OMAP: DSS2: fix omap_dispc_register_isr() fail path

Fix handling of error in omap_dispc_register_isr() in case there are no
free isr slots available.

Reported-by: Ben Tucker <btucker@mpcdata.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/video/omap2/dss/dispc.c b/drivers/video/omap2/dss/dispc.c
index dae9686fb437..4a368c47700e 100644
--- a/drivers/video/omap2/dss/dispc.c
+++ b/drivers/video/omap2/dss/dispc.c
@@ -2831,6 +2831,9 @@ int omap_dispc_register_isr(omap_dispc_isr_t isr, void *arg, u32 mask)
                 break;
         }
 
+        if (ret)
+                goto err;
+
         _omap_dispc_set_irqs();
 
         spin_unlock_irqrestore(&dispc.irq_lock, flags);