Re: [PATCH] drm/rockchip: fix NULL check on devm_kzalloc() return value

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On 2017年07月07日 05:58, Gustavo A. R. Silva wrote:
The right variable to check here is port, not dp.

This issue was detected using Coccinelle and the following semantic patch:

@@
expression x;
identifier fld;
@@

* x = devm_kzalloc(...);
   ... when != x == NULL
   x->fld

Signed-off-by: Gustavo A. R. Silva <garsilva@xxxxxxxxxxxxxx>

Thanks for the fix,

Acked-by: Mark Yao <mark.yao@xxxxxxxxxxxxxx>

---
  drivers/gpu/drm/rockchip/cdn-dp-core.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/rockchip/cdn-dp-core.c b/drivers/gpu/drm/rockchip/cdn-dp-core.c
index 14fa1f8..9b0b058 100644
--- a/drivers/gpu/drm/rockchip/cdn-dp-core.c
+++ b/drivers/gpu/drm/rockchip/cdn-dp-core.c
@@ -1195,7 +1195,7 @@ static int cdn_dp_probe(struct platform_device *pdev)
  			continue;
port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
-		if (!dp)
+		if (!port)
  			return -ENOMEM;
port->extcon = extcon;


--
Mark Yao


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