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gpu: host1x: Check for valid host1x pointer

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Under rare circumstances it can happen that the host1x driver's .probe()
doesn't finish properly, in which case the device's driver-specific data
will not be set. Instead of crashing in such a situation, propagate the
error to callers of the host1x_get_drm_data() function.

Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding 2013-09-03 08:50:39 +02:00
parent 745cecc07c
commit 03c961ba6d
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/host1x/dev.c
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@ -43,7 +43,7 @@ void host1x_set_drm_data(struct device *dev, void *data)
void *host1x_get_drm_data(struct device *dev)
{
struct host1x *host1x = dev_get_drvdata(dev);
return host1x->drm_data;
return host1x ? host1x->drm_data : NULL;
}
void host1x_sync_writel(struct host1x *host1x, u32 v, u32 r)