On Sat, May 15, 2021 at 8:22 AM Kalle Valo [off-list ref] wrote:

Arnd Bergmann [off-list ref] writes:

quoted

From: Arnd Bergmann <arnd@arndb.de>

A patch from 2017 changed some accesses to DMA memory to use
get_unaligned_le32() and similar interfaces, to avoid problems
with doing unaligned accesson uncached memory.

However, the change in the mwifiex_pcie_alloc_sleep_cookie_buf()
function ended up changing the size of the access instead,
as it operates on a pointer to u8.

Change this function back to actually access the entire 32 bits.
Note that the pointer is aligned by definition because it came
from dma_alloc_coherent().

Fixes: 92c70a958b0b ("mwifiex: fix for unaligned reads")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Via which tree should this go? I assume it will go via some other tree
so:

Acked-by: Kalle Valo <redacted>

I have queued the series in the asm-generic tree for 5.14, as the patches
that depend on this one are a little too invasive for 5.13 at this point.

If you think this fix should be in 5.13, please take it through your tree.

        Arnd