Here are a couple of fixes for the hdaps driver. I have kind of been
blocking out the bug traces caused by these (the 2nd patch, actually)
thinking that it's one of those transient / churn things... but it's
getting annoying now because I think it turns off lockdep. After this
patch it no longer produces warnings, but I don't actually know if it
does the right thing (because I don't really know what the driver
does or how to test it anyway!).
---
hdaps was using incorrect mutex_trylock return code.
Signed-off-by: Nick Piggin <[email protected]>
---
Index: linux-2.6/drivers/hwmon/hdaps.c
===================================================================
--- linux-2.6.orig/drivers/hwmon/hdaps.c
+++ linux-2.6/drivers/hwmon/hdaps.c
@@ -328,22 +328,20 @@ static void hdaps_mousedev_poll(unsigned
int x, y;
/* Cannot sleep. Try nonblockingly. If we fail, try again later. */
- if (mutex_trylock(&hdaps_mtx)) {
- mod_timer(&hdaps_timer,jiffies + HDAPS_POLL_PERIOD);
- return;
- }
+ if (!mutex_trylock(&hdaps_mtx))
+ goto out;
if (__hdaps_read_pair(HDAPS_PORT_XPOS, HDAPS_PORT_YPOS, &x, &y))
- goto out;
+ goto out_lock;
input_report_abs(hdaps_idev, ABS_X, x - rest_x);
input_report_abs(hdaps_idev, ABS_Y, y - rest_y);
input_sync(hdaps_idev);
- mod_timer(&hdaps_timer, jiffies + HDAPS_POLL_PERIOD);
-
-out:
+out_lock:
mutex_unlock(&hdaps_mtx);
+out:
+ mod_timer(&hdaps_timer, jiffies + HDAPS_POLL_PERIOD);
}
-
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