\n");
}
if (em_eeprom->id == 0x9567eb1a)
dev->hash = em28xx_hash_mem(eedata, len, 32);
if (em_eeprom->id != 0x9567eb1a) {
em28xx_errdev("Unknown eeprom type or eeprom corrupted !");
return -ENODEV;
}
dev->hash = em28xx_hash_mem(eedata, len, 32);
em28xx_info("EEPROM ID = 0x%08x, EEPROM hash = 0x%08lx\n",
em_eeprom->id, dev->hash);