| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.19 166/421] mwifiex: re-fix for unaligned accesses | Date | Mon, 19 Jul 2021 16:49:37 +0200 |
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From: Arnd Bergmann <arnd@arndb.de>
[ 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: 92c70a958b0b ("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> --- drivers/net/wireless/marvell/mwifiex/pcie.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-)
diff --git a/drivers/net/wireless/marvell/mwifiex/pcie.c b/drivers/net/wireless/marvell/mwifiex/pcie.c index 5907b34037c2..2f0141c964e2 100644 --- a/drivers/net/wireless/marvell/mwifiex/pcie.c +++ b/drivers/net/wireless/marvell/mwifiex/pcie.c @@ -1084,7 +1084,7 @@ 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 = pci_alloc_consistent(card->dev, sizeof(u32), &card->sleep_cookie_pbase); @@ -1093,13 +1093,11 @@ static int mwifiex_pcie_alloc_sleep_cookie_buf(struct mwifiex_adapter *adapter) "pci_alloc_consistent 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; } -- 2.30.2
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