Commit 3a69adfe5617 ("drm/radeon: drop oland quirks") removed
quirks for Oland but also caused a regression where M270 GPUs
would go into a lock-up when OpenGL intensive applications were used.
This reverts the change only for the M270 and fixes the lock-ups.

Signed-off-by: Umang Raghuvanshi <u...@umangis.me>
---
 drivers/gpu/drm/radeon/si_dpm.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/radeon/si_dpm.c b/drivers/gpu/drm/radeon/si_dpm.c
index d12b8978142f..c2c129eef3c4 100644
--- a/drivers/gpu/drm/radeon/si_dpm.c
+++ b/drivers/gpu/drm/radeon/si_dpm.c
@@ -2984,6 +2984,11 @@ static void si_apply_state_adjust_rules(struct 
radeon_device *rdev,
                    (rdev->pdev->device == 0x6667)) {
                        max_sclk = 75000;
                }
+       } else if (rdev->family == CHIP_OLAND && rdev->pdev->device == 0x6604 &&
+                  rdev->pdev->revision == 0) {
+               // Fix max_sclk and max_mclk for the Radeon R7 M270
+               max_sclk = 75000;
+               max_mclk = 80000;
        }
 
        if (rps->vce_active) {
-- 
2.12.0


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