Re: [PATCH] drivers: video: mxsfb: clean use of devm_ioremap_resource()

Re: [PATCH] drivers: video: mxsfb: clean use of devm_ioremap_resource()

[Jingoo Han]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain; charset=euc-kr, Size: 2097 bytes --]

Tuesday, May 14, 2013 6:25 PM, Laurent Navet wrote:
> 
> Check of 'res' and calls to dev_err are already done in devm_ioremap_resource,
> so no need to do them twice.
> 
> Signed-off-by: Laurent Navet <laurent.navet@gmail.com>
> ---
>  drivers/video/mxsfb.c |   14 ++++----------
>  1 file changed, 4 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/video/mxsfb.c b/drivers/video/mxsfb.c
> index 21223d4..0f3d0fc 100644
> --- a/drivers/video/mxsfb.c
> +++ b/drivers/video/mxsfb.c
> @@ -884,9 +884,10 @@ static int mxsfb_probe(struct platform_device *pdev)
>  		pdev->id_entry = of_id->data;
> 
>  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -	if (!res) {
> -		dev_err(&pdev->dev, "Cannot get memory IO resource\n");
> -		return -ENODEV;
> +	host->base = devm_ioremap_resource(&pdev->dev, res);
> +	if (IS_ERR(host->base)) {
> +		ret = PTR_ERR(host->base);
> +		goto fb_release;

It makes build warning as below:

drivers/video/mxsfb.c:887:13: warning: 'host' is used uninitialized in this function [-Wuninitialized]
drivers/video/mxsfb.c:965:21: warning: 'fb_info' may be used uninitialized in this function [-Wuninitialized]

It breaks the assignment.
	host = to_imxfb_host(fb_info);

Also, 'goto fb_release;' is not good.
Please use ' return PTR_ERR(host->base);' as below:
+       host->base = devm_ioremap_resource(&pdev->dev, res);
+       if (IS_ERR(host->base))
+               return PTR_ERR(host->base);


Best regards,
Jingoo Han

>  	}
> 
>  	fb_info = framebuffer_alloc(sizeof(struct mxsfb_info), &pdev->dev);
> @@ -897,13 +898,6 @@ static int mxsfb_probe(struct platform_device *pdev)
> 
>  	host = to_imxfb_host(fb_info);
> 
> -	host->base = devm_ioremap_resource(&pdev->dev, res);
> -	if (IS_ERR(host->base)) {
> -		dev_err(&pdev->dev, "ioremap failed\n");
> -		ret = PTR_ERR(host->base);
> -		goto fb_release;
> -	}
> -
>  	host->pdev = pdev;
>  	platform_set_drvdata(pdev, host);
> 
> --
> 1.7.10.4
ÿôèº{.nÇ+‰·Ÿ®‰­†+%ŠËÿ±éݶ\x17¥Šwÿº{.nÇ+‰·¥Š{±þG«éÿŠ{ayº\x1dʇڙë,j\a­¢f£¢·hšïêÿ‘êçz_è®\x03(­éšŽŠÝ¢j"ú\x1a¶^[m§ÿÿ¾\a«þG«éÿ¢¸?™¨è­Ú&£ø§~á¶iO•æ¬z·švØ^\x14\x04\x1a¶^[m§ÿÿÃ\fÿ¶ìÿ¢¸?–I¥

Re: [PATCH] drivers: video: mxsfb: clean use of devm_ioremap_resource()

[Jingoo Han]

VHVlc2RheSwgTWF5IDE0LCAyMDEzIDY6MjUgUE0sIExhdXJlbnQgTmF2ZXQgd3JvdGU6DQo+IA0K
PiBDaGVjayBvZiAncmVzJyBhbmQgY2FsbHMgdG8gZGV2X2VyciBhcmUgYWxyZWFkeSBkb25lIGlu
IGRldm1faW9yZW1hcF9yZXNvdXJjZSwNCj4gc28gbm8gbmVlZCB0byBkbyB0aGVtIHR3aWNlLg0K
PiANCj4gU2lnbmVkLW9mZi1ieTogTGF1cmVudCBOYXZldCA8bGF1cmVudC5uYXZldEBnbWFpbC5j
b20+DQo+IC0tLQ0KPiAgZHJpdmVycy92aWRlby9teHNmYi5jIHwgICAxNCArKysrLS0tLS0tLS0t
LQ0KPiAgMSBmaWxlIGNoYW5nZWQsIDQgaW5zZXJ0aW9ucygrKSwgMTAgZGVsZXRpb25zKC0pDQo+
IA0KPiBkaWZmIC0tZ2l0IGEvZHJpdmVycy92aWRlby9teHNmYi5jIGIvZHJpdmVycy92aWRlby9t
eHNmYi5jDQo+IGluZGV4IDIxMjIzZDQuLjBmM2QwZmMgMTAwNjQ0DQo+IC0tLSBhL2RyaXZlcnMv
dmlkZW8vbXhzZmIuYw0KPiArKysgYi9kcml2ZXJzL3ZpZGVvL214c2ZiLmMNCj4gQEAgLTg4NCw5
ICs4ODQsMTAgQEAgc3RhdGljIGludCBteHNmYl9wcm9iZShzdHJ1Y3QgcGxhdGZvcm1fZGV2aWNl
ICpwZGV2KQ0KPiAgCQlwZGV2LT5pZF9lbnRyeSA9IG9mX2lkLT5kYXRhOw0KPiANCj4gIAlyZXMg
PSBwbGF0Zm9ybV9nZXRfcmVzb3VyY2UocGRldiwgSU9SRVNPVVJDRV9NRU0sIDApOw0KPiAtCWlm
ICghcmVzKSB7DQo+IC0JCWRldl9lcnIoJnBkZXYtPmRldiwgIkNhbm5vdCBnZXQgbWVtb3J5IElP
IHJlc291cmNlXG4iKTsNCj4gLQkJcmV0dXJuIC1FTk9ERVY7DQo+ICsJaG9zdC0+YmFzZSA9IGRl
dm1faW9yZW1hcF9yZXNvdXJjZSgmcGRldi0+ZGV2LCByZXMpOw0KPiArCWlmIChJU19FUlIoaG9z
dC0+YmFzZSkpIHsNCj4gKwkJcmV0ID0gUFRSX0VSUihob3N0LT5iYXNlKTsNCj4gKwkJZ290byBm
Yl9yZWxlYXNlOw0KDQpJdCBtYWtlcyBidWlsZCB3YXJuaW5nIGFzIGJlbG93Og0KDQpkcml2ZXJz
L3ZpZGVvL214c2ZiLmM6ODg3OjEzOiB3YXJuaW5nOiAnaG9zdCcgaXMgdXNlZCB1bmluaXRpYWxp
emVkIGluIHRoaXMgZnVuY3Rpb24gWy1XdW5pbml0aWFsaXplZF0NCmRyaXZlcnMvdmlkZW8vbXhz
ZmIuYzo5NjU6MjE6IHdhcm5pbmc6ICdmYl9pbmZvJyBtYXkgYmUgdXNlZCB1bmluaXRpYWxpemVk
IGluIHRoaXMgZnVuY3Rpb24gWy1XdW5pbml0aWFsaXplZF0NCg0KSXQgYnJlYWtzIHRoZSBhc3Np
Z25tZW50Lg0KCWhvc3QgPSB0b19pbXhmYl9ob3N0KGZiX2luZm8pOw0KDQpBbHNvLCAnZ290byBm
Yl9yZWxlYXNlOycgaXMgbm90IGdvb2QuDQpQbGVhc2UgdXNlICcgcmV0dXJuIFBUUl9FUlIoaG9z
dC0+YmFzZSk7JyBhcyBiZWxvdzoNCisgICAgICAgaG9zdC0+YmFzZSA9IGRldm1faW9yZW1hcF9y
ZXNvdXJjZSgmcGRldi0+ZGV2LCByZXMpOw0KKyAgICAgICBpZiAoSVNfRVJSKGhvc3QtPmJhc2Up
KQ0KKyAgICAgICAgICAgICAgIHJldHVybiBQVFJfRVJSKGhvc3QtPmJhc2UpOw0KDQoNCkJlc3Qg
cmVnYXJkcywNCkppbmdvbyBIYW4NCg0KPiAgCX0NCj4gDQo+ICAJZmJfaW5mbyA9IGZyYW1lYnVm
ZmVyX2FsbG9jKHNpemVvZihzdHJ1Y3QgbXhzZmJfaW5mbyksICZwZGV2LT5kZXYpOw0KPiBAQCAt
ODk3LDEzICs4OTgsNiBAQCBzdGF0aWMgaW50IG14c2ZiX3Byb2JlKHN0cnVjdCBwbGF0Zm9ybV9k
ZXZpY2UgKnBkZXYpDQo+IA0KPiAgCWhvc3QgPSB0b19pbXhmYl9ob3N0KGZiX2luZm8pOw0KPiAN
Cj4gLQlob3N0LT5iYXNlID0gZGV2bV9pb3JlbWFwX3Jlc291cmNlKCZwZGV2LT5kZXYsIHJlcyk7
DQo+IC0JaWYgKElTX0VSUihob3N0LT5iYXNlKSkgew0KPiAtCQlkZXZfZXJyKCZwZGV2LT5kZXYs
ICJpb3JlbWFwIGZhaWxlZFxuIik7DQo+IC0JCXJldCA9IFBUUl9FUlIoaG9zdC0+YmFzZSk7DQo+
IC0JCWdvdG8gZmJfcmVsZWFzZTsNCj4gLQl9DQo+IC0NCj4gIAlob3N0LT5wZGV2ID0gcGRldjsN
Cj4gIAlwbGF0Zm9ybV9zZXRfZHJ2ZGF0YShwZGV2LCBob3N0KTsNCj4gDQo+IC0tDQo+IDEuNy4x
MC40DQo

Re: [PATCH] drivers: video: mxsfb: clean use of devm_ioremap_resource()

[Laurent Navet]

2013/5/16, Jingoo Han <jg1.han@samsung.com>:
> It makes build warning as below:
>
> drivers/video/mxsfb.c:887:13: warning: 'host' is used uninitialized in this
> function [-Wuninitialized]
> drivers/video/mxsfb.c:965:21: warning: 'fb_info' may be used uninitialized
> in this function [-Wuninitialized]
>
> It breaks the assignment.
> 	host = to_imxfb_host(fb_info);
>
> Also, 'goto fb_release;' is not good.
> Please use ' return PTR_ERR(host->base);' as below:
> +       host->base = devm_ioremap_resource(&pdev->dev, res);
> +       if (IS_ERR(host->base))
> +               return PTR_ERR(host->base);
>
>
> Best regards,
> Jingoo Han

Thank's for reviewing, I'll look at and resend.

Laurent,

Re: [PATCH] drivers: video: mxsfb: clean use of devm_ioremap_resource()

[Laurent Navet]

2013/5/16, Jingoo Han <jg1.han@samsung.com>:
> It makes build warning as below:
>
> drivers/video/mxsfb.c:887:13: warning: 'host' is used uninitialized in this
> function [-Wuninitialized]
> drivers/video/mxsfb.c:965:21: warning: 'fb_info' may be used uninitialized
> in this function [-Wuninitialized]
>
> It breaks the assignment.
> 	host = to_imxfb_host(fb_info);
>
> Also, 'goto fb_release;' is not good.
> Please use ' return PTR_ERR(host->base);' as below:
> +       host->base = devm_ioremap_resource(&pdev->dev, res);
> +       if (IS_ERR(host->base))
> +               return PTR_ERR(host->base);
>
>
> Best regards,
> Jingoo Han

Thank's for reviewing, I'll look at and resend.

Laurent,

[PATCH V2] drivers: video: mxsfb: clean use of devm_ioremap_resource()

[Laurent Navet]

Check of 'res' and calls to dev_err are already done in devm_ioremap_resource,
so no need to do them twice.

Signed-off-by: Laurent Navet <laurent.navet@gmail.com>
---
 drivers/video/mxsfb.c |    8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/drivers/video/mxsfb.c b/drivers/video/mxsfb.c
index 21223d4..6a1b338 100644
--- a/drivers/video/mxsfb.c
+++ b/drivers/video/mxsfb.c
@@ -883,12 +883,6 @@ static int mxsfb_probe(struct platform_device *pdev)
 	if (of_id)
 		pdev->id_entry = of_id->data;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "Cannot get memory IO resource\n");
-		return -ENODEV;
-	}
-
 	fb_info = framebuffer_alloc(sizeof(struct mxsfb_info), &pdev->dev);
 	if (!fb_info) {
 		dev_err(&pdev->dev, "Failed to allocate fbdev\n");
@@ -897,9 +891,9 @@ static int mxsfb_probe(struct platform_device *pdev)
 
 	host = to_imxfb_host(fb_info);
 
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	host->base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(host->base)) {
-		dev_err(&pdev->dev, "ioremap failed\n");
 		ret = PTR_ERR(host->base);
 		goto fb_release;
 	}
-- 
1.7.10.4

[PATCH V2] drivers: video: mxsfb: clean use of devm_ioremap_resource()

[Laurent Navet]

Check of 'res' and calls to dev_err are already done in devm_ioremap_resource,
so no need to do them twice.

Signed-off-by: Laurent Navet <laurent.navet@gmail.com>
---
 drivers/video/mxsfb.c |    8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/drivers/video/mxsfb.c b/drivers/video/mxsfb.c
index 21223d4..6a1b338 100644
--- a/drivers/video/mxsfb.c
+++ b/drivers/video/mxsfb.c
@@ -883,12 +883,6 @@ static int mxsfb_probe(struct platform_device *pdev)
 	if (of_id)
 		pdev->id_entry = of_id->data;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "Cannot get memory IO resource\n");
-		return -ENODEV;
-	}
-
 	fb_info = framebuffer_alloc(sizeof(struct mxsfb_info), &pdev->dev);
 	if (!fb_info) {
 		dev_err(&pdev->dev, "Failed to allocate fbdev\n");
@@ -897,9 +891,9 @@ static int mxsfb_probe(struct platform_device *pdev)
 
 	host = to_imxfb_host(fb_info);
 
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	host->base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(host->base)) {
-		dev_err(&pdev->dev, "ioremap failed\n");
 		ret = PTR_ERR(host->base);
 		goto fb_release;
 	}
-- 
1.7.10.4

[PATCH] drivers: video: mxsfb: clean use of devm_ioremap_resource()

[Laurent Navet]

Check of 'res' and calls to dev_err are already done in devm_ioremap_resource,
so no need to do them twice.

Signed-off-by: Laurent Navet <laurent.navet@gmail.com>
---
 drivers/video/mxsfb.c |   14 ++++----------
 1 file changed, 4 insertions(+), 10 deletions(-)

diff --git a/drivers/video/mxsfb.c b/drivers/video/mxsfb.c
index 21223d4..0f3d0fc 100644
--- a/drivers/video/mxsfb.c
+++ b/drivers/video/mxsfb.c
@@ -884,9 +884,10 @@ static int mxsfb_probe(struct platform_device *pdev)
 		pdev->id_entry = of_id->data;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "Cannot get memory IO resource\n");
-		return -ENODEV;
+	host->base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(host->base)) {
+		ret = PTR_ERR(host->base);
+		goto fb_release;
 	}
 
 	fb_info = framebuffer_alloc(sizeof(struct mxsfb_info), &pdev->dev);
@@ -897,13 +898,6 @@ static int mxsfb_probe(struct platform_device *pdev)
 
 	host = to_imxfb_host(fb_info);
 
-	host->base = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(host->base)) {
-		dev_err(&pdev->dev, "ioremap failed\n");
-		ret = PTR_ERR(host->base);
-		goto fb_release;
-	}
-
 	host->pdev = pdev;
 	platform_set_drvdata(pdev, host);
 
-- 
1.7.10.4

[PATCH] drivers: video: mxsfb: clean use of devm_ioremap_resource()

[Laurent Navet]

Check of 'res' and calls to dev_err are already done in devm_ioremap_resource,
so no need to do them twice.

Signed-off-by: Laurent Navet <laurent.navet@gmail.com>
---
 drivers/video/mxsfb.c |   14 ++++----------
 1 file changed, 4 insertions(+), 10 deletions(-)

diff --git a/drivers/video/mxsfb.c b/drivers/video/mxsfb.c
index 21223d4..0f3d0fc 100644
--- a/drivers/video/mxsfb.c
+++ b/drivers/video/mxsfb.c
@@ -884,9 +884,10 @@ static int mxsfb_probe(struct platform_device *pdev)
 		pdev->id_entry = of_id->data;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "Cannot get memory IO resource\n");
-		return -ENODEV;
+	host->base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(host->base)) {
+		ret = PTR_ERR(host->base);
+		goto fb_release;
 	}
 
 	fb_info = framebuffer_alloc(sizeof(struct mxsfb_info), &pdev->dev);
@@ -897,13 +898,6 @@ static int mxsfb_probe(struct platform_device *pdev)
 
 	host = to_imxfb_host(fb_info);
 
-	host->base = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(host->base)) {
-		dev_err(&pdev->dev, "ioremap failed\n");
-		ret = PTR_ERR(host->base);
-		goto fb_release;
-	}
-
 	host->pdev = pdev;
 	platform_set_drvdata(pdev, host);
 
-- 
1.7.10.4