Attachment 36497 Details for Bug 28745 – fix div by 0

[patch] fix div by 0

0001-drm-radeon-kms-pm-fix-power-state-indexing-on-igp-ch.patch (text/plain), 1.23 KB, created by Alex Deucher on 2010-06-25 12:08:13 UTC

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Creator: Alex Deucher

Created: 2010-06-25 12:08:13 UTC

Size: 1.23 KB

patch

obsolete

>From 24579913d286b24f1f633cd1d143f9d08d2a895d Mon Sep 17 00:00:00 2001
>From: Alex Deucher <alexdeucher@gmail.com>
>Date: Fri, 25 Jun 2010 15:05:14 -0400
>Subject: [PATCH] drm/radeon/kms/pm: fix power state indexing on igp chips in dynpm mode
>
>Fixes:
>https://bugs.freedesktop.org/show_bug.cgi?id=28745
>
>Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
>---
> drivers/gpu/drm/radeon/r600.c |   11 ++++++++---
> 1 files changed, 8 insertions(+), 3 deletions(-)
>
>diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
>index 0e91871..7f48593 100644
>--- a/drivers/gpu/drm/radeon/r600.c
>+++ b/drivers/gpu/drm/radeon/r600.c
>@@ -130,9 +130,14 @@ void r600_pm_get_dynpm_state(struct radeon_device *rdev)
> 							break;
> 						}
> 					}
>-				} else
>-					rdev->pm.requested_power_state_index =
>-						rdev->pm.current_power_state_index - 1;
>+				} else {
>+					if (rdev->pm.current_power_state_index == 0)
>+						rdev->pm.requested_power_state_index =
>+							rdev->pm.num_power_states - 1;
>+					else
>+						rdev->pm.requested_power_state_index =
>+							rdev->pm.current_power_state_index - 1;
>+				}
> 			}
> 			rdev->pm.requested_clock_mode_index = 0;
> 			/* don't use the power state if crtcs are active and no display flag is set */
>-- 
>1.7.0.1
>

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