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ieee1394: reduce log noise about config ROM CRC errors 

This avoids redundant messages about a special and usually harmless
firmware flaw.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Stefan Richter 2008-05-02 20:14:52 +02:00
parent bce7f793da
commit fde675fa2a
1 changed files with 22 additions and 10 deletions
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32
drivers/ieee1394/csr1212.c
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@ -1049,6 +1049,24 @@ int csr1212_read(struct csr1212_csr *csr, u32 offset, void *buffer, u32 len)
return -ENOENT;
}
/*
* Apparently there are many different wrong implementations of the CRC
* algorithm. We don't fail, we just warn... approximately once per GUID.
*/
static void
csr1212_check_crc(const u32 *buffer, size_t length, u16 crc, __be32 *guid)
{
static u64 last_bad_eui64;
u64 eui64 = ((u64)be32_to_cpu(guid[0]) << 32) | be32_to_cpu(guid[1]);
if (csr1212_crc16(buffer, length) == crc ||
csr1212_msft_crc16(buffer, length) == crc ||
eui64 == last_bad_eui64)
return;
printk(KERN_DEBUG "ieee1394: config ROM CRC error\n");
last_bad_eui64 = eui64;
}
/* Parse a chunk of data as a Config ROM */
@ -1092,11 +1110,8 @@ static int csr1212_parse_bus_info_block(struct csr1212_csr *csr)
return ret;
}
/* Apparently there are many different wrong implementations of the CRC
* algorithm. We don't fail, we just warn. */
if ((csr1212_crc16(bi->data, bi->crc_length) != bi->crc) &&
(csr1212_msft_crc16(bi->data, bi->crc_length) != bi->crc))
printk(KERN_DEBUG "IEEE 1394 device has ROM CRC error\n");
csr1212_check_crc(bi->data, bi->crc_length, bi->crc,
&csr->bus_info_data[3]);
cr = CSR1212_MALLOC(sizeof(*cr));
if (!cr)
@ -1205,11 +1220,8 @@ int csr1212_parse_keyval(struct csr1212_keyval *kv,
&cache->data[bytes_to_quads(kv->offset - cache->offset)];
kvi_len = be16_to_cpu(kvi->length);
/* Apparently there are many different wrong implementations of the CRC
* algorithm. We don't fail, we just warn. */
if ((csr1212_crc16(kvi->data, kvi_len) != kvi->crc) &&
(csr1212_msft_crc16(kvi->data, kvi_len) != kvi->crc))
printk(KERN_DEBUG "IEEE 1394 device has ROM CRC error\n");
/* GUID is wrong in here in case of extended ROM. We don't care. */
csr1212_check_crc(kvi->data, kvi_len, kvi->crc, &cache->data[3]);
switch (kv->key.type) {
case CSR1212_KV_TYPE_DIRECTORY: