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drm radeon: Return -EINVAL on wrong pm sysfs access 

Throw an error if someone tries to fill this with
wrong data, instead of simply ignoring the input.
Now you get:

echo hello >/sys/../power_method
-bash: echo: write error: Invalid argument

Signed-off-by: Thomas Renninger <trenn@suse.de>
CC: Alexander.Deucher@amd.com
CC: dri-devel@lists.freedesktop.org
Reviewed-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Thomas Renninger 2011-03-23 15:14:09 +00:00 committed by Dave Airlie
parent fafcf94e2b
commit 1783e4bf6f
1 changed files with 5 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/gpu/drm/radeon/radeon_pm.c
View File

@ -365,12 +365,14 @@ static ssize_t radeon_set_pm_profile(struct device *dev,
else if (strncmp("high", buf, strlen("high")) == 0)
rdev->pm.profile = PM_PROFILE_HIGH;
else {
DRM_ERROR("invalid power profile!\n");
count = -EINVAL;
goto fail;
}
radeon_pm_update_profile(rdev);
radeon_pm_set_clocks(rdev);
}
} else
count = -EINVAL;
fail:
mutex_unlock(&rdev->pm.mutex);
@ -413,7 +415,7 @@ static ssize_t radeon_set_pm_method(struct device *dev,
mutex_unlock(&rdev->pm.mutex);
cancel_delayed_work_sync(&rdev->pm.dynpm_idle_work);
} else {
DRM_ERROR("invalid power method!\n");
count = -EINVAL;
goto fail;
}
radeon_pm_compute_clocks(rdev);