From 1783e4bf6f4e5c3b13c09aff24da7dcc69fb3e2f Mon Sep 17 00:00:00 2001 From: Thomas Renninger Date: Wed, 23 Mar 2011 15:14:09 +0000 Subject: [PATCH] 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 CC: Alexander.Deucher@amd.com CC: dri-devel@lists.freedesktop.org Reviewed-by: Alex Deucher Signed-off-by: Dave Airlie --- drivers/gpu/drm/radeon/radeon_pm.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c index 2aed03bde4b2..08de669e025a 100644 --- a/drivers/gpu/drm/radeon/radeon_pm.c +++ b/drivers/gpu/drm/radeon/radeon_pm.c @@ -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);