Thread (14 messages) 14 messages, 4 authors, 2022-03-22

RE: [PATCH 2/6] fpga: zynqmp: Initialized variables before using it

From: Nava kishore Manne <hidden>
Date: 2022-03-15 11:48:19
Also in: linux-fpga, lkml

Hi Yilun,

	Thanks for providing the review comments.
Please find my response inline.
-----Original Message-----
From: Xu Yilun <yilun.xu@intel.com>
Sent: Friday, March 11, 2022 7:58 PM
To: Nava kishore Manne <redacted>
Cc: mdf@kernel.org; hao.wu@intel.com; trix@redhat.com; Michal Simek
[off-list ref]; linux-fpga@vger.kernel.org; linux-
kernel@vger.kernel.org; linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 2/6] fpga: zynqmp: Initialized variables before using it

On Tue, Mar 08, 2022 at 03:15:15PM +0530, Nava kishore Manne wrote:
quoted
This patch initialized variables with the proper value.
Addresses-Coverity: "uninit_use: Using uninitialized value"

Signed-off-by: Nava kishore Manne <redacted>
---
 drivers/fpga/zynqmp-fpga.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/fpga/zynqmp-fpga.c b/drivers/fpga/zynqmp-fpga.c
index c60f20949c47..e931d69819a7 100644
--- a/drivers/fpga/zynqmp-fpga.c
+++ b/drivers/fpga/zynqmp-fpga.c
@@ -41,7 +41,7 @@ static int zynqmp_fpga_ops_write(struct
fpga_manager *mgr,
quoted
 				 const char *buf, size_t size)
 {
 	struct zynqmp_fpga_priv *priv;
-	dma_addr_t dma_addr;
+	dma_addr_t dma_addr = 0;
The first use of this variable is as an output parameter:

	kbuf = dma_alloc_coherent(priv->dev, size, &dma_addr,
GFP_KERNEL);

So I don't think it needs to be initialized as 0.
This issue is found by Coverity Scan, Whether this param is input/output this fix will not impact the actual functionality.
In order to fix the issues reported by the Coverity tool, this fix is needed.

Regards,
Navakishore.

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