When booting Nokia N900 smartphone with v3.12 + omap2plus_defconfig (LOCKDEP enabled) and CONFIG_DISPLAY_PANEL_SONY_ACX565AKM enabled, the following BUG is seen during the boot: [ 7.302154] ===================================== [ 7.307128] [ BUG: bad unlock balance detected! ] [ 7.312103] 3.12.0-los.git-2093492-00120-g5e01dc7 #3 Not tainted [ 7.318450] ------------------------------------- [ 7.323425] kworker/u2:1/12 is trying to release lock (&ddata->mutex) at: [ 7.330657] [<c031b760>] acx565akm_enable+0x12c/0x18c [ 7.335998] but there are no more locks to release! Fix by removing the extra mutex_unlock(). Reported-by: Eduardo Valentin <eduardo.valentin@xxxxxx> Signed-off-by: Aaro Koskinen <aaro.koskinen@xxxxxx> Cc: stable@xxxxxxxxxxxxxxx --- drivers/video/omap2/displays-new/panel-sony-acx565akm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/video/omap2/displays-new/panel-sony-acx565akm.c b/drivers/video/omap2/displays-new/panel-sony-acx565akm.c index e6d56f7..72fe2a8 100644 --- a/drivers/video/omap2/displays-new/panel-sony-acx565akm.c +++ b/drivers/video/omap2/displays-new/panel-sony-acx565akm.c @@ -616,7 +616,7 @@ static int acx565akm_enable(struct omap_dss_device *dssdev) mutex_lock(&ddata->mutex); r = acx565akm_panel_power_on(dssdev); - mutex_unlock(&ddata->mutex); + /* NOTE: acx565akm_panel_power_on() will unlock the mutex. */ if (r) return r; -- 1.8.4.2 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
