84 lines
2.8 KiB
Diff
84 lines
2.8 KiB
Diff
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diff -urN synaptics-0.14.6.orig/eventcomm.c synaptics-0.14.6/eventcomm.c
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--- synaptics-0.14.6.orig/eventcomm.c 2006-07-15 17:54:29.000000000 +0200
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+++ synaptics-0.14.6/eventcomm.c 2008-01-06 23:44:09.000000000 +0100
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@@ -40,16 +40,24 @@
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* Function Definitions
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****************************************************************************/
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-static void
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+static Bool
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+grab_event_device(int fd)
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+{
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+ int ret;
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+ SYSCALL(ret = ioctl(fd, EVIOCGRAB, (pointer)1));
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+ return !(ret < 0);
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+}
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+
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+static Bool
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EventDeviceOnHook(LocalDevicePtr local)
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{
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/* Try to grab the event device so that data don't leak to /dev/input/mice */
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- int ret;
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- SYSCALL(ret = ioctl(local->fd, EVIOCGRAB, (pointer)1));
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- if (ret < 0) {
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+ if(!grab_event_device(local->fd)) {
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xf86Msg(X_WARNING, "%s can't grab event device, errno=%d\n",
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local->name, errno);
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+ return FALSE;
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}
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+ return TRUE;
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}
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static void
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@@ -247,6 +255,7 @@
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char fname[64];
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int fd = -1;
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Bool is_touchpad;
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+ Bool is_grabbable;
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sprintf(fname, "%s/%s%d", DEV_INPUT_EVENT, EVENT_DEV_NAME, i);
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SYSCALL(fd = open(fname, O_RDONLY));
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@@ -263,8 +272,16 @@
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noent_cnt = 0;
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have_evdev = TRUE;
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is_touchpad = event_query_is_touchpad(fd);
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+ /**
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+ * Check whether device can be grabbed. This means there is a race
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+ * condition with EventDeviceOnHook, which can't be solved cleanly
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+ * the way things are done with the current design. One possible
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+ * solution would be to keep the file descriptor open.
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+ */
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+ is_grabbable = grab_event_device(fd);
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+
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SYSCALL(close(fd));
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- if (is_touchpad) {
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+ if (is_touchpad && is_grabbable) {
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xf86Msg(X_PROBED, "%s auto-dev sets device to %s\n",
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local->name, fname);
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xf86ReplaceStrOption(local->options, "Device", fname);
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diff -urN synaptics-0.14.6.orig/synaptics.c synaptics-0.14.6/synaptics.c
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--- synaptics-0.14.6.orig/synaptics.c 2006-07-15 17:54:29.000000000 +0200
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+++ synaptics-0.14.6/synaptics.c 2008-01-06 23:03:26.000000000 +0100
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@@ -543,7 +543,8 @@
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return !Success;
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}
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- priv->proto_ops->DeviceOnHook(local);
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+ if(!priv->proto_ops->DeviceOnHook(local))
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+ return !Success;
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priv->comm.buffer = XisbNew(local->fd, 64);
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if (!priv->comm.buffer) {
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diff -urN synaptics-0.14.6.orig/synproto.h synaptics-0.14.6/synproto.h
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--- synaptics-0.14.6.orig/synproto.h 2006-07-09 18:53:02.000000000 +0200
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+++ synaptics-0.14.6/synproto.h 2008-01-06 22:31:19.000000000 +0100
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@@ -76,7 +76,7 @@
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struct CommData;
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struct SynapticsProtocolOperations {
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- void (*DeviceOnHook)(LocalDevicePtr local);
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+ Bool (*DeviceOnHook)(LocalDevicePtr local);
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void (*DeviceOffHook)(LocalDevicePtr local);
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Bool (*QueryHardware)(LocalDevicePtr local, struct SynapticsHwInfo *synhw);
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Bool (*ReadHwState)(LocalDevicePtr local, struct SynapticsHwInfo *synhw,
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