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mwifiex: re-fix for unaligned accesses

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[ Upstream commit 8f4e3d48bb50765ab27ae5bebed2595b20de80a1 ]

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: 92c70a958b ("mwifiex: fix for unaligned reads")
Acked-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Arnd Bergmann
2021-05-08 00:07:55 +02:00
committed by Greg Kroah-Hartman
parent 460bee9009
commit 67d88b7bf6
1 changed files with 4 additions and 6 deletions
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10
drivers/net/wireless/marvell/mwifiex/pcie.c
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@@ -1232,7 +1232,7 @@ static int mwifiex_pcie_delete_cmdrsp_buf(struct mwifiex_adapter *adapter)
static int mwifiex_pcie_alloc_sleep_cookie_buf(struct mwifiex_adapter *adapter)
{
struct pcie_service_card *card = adapter->card;
u32 tmp;
u32 *cookie;
card->sleep_cookie_vbase = dma_alloc_coherent(&card->dev->dev,
sizeof(u32),
@@ -1243,13 +1243,11 @@ static int mwifiex_pcie_alloc_sleep_cookie_buf(struct mwifiex_adapter *adapter)
"dma_alloc_coherent failed!\n");
return -ENOMEM;
}
cookie = (u32 *)card->sleep_cookie_vbase;
/* Init val of Sleep Cookie */
tmp = FW_AWAKE_COOKIE;
put_unaligned(tmp, card->sleep_cookie_vbase);
*cookie = FW_AWAKE_COOKIE;
mwifiex_dbg(adapter, INFO,
"alloc_scook: sleep cookie=0x%x\n",
get_unaligned(card->sleep_cookie_vbase));
mwifiex_dbg(adapter, INFO, "alloc_scook: sleep cookie=0x%x\n", *cookie);
return 0;
}