linux-kernel - [PATCH 3.13 081/120] drm/radeon/runpm: dont runtime suspend non-PX cards

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Date:	Tue, 11 Feb 2014 11:05:22 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Alex Deucher <alexander.deucher@....com>
Subject: [PATCH 3.13 081/120] drm/radeon/runpm: dont runtime suspend non-PX cards

3.13-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alex Deucher <alexander.deucher@....com>

commit 9babd35ad72af631547c7ca294bc2e931cc40e58 upstream.

Prevent runtime suspend of non-PX GPUs.  Runtime suspend is
not what we want in those cases.

Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/radeon/radeon_drv.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/gpu/drm/radeon/radeon_drv.c
+++ b/drivers/gpu/drm/radeon/radeon_drv.c
@@ -400,6 +400,9 @@ static int radeon_pmops_runtime_suspend(
 	if (radeon_runtime_pm == 0)
 		return -EINVAL;
 
+	if (radeon_runtime_pm == -1 && !radeon_is_px())
+		return -EINVAL;
+
 	drm_dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
 	drm_kms_helper_poll_disable(drm_dev);
 	vga_switcheroo_set_dynamic_switch(pdev, VGA_SWITCHEROO_OFF);
@@ -422,6 +425,9 @@ static int radeon_pmops_runtime_resume(s
 	if (radeon_runtime_pm == 0)
 		return -EINVAL;
 
+	if (radeon_runtime_pm == -1 && !radeon_is_px())
+		return -EINVAL;
+
 	drm_dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
 
 	pci_set_power_state(pdev, PCI_D0);


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