diff options
Diffstat (limited to 'drivers/net/wireless/brcm80211/brcmsmac/srom.c')
| -rw-r--r-- | drivers/net/wireless/brcm80211/brcmsmac/srom.c | 31 |
1 files changed, 20 insertions, 11 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmsmac/srom.c b/drivers/net/wireless/brcm80211/brcmsmac/srom.c index 61092156755e..563743643038 100644 --- a/drivers/net/wireless/brcm80211/brcmsmac/srom.c +++ b/drivers/net/wireless/brcm80211/brcmsmac/srom.c @@ -764,6 +764,22 @@ _initvars_srom_pci(u8 sromrev, u16 *srom, struct list_head *var_list) } /* + * The crc check is done on a little-endian array, we need + * to switch the bytes around before checking crc (and + * then switch it back). + */ +static int do_crc_check(u16 *buf, unsigned nwords) +{ + u8 crc; + + cpu_to_le16_buf(buf, nwords); + crc = crc8(brcms_srom_crc8_table, (void *)buf, nwords << 1, CRC8_INIT_VALUE); + le16_to_cpu_buf(buf, nwords); + + return crc == CRC8_GOOD_VALUE(brcms_srom_crc8_table); +} + +/* * Read in and validate sprom. * Return 0 on success, nonzero on error. */ @@ -772,8 +788,6 @@ sprom_read_pci(struct si_pub *sih, u16 *buf, uint nwords, bool check_crc) { int err = 0; uint i; - u8 *bbuf = (u8 *)buf; /* byte buffer */ - uint nbytes = nwords << 1; struct bcma_device *core; uint sprom_offset; @@ -786,9 +800,9 @@ sprom_read_pci(struct si_pub *sih, u16 *buf, uint nwords, bool check_crc) sprom_offset = CHIPCREGOFFS(sromotp); } - /* read the sprom in bytes */ - for (i = 0; i < nbytes; i++) - bbuf[i] = bcma_read8(core, sprom_offset+i); + /* read the sprom */ + for (i = 0; i < nwords; i++) + buf[i] = bcma_read16(core, sprom_offset+i*2); if (buf[0] == 0xffff) /* @@ -798,13 +812,8 @@ sprom_read_pci(struct si_pub *sih, u16 *buf, uint nwords, bool check_crc) */ return -ENODATA; - if (check_crc && - crc8(brcms_srom_crc8_table, bbuf, nbytes, CRC8_INIT_VALUE) != - CRC8_GOOD_VALUE(brcms_srom_crc8_table)) + if (check_crc && !do_crc_check(buf, nwords)) err = -EIO; - else - /* now correct the endianness of the byte array */ - le16_to_cpu_buf(buf, nwords); return err; } |