From: Larry.Finger@lwfinger.net Date: Sat, 19 Apr 2008 14:24:09 +0000 (+0200) Subject: ssb: Allow reading of 440-byte SPROM that is not rev 4 X-Git-Tag: v2.6.27-rc1~969^2~517 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=2afc49015db927fea7bc6ca33c0a60bf5d7c2c5f;p=linux-2.6-omap-h63xx.git ssb: Allow reading of 440-byte SPROM that is not rev 4 The current code checks for the special signature that signifies a revision 4 SPROM. Now that a rev. 8 SPROM with a 440-byte length has been found that may not have any special code, this check could be relaxed. With this patch, if the CRC is incorrect for a 256-byte SPROM, the code will immediately check for a 440-byte SPROM. If there is still a CRC error, the size is set to 440 bytes, which allows dumping of most of any 512-byte SPROM if one is encountered. Signed-off-by: Larry Finger Signed-off-by: Michael Buesch Signed-off-by: John W. Linville --- diff --git a/drivers/ssb/pci.c b/drivers/ssb/pci.c index 57c4ccfab1e..f883dcfffe0 100644 --- a/drivers/ssb/pci.c +++ b/drivers/ssb/pci.c @@ -510,17 +510,15 @@ static int ssb_pci_sprom_get(struct ssb_bus *bus, sprom_do_read(bus, buf); err = sprom_check_crc(buf, bus->sprom_size); if (err) { - /* check for rev 4 sprom - has special signature */ - if (buf[32] == 0x5372) { - kfree(buf); - buf = kcalloc(SSB_SPROMSIZE_WORDS_R4, sizeof(u16), - GFP_KERNEL); - if (!buf) - goto out; - bus->sprom_size = SSB_SPROMSIZE_WORDS_R4; - sprom_do_read(bus, buf); - err = sprom_check_crc(buf, bus->sprom_size); - } + /* try for a 440 byte SPROM - revision 4 and higher */ + kfree(buf); + buf = kcalloc(SSB_SPROMSIZE_WORDS_R4, sizeof(u16), + GFP_KERNEL); + if (!buf) + goto out; + bus->sprom_size = SSB_SPROMSIZE_WORDS_R4; + sprom_do_read(bus, buf); + err = sprom_check_crc(buf, bus->sprom_size); if (err) ssb_printk(KERN_WARNING PFX "WARNING: Invalid" " SPROM CRC (corrupt SPROM)\n");