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 33cf952cc01d..b2de8d03c5fa 100644 --- a/drivers/net/wireless/marvell/mwifiex/pcie.c +++ b/drivers/net/wireless/marvell/mwifiex/pcie.c @@ -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; }