dmaengine: fsldma: Fix a resource leak in an error handling path of the probe function

[ Upstream commit b202d4e82531a62a33a6b14d321dd2aad491578e ]

In case of error, the previous 'fsl_dma_chan_probe()' calls must be undone
by some 'fsl_dma_chan_remove()', as already done in the remove function.

It was added in the remove function in commit 77cd62e8082b ("fsldma: allow
Freescale Elo DMA driver to be compiled as a module")

Fixes: d3f620b2c4fe ("fsldma: simplify IRQ probing and handling")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/20201212160614.92576-1-christophe.jaillet@wanadoo.fr
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index 996f1d7623d69863cda462a58fcd596b9257eae0..eae385a312b886d15667ab4dca35309f0c48fce7 100644 (file)
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -1214,6 +1214,7 @@ static int fsldma_of_probe(struct platform_device *op)
 {
        struct fsldma_device *fdev;
        struct device_node *child;
+       unsigned int i;
        int err;
 
        fdev = kzalloc(sizeof(*fdev), GFP_KERNEL);
@@ -1292,6 +1293,10 @@ static int fsldma_of_probe(struct platform_device *op)
        return 0;
 
 out_free_fdev:
+       for (i = 0; i < FSL_DMA_MAX_CHANS_PER_DEVICE; i++) {
+               if (fdev->chan[i])
+                       fsl_dma_chan_remove(fdev->chan[i]);
+       }
        irq_dispose_mapping(fdev->irq);
        iounmap(fdev->regs);
 out_free: