linux-kernel - [PATCH v2 2/2] dmaengine: ti: add null check of devm_kasprintf in edma

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Message-Id: <20230318062255.76-2-void0red@gmail.com>
Date:   Sat, 18 Mar 2023 14:22:55 +0800
From:   void0red <void0red@...il.com>
To:     vkoul@...nel.org
Cc:     dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
        peter.ujfalusi@...il.com, void0red@...il.com
Subject: [PATCH v2 2/2] dmaengine: ti: add null check of devm_kasprintf in edma_probe

From: Kang Chen <void0red@...il.com>

devm_kasprintf may fails, irq_name might be null and wrong irq
name will be used in request.

Fixes: 2b6b3b742019 ("ARM/dmaengine: edma: Merge the two drivers under drivers/dma/")
Acked-by: Peter Ujfalusi <peter.ujfalusi@...il.com>
Reviewed-by: Vinod Koul <vkoul@...nel.org>
Signed-off-by: Kang Chen <void0red@...il.com>
---
v2 -> v1: split into two patches and add some tags

 drivers/dma/ti/edma.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/dma/ti/edma.c b/drivers/dma/ti/edma.c
index fa06d7e6d8e3..85cd72b6401a 100644
--- a/drivers/dma/ti/edma.c
+++ b/drivers/dma/ti/edma.c
@@ -2413,6 +2413,10 @@ static int edma_probe(struct platform_device *pdev)
 	if (irq >= 0) {
 		irq_name = devm_kasprintf(dev, GFP_KERNEL, "%s_ccint",
 					  dev_name(dev));
+		if (!irq_name) {
+			ret = -ENOMEM;
+			goto err_disable_pm;
+		}
 		ret = devm_request_irq(dev, irq, dma_irq_handler, 0, irq_name,
 				       ecc);
 		if (ret) {
@@ -2429,6 +2433,10 @@ static int edma_probe(struct platform_device *pdev)
 	if (irq >= 0) {
 		irq_name = devm_kasprintf(dev, GFP_KERNEL, "%s_ccerrint",
 					  dev_name(dev));
+		if (!irq_name) {
+			ret = -ENOMEM;
+			goto err_disable_pm;
+		}
 		ret = devm_request_irq(dev, irq, dma_ccerr_handler, 0, irq_name,
 				       ecc);
 		if (ret) {
-- 
2.34.1