dmaengine: fsl-qdma: Fix a memory leak related to the status queue DMA

[ Upstream commit 968bc1d7203d384e72afe34124a1801b7af76514 ]

This dma_alloc_coherent() is undone in the remove function, but not in the
error handling path of fsl_qdma_probe().

Switch to the managed version to fix the issue in the probe and simplify
the remove function.

Fixes: b092529e0aa0 ("dmaengine: fsl-qdma: Add qDMA controller driver for Layerscape SoCs")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/a0ef5d0f5a47381617ef339df776ddc68ce48173.1704621515.git.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/fsl-qdma.c b/drivers/dma/fsl-qdma.c
index a8cc8a4..e4606ab 100644 (file)
--- a/drivers/dma/fsl-qdma.c
+++ b/drivers/dma/fsl-qdma.c
@@ -563,11 +563,11 @@ static struct fsl_qdma_queue
        /*
         * Buffer for queue command
         */
-       status_head->cq = dma_alloc_coherent(&pdev->dev,
-                                            sizeof(struct fsl_qdma_format) *
-                                            status_size,
-                                            &status_head->bus_addr,
-                                            GFP_KERNEL);
+       status_head->cq = dmam_alloc_coherent(&pdev->dev,
+                                             sizeof(struct fsl_qdma_format) *
+                                             status_size,
+                                             &status_head->bus_addr,
+                                             GFP_KERNEL);
        if (!status_head->cq) {
                devm_kfree(&pdev->dev, status_head);
                return NULL;
@@ -1268,8 +1268,6 @@ static void fsl_qdma_cleanup_vchan(struct dma_device *dmadev)
 
 static int fsl_qdma_remove(struct platform_device *pdev)
 {
-       int i;
-       struct fsl_qdma_queue *status;
        struct device_node *np = pdev->dev.of_node;
        struct fsl_qdma_engine *fsl_qdma = platform_get_drvdata(pdev);
 
@@ -1278,11 +1276,6 @@ static int fsl_qdma_remove(struct platform_device *pdev)
        of_dma_controller_free(np);
        dma_async_device_unregister(&fsl_qdma->dma_dev);
 
-       for (i = 0; i < fsl_qdma->block_number; i++) {
-               status = fsl_qdma->status[i];
-               dma_free_coherent(&pdev->dev, sizeof(struct fsl_qdma_format) *
-                               status->n_cq, status->cq, status->bus_addr);
-       }
        return 0;
 }