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dmaengine: fsl-edma: change to guard(mutex) within fsl_edma3_xlate()

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Introduce a scope guard to automatically unlock the mutex within
fsl_edma3_xlate() to simplify the code.

Prepare to add source ID checks in the future.

Signed-off-by: Joy Zou <joy.zou@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20240701070232.2519179-2-joy.zou@nxp.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Joy Zou 2024-07-01 15:02:31 +08:00 committed by Vinod Koul
parent ae04342b52
commit 90d21f6e57
1 changed files with 1 additions and 4 deletions
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5
drivers/dma/fsl-edma-main.c
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@ -153,7 +153,7 @@ static struct dma_chan *fsl_edma3_xlate(struct of_phandle_args *dma_spec,
b_chmux = !!(fsl_edma->drvdata->flags & FSL_EDMA_DRV_HAS_CHMUX);
mutex_lock(&fsl_edma->fsl_edma_mutex);
guard(mutex)(&fsl_edma->fsl_edma_mutex);
list_for_each_entry_safe(chan, _chan, &fsl_edma->dma_dev.channels,
device_node) {
@ -177,18 +177,15 @@ static struct dma_chan *fsl_edma3_xlate(struct of_phandle_args *dma_spec,
if (!b_chmux && i == dma_spec->args[0]) {
chan = dma_get_slave_channel(chan);
chan->device->privatecnt++;
mutex_unlock(&fsl_edma->fsl_edma_mutex);
return chan;
} else if (b_chmux && !fsl_chan->srcid) {
/* if controller support channel mux, choose a free channel */
chan = dma_get_slave_channel(chan);
chan->device->privatecnt++;
fsl_chan->srcid = dma_spec->args[0];
mutex_unlock(&fsl_edma->fsl_edma_mutex);
return chan;
}
}
mutex_unlock(&fsl_edma->fsl_edma_mutex);
return NULL;
}