linux-kernel - [PATCH v1] firmware:Fix an NULL vs IS

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Message-Id: <20230704082706.1721-1-machel@vivo.com>
Date:   Tue,  4 Jul 2023 16:26:56 +0800
From:   Wang Ming <machel@...o.com>
To:     Dinh Nguyen <dinguyen@...nel.org>, linux-kernel@...r.kernel.org
Cc:     opensource.kernel@...o.com, Wang Ming <machel@...o.com>
Subject: [PATCH v1] firmware:Fix an NULL vs IS_ERR() bug in probe

The devm_memremap() function returns error pointers.
It never returns NULL. Fix the check.

Signed-off-by: Wang Ming <machel@...o.com>
---
 drivers/firmware/stratix10-svc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/firmware/stratix10-svc.c b/drivers/firmware/stratix10-svc.c
index 2d6741261..cab11af28 100644
--- a/drivers/firmware/stratix10-svc.c
+++ b/drivers/firmware/stratix10-svc.c
@@ -756,7 +756,7 @@ svc_create_memory_pool(struct platform_device *pdev,
 	paddr = begin;
 	size = end - begin;
 	va = devm_memremap(dev, paddr, size, MEMREMAP_WC);
-	if (!va) {
+	if (IS_ERR(va)) {
 		dev_err(dev, "fail to remap shared memory\n");
 		return ERR_PTR(-EINVAL);
 	}
-- 
2.25.1