wait_for_completion_timeout_interruptible returns long not unsigned long.
an appropriately typed variable is introduced and assignments fixed up.

Fixes: f76ee892a99e ("omapfb: copy omapdss & displays for omapfb")

Signed-off-by: Nicholas Mc Guire <redacted>
---

API non-compliance was located by coccinelle

This is mostly cosmetic since the returned value is only compared 
at present, however if remaining time (completion occurred) where ever 
used, then a signal received would be interpreted as a large remaining 
jiffies left, which would be wrong.

Compile tested with: omap2plus_defconfig (implies CONFIG_FB_OMAP2_DSS)

Patch is against 4.7.0-rc7 (localversion-next -next-20160724)

 drivers/video/fbdev/omap2/omapfb/dss/dispc-compat.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/video/fbdev/omap2/omapfb/dss/dispc-compat.c b/drivers/video/fbdev/omap2/omapfb/dss/dispc-compat.c
index 3691bde..a864608 100644
--- a/drivers/video/fbdev/omap2/omapfb/dss/dispc-compat.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/dispc-compat.c

@@ -644,6 +644,7 @@ int omap_dispc_wait_for_irq_interruptible_timeout(u32 irqmask,
 {
 
 	int r;
+	long time_left;
 	DECLARE_COMPLETION_ONSTACK(completion);
 
 	r = omap_dispc_register_isr(dispc_irq_wait_handler, &completion,

@@ -652,15 +653,15 @@ int omap_dispc_wait_for_irq_interruptible_timeout(u32 irqmask,
 	if (r)
 		return r;
 
-	timeout = wait_for_completion_interruptible_timeout(&completion,
+	time_left = wait_for_completion_interruptible_timeout(&completion,
 			timeout);
 
 	omap_dispc_unregister_isr(dispc_irq_wait_handler, &completion, irqmask);
 
-	if (timeout = 0)
+	if (time_left = 0)
 		return -ETIMEDOUT;
 
-	if (timeout = -ERESTARTSYS)
+	if (time_left = -ERESTARTSYS)
 		return -ERESTARTSYS;
 
 	return 0;

-- 
2.1.4