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| author | Insu Yun <wuninsu@gmail.com> | 2015-10-19 19:42:21 +0300 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2015-10-23 09:32:01 +0300 |
| commit | ec7aa963bf81803b70b7da71bf79943ae5b9c531 (patch) | |
| tree | 3da4fe8a8847d00a9b418f67add5967e0070ee75 /drivers/input | |
| parent | ba564e789761368b44be1362ace576831778d371 (diff) | |
| download | linux-ec7aa963bf81803b70b7da71bf79943ae5b9c531.tar.xz | |
Input: xen - check return value of xenbus_printf
Internally, xenbus_printf uses memory allocation, so it can fail under
memory pressure, leaving the input device configured as absolute with the
backend supplying relative coordinates.
Signed-off-by: Insu Yun <wuninsu@gmail.com>
Reviewed-by: Julien Grall <julien.grall@citrix.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/misc/xen-kbdfront.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/input/misc/xen-kbdfront.c b/drivers/input/misc/xen-kbdfront.c index 23d0549539d4..0a9ad2cfb55c 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(); |