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| author | Frank Li <Frank.Li@nxp.com> | 2024-03-23 11:34:51 -0400 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2024-04-07 17:20:00 +0530 |
| commit | 6aa60f79e6794bbbc571ea4e0501b9fcc26026e2 (patch) | |
| tree | 43344a3fbcb1744224ea76f99d5de778452518cc | |
| parent | cee8cbfc7be8ff9f3ccf258134f9ab2c273abb75 (diff) | |
| download | linux-stable-6aa60f79e6794bbbc571ea4e0501b9fcc26026e2.tar.gz linux-stable-6aa60f79e6794bbbc571ea4e0501b9fcc26026e2.tar.bz2 linux-stable-6aa60f79e6794bbbc571ea4e0501b9fcc26026e2.zip | |
dmaengine: fsl-edma: add safety check for 'srcid'
Ensure that 'srcid' is a non-zero value to avoid dtb passing invalid
'srcid' to the driver.
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20240323-8ulp_edma-v3-2-c0e981027c05@nxp.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
| -rw-r--r-- | drivers/dma/fsl-edma-main.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/dma/fsl-edma-main.c b/drivers/dma/fsl-edma-main.c index 0a6e0c404027..2148a7f1ae84 100644 --- a/drivers/dma/fsl-edma-main.c +++ b/drivers/dma/fsl-edma-main.c @@ -115,6 +115,13 @@ static struct dma_chan *fsl_edma_xlate(struct of_phandle_args *dma_spec, chan->device->privatecnt++; fsl_chan = to_fsl_edma_chan(chan); fsl_chan->srcid = dma_spec->args[1]; + + if (!fsl_chan->srcid) { + dev_err(&fsl_chan->pdev->dev, "Invalidate srcid %d\n", + fsl_chan->srcid); + return NULL; + } + fsl_edma_chan_mux(fsl_chan, fsl_chan->srcid, true); mutex_unlock(&fsl_edma->fsl_edma_mutex); |