From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-Id: <20120105224402.884277415@clark.kroah.org> Date: Thu, 05 Jan 2012 14:44:54 -0800 From: Greg KH To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Alex Deucher , Dave Airlie Subject: [69/73] drm/radeon/kms/atom: fix possible segfault in pm setup In-Reply-To: <20120105224632.GA14659@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.0-stable review patch. If anyone has any objections, please let me know. ------------------ Content-Length: 1216 Lines: 36 From: =?UTF-8?q?Alexander=20M=C3=BCller?= commit 4376eee92e5a8332b470040e672ea99cd44c826a upstream. If we end up with no power states, don't look up current vddc. fixes: https://bugs.freedesktop.org/show_bug.cgi?id=44130 agd5f: fix patch formatting Signed-off-by: Alex Deucher Signed-off-by: Dave Airlie Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/radeon/radeon_atombios.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) --- a/drivers/gpu/drm/radeon/radeon_atombios.c +++ b/drivers/gpu/drm/radeon/radeon_atombios.c @@ -2568,7 +2568,11 @@ void radeon_atombios_get_power_modes(str rdev->pm.current_power_state_index = rdev->pm.default_power_state_index; rdev->pm.current_clock_mode_index = 0; - rdev->pm.current_vddc = rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.voltage; + if (rdev->pm.default_power_state_index >= 0) + rdev->pm.current_vddc = + rdev->pm.power_state[rdev->pm.default_power_state_index].clock_info[0].voltage.voltage; + else + rdev->pm.current_vddc = 0; } void radeon_atom_set_clock_gating(struct radeon_device *rdev, int enable)