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authorFrank Li <Frank.Li@nxp.com>2023-10-04 17:29:11 +0300
committerVinod Koul <vkoul@kernel.org>2023-10-09 08:42:19 +0300
commit3fa53518ad419bfacceae046a9d8027e4c4c5290 (patch)
tree78741d5705e70987bce7178e5e0339ac427b42f9 /drivers
parent67e13e89742c3b21ce177f612bf9ef32caae6047 (diff)
downloadlinux-3fa53518ad419bfacceae046a9d8027e4c4c5290.tar.xz
dmaengine: fsl-edma: fix all channels requested when call fsl_edma3_xlate()
dma_get_slave_channel() increases client_count for all channels. It should only be called when a matched channel is found in fsl_edma3_xlate(). Move dma_get_slave_channel() after checking for a matched channel. Cc: stable@vger.kernel.org Fixes: 72f5801a4e2b ("dmaengine: fsl-edma: integrate v3 support") Signed-off-by: Frank Li <Frank.Li@nxp.com> Link: https://lore.kernel.org/r/20231004142911.838916-1-Frank.Li@nxp.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/dma/fsl-edma-main.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/dma/fsl-edma-main.c b/drivers/dma/fsl-edma-main.c
index 621a460fae0c..8c4ed7012e23 100644
--- a/drivers/dma/fsl-edma-main.c
+++ b/drivers/dma/fsl-edma-main.c
@@ -154,18 +154,20 @@ static struct dma_chan *fsl_edma3_xlate(struct of_phandle_args *dma_spec,
fsl_chan = to_fsl_edma_chan(chan);
i = fsl_chan - fsl_edma->chans;
- chan = dma_get_slave_channel(chan);
- chan->device->privatecnt++;
fsl_chan->priority = dma_spec->args[1];
fsl_chan->is_rxchan = dma_spec->args[2] & ARGS_RX;
fsl_chan->is_remote = dma_spec->args[2] & ARGS_REMOTE;
fsl_chan->is_multi_fifo = dma_spec->args[2] & ARGS_MULTI_FIFO;
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;