[PATCH 2/8] drm: mali-dp: Clear the config_valid flag before using it in wait_event.

From: Brian Starkey
Date: Tue Oct 11 2016 - 10:28:53 EST

From: Liviu Dudau <Liviu.Dudau@xxxxxxx>

config_valid variable is used to signal the activation of the CVAL
request when the vsync interrupt has fired. malidp_set_and_wait_config_valid()
uses the variable in wait_event_interruptible_timeout without clearing it
first, so the wait is skipped.

Signed-off-by: Liviu Dudau <Liviu.Dudau@xxxxxxx>
drivers/gpu/drm/arm/malidp_drv.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/arm/malidp_drv.c b/drivers/gpu/drm/arm/malidp_drv.c
index 7987ebd..f2b1923 100644
--- a/drivers/gpu/drm/arm/malidp_drv.c
+++ b/drivers/gpu/drm/arm/malidp_drv.c
@@ -42,6 +42,7 @@ static int malidp_set_and_wait_config_valid(struct drm_device *drm)
struct malidp_hw_device *hwdev = malidp->dev;
int ret;

+ atomic_set(&malidp->config_valid, 0);
/* don't wait for config_valid flag if we are in config mode */
if (hwdev->in_config_mode(hwdev))