From 6a859e09c40f09fd77411ca46d8b6ca1c08444fe Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Thu, 2 Jan 2014 09:07:29 -0300
Subject: [PATCH] [media] omap_vout: avoid sleep_on race
sleep_on and its variants are broken and going away soon. This changes
the omap vout driver to use wait_event_interruptible_timeout instead,
which fixes potential race where the dma is complete before we
schedule.
[hans.verkuil@cisco.com: replaced interruptible_sleep_on_timeout by
wait_event_interruptible_timeout in the commit msg, obvious typo]
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Mauro Carvalho Chehab <m.chehab@samsung.com>
Cc: linux-media@vger.kernel.org
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
---
drivers/media/platform/omap/omap_vout_vrfb.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/media/platform/omap/omap_vout_vrfb.c b/drivers/media/platform/omap/omap_vout_vrfb.c
index cf1c437a8687..62e7e5783ce8 100644
--- a/drivers/media/platform/omap/omap_vout_vrfb.c
+++ b/drivers/media/platform/omap/omap_vout_vrfb.c
@@ -270,7 +270,8 @@ int omap_vout_prepare_vrfb(struct omap_vout_device *vout,
omap_dma_set_global_params(DMA_DEFAULT_ARB_RATE, 0x20, 0);
omap_start_dma(tx->dma_ch);
- interruptible_sleep_on_timeout(&tx->wait, VRFB_TX_TIMEOUT);
+ wait_event_interruptible_timeout(tx->wait, tx->tx_status == 1,
+ VRFB_TX_TIMEOUT);
if (tx->tx_status == 0) {
omap_stop_dma(tx->dma_ch);