From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Renninger Subject: [PATCH] drm radeon: Return -EINVAL on wrong pm sysfs access Date: Wed, 23 Mar 2011 16:14:09 +0100 Message-ID: <201103231614.09164.trenn@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mx2.suse.de (cantor2.suse.de [195.135.220.15]) by gabe.freedesktop.org (Postfix) with ESMTP id 901DE9E740 for ; Wed, 23 Mar 2011 08:14:11 -0700 (PDT) List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org Errors-To: dri-devel-bounces+sf-dri-devel=m.gmane.org@lists.freedesktop.org To: dri-devel@lists.freedesktop.org Cc: Alexander.Deucher@amd.com List-Id: dri-devel@lists.freedesktop.org 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 --- drivers/gpu/drm/radeon/radeon_pm.c | 8 +++++--- 1 files changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c index 2aed03b..08de669 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);