On Mon, Oct 31, 2016 at 05:48:23PM +0100, Juergen Gross wrote:
> Use xenbus_read_unsigned() instead of xenbus_scanf() when possible.
> This requires to change the type of the reads from int to unsigned,
> but these cases have been wrong before: negative values are not allowed
> for the modified cases.
>
> Cc: dmitry.torokhov@xxxxxxxxx
> Cc: linux-input@xxxxxxxxxxxxxxx
>
> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
Acked-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
> ---
> drivers/input/misc/xen-kbdfront.c | 13 +++++--------
> 1 file changed, 5 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/input/misc/xen-kbdfront.c b/drivers/input/misc/xen-kbdfront.c
> index 227fbd2..3900875 100644
> --- a/drivers/input/misc/xen-kbdfront.c
> +++ b/drivers/input/misc/xen-kbdfront.c
> @@ -108,7 +108,8 @@ static irqreturn_t input_handler(int rq, void *dev_id)
> static int xenkbd_probe(struct xenbus_device *dev,
> const struct xenbus_device_id *id)
> {
> - int ret, i, abs;
> + int ret, i;
> + unsigned int abs;
> struct xenkbd_info *info;
> struct input_dev *kbd, *ptr;
>
> @@ -127,8 +128,7 @@ static int xenkbd_probe(struct xenbus_device *dev,
> if (!info->page)
> goto error_nomem;
>
> - if (xenbus_scanf(XBT_NIL, dev->otherend, "feature-abs-pointer", "%d", &abs) < 0)
> - abs = 0;
> + abs = xenbus_read_unsigned(dev->otherend, "feature-abs-pointer", 0);
> if (abs) {
> ret = xenbus_write(XBT_NIL, dev->nodename,
> "request-abs-pointer", "1");
> @@ -322,11 +322,8 @@ static void xenkbd_backend_changed(struct xenbus_device *dev,
>
> case XenbusStateInitWait:
> InitWait:
> - ret = xenbus_scanf(XBT_NIL, info->xbdev->otherend,
> - "feature-abs-pointer", "%d", &val);
> - if (ret < 0)
> - val = 0;
> - if (val) {
> + if (xenbus_read_unsigned(info->xbdev->otherend,
> + "feature-abs-pointer", 0)) {
> ret = xenbus_write(XBT_NIL, info->xbdev->nodename,
> "request-abs-pointer", "1");
> if (ret)
> --
> 2.6.6
>
--
Dmitry
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