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| author | Amelie Delaunay <amelie.delaunay@foss.st.com> | 2021-10-11 11:42:58 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-11-17 11:04:35 +0100 |
| commit | 0adbe4155e0b2d80fb36385b8b5a771b6bfad2e0 (patch) | |
| tree | f5ca99870411e74d14aedaae261e0518f66f453d /drivers/dma | |
| parent | ca3b5c9765408eda971a52ef9d0b38e7fb276dbc (diff) | |
dmaengine: stm32-dma: fix stm32_dma_get_max_width
[ Upstream commit b20fd5fa310cbf7ec367f263a34382a24c4cee73 ]
buf_addr parameter of stm32_dma_set_xfer_param function is a dma_addr_t.
We only need to check the remainder of buf_addr/max_width, so, no need to
use do_div and extra u64 addr. Use '%' instead.
Fixes: e0ebdbdcb42a ("dmaengine: stm32-dma: take address into account when computing max width")
Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com>
Link: https://lore.kernel.org/r/20211011094259.315023-3-amelie.delaunay@foss.st.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/stm32-dma.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/dma/stm32-dma.c b/drivers/dma/stm32-dma.c index 7dd1d3d0bf06..a5dab5510e62 100644 --- a/drivers/dma/stm32-dma.c +++ b/drivers/dma/stm32-dma.c @@ -268,7 +268,6 @@ static enum dma_slave_buswidth stm32_dma_get_max_width(u32 buf_len, u32 threshold) { enum dma_slave_buswidth max_width; - u64 addr = buf_addr; if (threshold == STM32_DMA_FIFO_THRESHOLD_FULL) max_width = DMA_SLAVE_BUSWIDTH_4_BYTES; @@ -279,7 +278,7 @@ static enum dma_slave_buswidth stm32_dma_get_max_width(u32 buf_len, max_width > DMA_SLAVE_BUSWIDTH_1_BYTE) max_width = max_width >> 1; - if (do_div(addr, max_width)) + if (buf_addr % max_width) max_width = DMA_SLAVE_BUSWIDTH_1_BYTE; return max_width; |