5.4-stable review patch. If anyone has any objections, please let me know.
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From: Christophe JAILLET christophe.jaillet@wanadoo.fr
[ 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/a0ef5d0f5a47381617ef339df776ddc68ce48173.170462151... Signed-off-by: Vinod Koul vkoul@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/dma/fsl-qdma.c | 17 +++++------------ 1 file changed, 5 insertions(+), 12 deletions(-)
diff --git a/drivers/dma/fsl-qdma.c b/drivers/dma/fsl-qdma.c index f5a1ae164193..e3d07013ae8d 100644 --- a/drivers/dma/fsl-qdma.c +++ b/drivers/dma/fsl-qdma.c @@ -551,11 +551,11 @@ 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; @@ -1221,8 +1221,6 @@ 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);
@@ -1231,11 +1229,6 @@ 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; }