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drm: check return values in drm_version

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In drm_version, actually check the results from function calls so that
we're not potentially passing garbage back to userspace.

Signed-off-by: Andres Salomon <dilinger@collabora.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Andres Salomon 2009-11-17 14:41:25 -08:00 committed by Dave Airlie
parent 140a45fc32
commit dad07ca717
1 changed files with 10 additions and 4 deletions
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14
drivers/gpu/drm/drm_drv.c
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@ -403,15 +403,21 @@ static int drm_version(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_version *version = data;
int err;
version->version_major = dev->driver->major;
version->version_minor = dev->driver->minor;
version->version_patchlevel = dev->driver->patchlevel;
drm_copy_field(version->name, &version->name_len, dev->driver->name);
drm_copy_field(version->date, &version->date_len, dev->driver->date);
drm_copy_field(version->desc, &version->desc_len, dev->driver->desc);
err = drm_copy_field(version->name, &version->name_len,
dev->driver->name);
if (!err)
err = drm_copy_field(version->date, &version->date_len,
dev->driver->date);
if (!err)
err = drm_copy_field(version->desc, &version->desc_len,
dev->driver->desc);
return 0;
return err;
}
/**