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Message-Id: <1434443826-4929-67-git-send-email-lizf@kernel.org> Date: Tue, 16 Jun 2015 16:35:21 +0800 From: lizf@...nel.org To: stable@...r.kernel.org Cc: linux-kernel@...r.kernel.org, Alex Deucher <alexander.deucher@....com>, Zefan Li <lizefan@...wei.com> Subject: [PATCH 3.4 067/172] drm/radeon: do a posting read in evergreen_set_irq From: Alex Deucher <alexander.deucher@....com> 3.4.108-rc1 review patch. If anyone has any objections, please let me know. ------------------ commit c320bb5f6dc0cb88a811cbaf839303e0a3916a92 upstream. To make sure the writes go through the pci bridge. bug: https://bugzilla.kernel.org/show_bug.cgi?id=90741 Signed-off-by: Alex Deucher <alexander.deucher@....com> Signed-off-by: Zefan Li <lizefan@...wei.com> --- drivers/gpu/drm/radeon/evergreen.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c index 01434ef..c5fe79e 100644 --- a/drivers/gpu/drm/radeon/evergreen.c +++ b/drivers/gpu/drm/radeon/evergreen.c @@ -3474,6 +3474,9 @@ int evergreen_init(struct radeon_device *rdev) } } + /* posting read */ + RREG32(SRBM_STATUS); + return 0; } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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