kzalloc() is a memory allocation function which may return NULL. It is better to check the return value of it to catch the error in time.

Signed-off-by: QintaoShen unSimple1993@163.com --- drivers/gpu/drm/omapdrm/omap_crtc.c | 3 +++ drivers/gpu/drm/omapdrm/omap_irq.c | 3 +++ 2 files changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c index 06a719c..fcd76ea 100644 --- a/drivers/gpu/drm/omapdrm/omap_crtc.c +++ b/drivers/gpu/drm/omapdrm/omap_crtc.c @@ -166,6 +166,9 @@ void omap_crtc_set_enabled(struct drm_crtc *crtc, bool enable) dispc_mgr_enable(priv->dispc, channel, enable); omap_crtc->enabled = enable;

+ if (!wait) + return ; + ret = omap_irq_wait(dev, wait, msecs_to_jiffies(100)); if (ret) { dev_err(dev->dev, "%s: timeout waiting for %s\n", diff --git a/drivers/gpu/drm/omapdrm/omap_irq.c b/drivers/gpu/drm/omapdrm/omap_irq.c index 4aca14d..a234462 100644 --- a/drivers/gpu/drm/omapdrm/omap_irq.c +++ b/drivers/gpu/drm/omapdrm/omap_irq.c @@ -45,6 +45,9 @@ struct omap_irq_wait * omap_irq_wait_init(struct drm_device *dev, struct omap_irq_wait *wait = kzalloc(sizeof(*wait), GFP_KERNEL); unsigned long flags;

+ if (!wait) + return NULL; + init_waitqueue_head(&wait->wq); wait->irqmask = irqmask; wait->count = count;