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| author | Nathan Chancellor <nathan@kernel.org> | 2023-12-22 11:06:45 -0700 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2024-01-19 17:04:02 +0530 |
| commit | 620a7e4c1f03a84e10c8c3fa0ae1aab03ef84294 (patch) | |
| tree | a91fbb6f7c1850f74914c47f2d6ca2c361469e7f | |
| parent | fe0d495e759cee0dbfff4348b5791f21b6f56655 (diff) | |
| download | sysctl-620a7e4c1f03a84e10c8c3fa0ae1aab03ef84294.tar.gz | |
dmaengine: xilinx: xdma: Fix initialization location of desc in xdma_channel_isr()
Clang warns (or errors with CONFIG_WERROR=y):
drivers/dma/xilinx/xdma.c:894:3: error: variable 'desc' is uninitialized when used here [-Werror,-Wuninitialized]
894 | desc->error = true;
| ^~~~
The initialization of desc was moved too far forward, move it back so
that this assignment does not result in a potential crash at runtime
while clearing up the warning.
Closes: https://github.com/ClangBuiltLinux/linux/issues/1972
Fixes: 2f8f90cd2f8d ("dmaengine: xilinx: xdma: Implement interleaved DMA transfers")
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20231222-dma-xilinx-xdma-clang-fixes-v1-2-84a18ff184d2@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
| -rw-r--r-- | drivers/dma/xilinx/xdma.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/dma/xilinx/xdma.c b/drivers/dma/xilinx/xdma.c index d5b9fc3fd955b7..ee595d1ebc63e2 100644 --- a/drivers/dma/xilinx/xdma.c +++ b/drivers/dma/xilinx/xdma.c @@ -888,6 +888,8 @@ static irqreturn_t xdma_channel_isr(int irq, void *dev_id) if (ret) goto out; + desc = to_xdma_desc(vd); + st &= XDMA_CHAN_STATUS_MASK; if ((st & XDMA_CHAN_ERROR_MASK) || !(st & (CHAN_CTRL_IE_DESC_COMPLETED | CHAN_CTRL_IE_DESC_STOPPED))) { @@ -901,7 +903,6 @@ static irqreturn_t xdma_channel_isr(int irq, void *dev_id) if (ret) goto out; - desc = to_xdma_desc(vd); if (desc->interleaved_dma) { xchan->busy = false; desc->completed_desc_num += complete_desc_num; |