From: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
To: Lizhi Hou <lizhi.hou@amd.com>, Brian Xu <brian.xu@amd.com>,
Raj Kumar Rampelli <raj.kumar.rampelli@amd.com>,
Vinod Koul <vkoul@kernel.org>,
Michal Simek <michal.simek@amd.com>,
Sonal Santan <sonal.santan@amd.com>, Max Zhen <max.zhen@amd.com>,
dmaengine@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Cc: dan.carpenter@linaro.org, kernel-janitors@vger.kernel.org,
error27@gmail.com, harshit.m.mogalapalli@oracle.com
Subject: [PATCH] dmaengine: xilinx: xdma: Fix IS_ERR() vs NULL bug in xdma_probe()
Date: Mon, 19 Aug 2024 12:36:40 -0700 [thread overview]
Message-ID: <20240819193641.600176-1-harshit.m.mogalapalli@oracle.com> (raw)
devm_regmap_init_mmio() returns error pointers on error, it doesn't
return NULL. Update the error check.
Fixes: 17ce252266c7 ("dmaengine: xilinx: xdma: Add xilinx xdma driver")
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
---
This is based on static analysis with smatch, only compile tested.
---
drivers/dma/xilinx/xdma.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/dma/xilinx/xdma.c b/drivers/dma/xilinx/xdma.c
index 718842fdaf98..44fae351f0a0 100644
--- a/drivers/dma/xilinx/xdma.c
+++ b/drivers/dma/xilinx/xdma.c
@@ -1240,7 +1240,8 @@ static int xdma_probe(struct platform_device *pdev)
xdev->rmap = devm_regmap_init_mmio(&pdev->dev, reg_base,
&xdma_regmap_config);
- if (!xdev->rmap) {
+ if (IS_ERR(xdev->rmap)) {
+ ret = PTR_ERR(xdev->rmap);
xdma_err(xdev, "config regmap failed: %d", ret);
goto failed;
}
--
2.39.3
next reply other threads:[~2024-08-19 19:37 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-19 19:36 Harshit Mogalapalli [this message]
2024-08-19 20:11 ` [PATCH] dmaengine: xilinx: xdma: Fix IS_ERR() vs NULL bug in xdma_probe() Lizhi Hou
2024-08-19 20:38 ` Dan Carpenter
2024-08-20 15:25 ` Lizhi Hou
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