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authorJuergen Gross <jgross@suse.com>2016-10-31 16:58:40 +0300
committerJuergen Gross <jgross@suse.com>2016-11-07 15:55:20 +0300
commit81362c6f159dcb59fadd60927aa00497d715ca80 (patch)
tree6124e7aa9450f84b233ff3be9f043e00090d114a
parent0240933469ea4cc1aa1c32867349c4aa718fe264 (diff)
downloadlinux-81362c6f159dcb59fadd60927aa00497d715ca80.tar.xz
xen: make use of xenbus_read_unsigned() in xen-kbdfront
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@gmail.com Cc: linux-input@vger.kernel.org Signed-off-by: Juergen Gross <jgross@suse.com> Acked-by: David Vrabel <david.vrabel@citrix.com>
-rw-r--r--drivers/input/misc/xen-kbdfront.c13
1 files changed, 5 insertions, 8 deletions
diff --git a/drivers/input/misc/xen-kbdfront.c b/drivers/input/misc/xen-kbdfront.c
index 227fbd2dbb71..3900875dec10 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)