diff options
| author | Aaro Koskinen <[email protected]> | 2016-03-17 14:17:20 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2016-03-17 15:09:34 -0700 |
| commit | 4c11e554fb894b381a3dc47069259d87a2e6ffc9 (patch) | |
| tree | 8cf84ad94329f3662c59de98c6ddbd7aca472ac0 | |
| parent | b0f84ac352762ed02d7ea9f284942a8cab7f9077 (diff) | |
drivers/firmware/broadcom/bcm47xx_nvram.c: fix incorrect __ioread32_copy
Commit 1f330c327900 ("drivers/firmware/broadcom/bcm47xx_nvram.c: use
__ioread32_copy() instead of open-coding") switched to use a generic
copy function, but failed to notice that the header pointer is updated
between the two copies, resulting in bogus data being copied in the
latter one. Fix by keeping the old header pointer.
The patch fixes totally broken networking on WRT54GL router (both LAN and
WLAN interfaces fail to probe).
Fixes: 1f330c327900 ("drivers/firmware/broadcom/bcm47xx_nvram.c: use __ioread32_copy() instead of open-coding")
Signed-off-by: Aaro Koskinen <[email protected]>
Reviewed-by: Stephen Boyd <[email protected]>
Cc: Rafal Milecki <[email protected]>
Cc: Hauke Mehrtens <[email protected]>
Cc: <[email protected]> [4.4.x]
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | drivers/firmware/broadcom/bcm47xx_nvram.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/firmware/broadcom/bcm47xx_nvram.c b/drivers/firmware/broadcom/bcm47xx_nvram.c index 0c2f0a61b0ea..0b631e5b5b84 100644 --- a/drivers/firmware/broadcom/bcm47xx_nvram.c +++ b/drivers/firmware/broadcom/bcm47xx_nvram.c @@ -94,15 +94,14 @@ static int nvram_find_and_copy(void __iomem *iobase, u32 lim) found: __ioread32_copy(nvram_buf, header, sizeof(*header) / 4); - header = (struct nvram_header *)nvram_buf; - nvram_len = header->len; + nvram_len = ((struct nvram_header *)(nvram_buf))->len; if (nvram_len > size) { pr_err("The nvram size according to the header seems to be bigger than the partition on flash\n"); nvram_len = size; } if (nvram_len >= NVRAM_SPACE) { pr_err("nvram on flash (%i bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n", - header->len, NVRAM_SPACE - 1); + nvram_len, NVRAM_SPACE - 1); nvram_len = NVRAM_SPACE - 1; } /* proceed reading data after header */ |