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[PATCH] xen: check return value of xenbus_printf

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  [PATCH] xen: check return value of xenbus_printf Insu Yun <wuninsu@gmail.com> - 2015-10-19 18:10 +0200
    Re: [PATCH] xen: check return value of xenbus_printf Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2015-10-19 18:50 +0200

#1250877 — [PATCH] xen: check return value of xenbus_printf

Signed-off-by: Insu Yun <wuninsu@gmail.com>
---
 drivers/input/misc/xen-kbdfront.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/input/misc/xen-kbdfront.c b/drivers/input/misc/xen-kbdfront.c
index 23d0549..0a9ad2cf 100644
--- a/drivers/input/misc/xen-kbdfront.c
+++ b/drivers/input/misc/xen-kbdfront.c
@@ -129,8 +129,14 @@ static int xenkbd_probe(struct xenbus_device *dev,
 
 	if (xenbus_scanf(XBT_NIL, dev->otherend, "feature-abs-pointer", "%d", &abs) < 0)
 		abs = 0;
-	if (abs)
-		xenbus_printf(XBT_NIL, dev->nodename, "request-abs-pointer", "1");
+	if (abs) {
+		ret = xenbus_printf(XBT_NIL, dev->nodename,
+				    "request-abs-pointer", "1");
+		if (ret) {
+			pr_warning("xenkbd: can't request abs-pointer");
+			abs = 0;
+		}
+	}
 
 	/* keyboard */
 	kbd = input_allocate_device();
-- 
1.9.1

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#1250915

On Mon, Oct 19, 2015 at 04:02:51PM +0000, Insu Yun wrote:
> Signed-off-by: Insu Yun <wuninsu@gmail.com>

Applied, thank you. However you still are missing the commit description
on this version of the patch; I had to fish it from your original
posting.

Thanks.

> ---
>  drivers/input/misc/xen-kbdfront.c | 10 ++++++++--
>  1 file changed, 8 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/input/misc/xen-kbdfront.c b/drivers/input/misc/xen-kbdfront.c
> index 23d0549..0a9ad2cf 100644
> --- a/drivers/input/misc/xen-kbdfront.c
> +++ b/drivers/input/misc/xen-kbdfront.c
> @@ -129,8 +129,14 @@ static int xenkbd_probe(struct xenbus_device *dev,
>  
>  	if (xenbus_scanf(XBT_NIL, dev->otherend, "feature-abs-pointer", "%d", &abs) < 0)
>  		abs = 0;
> -	if (abs)
> -		xenbus_printf(XBT_NIL, dev->nodename, "request-abs-pointer", "1");
> +	if (abs) {
> +		ret = xenbus_printf(XBT_NIL, dev->nodename,
> +				    "request-abs-pointer", "1");
> +		if (ret) {
> +			pr_warning("xenkbd: can't request abs-pointer");
> +			abs = 0;
> +		}
> +	}
>  
>  	/* keyboard */
>  	kbd = input_allocate_device();
> -- 
> 1.9.1
> 

-- 
Dmitry
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