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From: Arnd Bergmann <arnd@kernel.org>
To: "Vinod Koul" <vkoul@kernel.org>,
	"Andreas Färber" <afaerber@suse.de>,
	"Manivannan Sadhasivam" <manivannan.sadhasivam@linaro.org>,
	"Nathan Chancellor" <nathan@kernel.org>
Cc: "Arnd Bergmann" <arnd@arndb.de>,
	"Nick Desaulniers" <ndesaulniers@google.com>,
	"Bill Wendling" <morbo@google.com>,
	"Justin Stitt" <justinstitt@google.com>,
	"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
	"Randy Dunlap" <rdunlap@infradead.org>,
	"Rob Herring" <robh@kernel.org>,
	"Zhang Jianhua" <chris.zjh@huawei.com>,
	dmaengine@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-actions@lists.infradead.org, linux-kernel@vger.kernel.org,
	llvm@lists.linux.dev
Subject: [PATCH] dmaengine: owl: fix register access functions
Date: Fri, 22 Mar 2024 14:21:07 +0100	[thread overview]
Message-ID: <20240322132116.906475-1-arnd@kernel.org> (raw)

From: Arnd Bergmann <arnd@arndb.de>

When building with 'make W=1', clang notices that the computed register
values are never actually written back but instead the wrong variable
is set:

drivers/dma/owl-dma.c:244:6: error: variable 'regval' set but not used [-Werror,-Wunused-but-set-variable]
  244 |         u32 regval;
      |             ^
drivers/dma/owl-dma.c:268:6: error: variable 'regval' set but not used [-Werror,-Wunused-but-set-variable]
  268 |         u32 regval;
      |             ^

Change these to what was most likely intended.

Fixes: 47e20577c24d ("dmaengine: Add Actions Semi Owl family S900 DMA driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/dma/owl-dma.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/owl-dma.c b/drivers/dma/owl-dma.c
index 4e76c4ec2d39..e001f4f7aa64 100644
--- a/drivers/dma/owl-dma.c
+++ b/drivers/dma/owl-dma.c
@@ -250,7 +250,7 @@ static void pchan_update(struct owl_dma_pchan *pchan, u32 reg,
 	else
 		regval &= ~val;
 
-	writel(val, pchan->base + reg);
+	writel(regval, pchan->base + reg);
 }
 
 static void pchan_writel(struct owl_dma_pchan *pchan, u32 reg, u32 data)
@@ -274,7 +274,7 @@ static void dma_update(struct owl_dma *od, u32 reg, u32 val, bool state)
 	else
 		regval &= ~val;
 
-	writel(val, od->base + reg);
+	writel(regval, od->base + reg);
 }
 
 static void dma_writel(struct owl_dma *od, u32 reg, u32 data)
-- 
2.39.2


WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@kernel.org>
To: "Vinod Koul" <vkoul@kernel.org>,
	"Andreas Färber" <afaerber@suse.de>,
	"Manivannan Sadhasivam" <manivannan.sadhasivam@linaro.org>,
	"Nathan Chancellor" <nathan@kernel.org>
Cc: "Arnd Bergmann" <arnd@arndb.de>,
	"Nick Desaulniers" <ndesaulniers@google.com>,
	"Bill Wendling" <morbo@google.com>,
	"Justin Stitt" <justinstitt@google.com>,
	"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
	"Randy Dunlap" <rdunlap@infradead.org>,
	"Rob Herring" <robh@kernel.org>,
	"Zhang Jianhua" <chris.zjh@huawei.com>,
	dmaengine@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-actions@lists.infradead.org, linux-kernel@vger.kernel.org,
	llvm@lists.linux.dev
Subject: [PATCH] dmaengine: owl: fix register access functions
Date: Fri, 22 Mar 2024 14:21:07 +0100	[thread overview]
Message-ID: <20240322132116.906475-1-arnd@kernel.org> (raw)

From: Arnd Bergmann <arnd@arndb.de>

When building with 'make W=1', clang notices that the computed register
values are never actually written back but instead the wrong variable
is set:

drivers/dma/owl-dma.c:244:6: error: variable 'regval' set but not used [-Werror,-Wunused-but-set-variable]
  244 |         u32 regval;
      |             ^
drivers/dma/owl-dma.c:268:6: error: variable 'regval' set but not used [-Werror,-Wunused-but-set-variable]
  268 |         u32 regval;
      |             ^

Change these to what was most likely intended.

Fixes: 47e20577c24d ("dmaengine: Add Actions Semi Owl family S900 DMA driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/dma/owl-dma.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/owl-dma.c b/drivers/dma/owl-dma.c
index 4e76c4ec2d39..e001f4f7aa64 100644
--- a/drivers/dma/owl-dma.c
+++ b/drivers/dma/owl-dma.c
@@ -250,7 +250,7 @@ static void pchan_update(struct owl_dma_pchan *pchan, u32 reg,
 	else
 		regval &= ~val;
 
-	writel(val, pchan->base + reg);
+	writel(regval, pchan->base + reg);
 }
 
 static void pchan_writel(struct owl_dma_pchan *pchan, u32 reg, u32 data)
@@ -274,7 +274,7 @@ static void dma_update(struct owl_dma *od, u32 reg, u32 val, bool state)
 	else
 		regval &= ~val;
 
-	writel(val, od->base + reg);
+	writel(regval, od->base + reg);
 }
 
 static void dma_writel(struct owl_dma *od, u32 reg, u32 data)
-- 
2.39.2


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             reply	other threads:[~2024-03-22 13:21 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-03-22 13:21 Arnd Bergmann [this message]
2024-03-22 13:21 ` [PATCH] dmaengine: owl: fix register access functions Arnd Bergmann
2024-03-22 13:36 ` Peter Korsgaard
2024-03-22 13:36   ` Peter Korsgaard
2024-03-22 14:32 ` Manivannan Sadhasivam
2024-03-22 14:32   ` Manivannan Sadhasivam
2024-03-28  7:39 ` Vinod Koul
2024-03-28  7:39   ` Vinod Koul

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