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Message-Id: <1434443826-4929-66-git-send-email-lizf@kernel.org> Date: Tue, 16 Jun 2015 16:35:20 +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 3.4 066/172] drm/radeon: do a posting read in r600_set_irq From: Alex Deucher <alexander.deucher@....com> 3.4.108-rc1 review patch. If anyone has any objections, please let me know. ------------------ commit 9d1393f23d5656cdd5f368efd60694d4aeed81d3 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/r600.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c index 1555cd6..9c7062d 100644 --- a/drivers/gpu/drm/radeon/r600.c +++ b/drivers/gpu/drm/radeon/r600.c @@ -3184,6 +3184,9 @@ int r600_irq_set(struct radeon_device *rdev) WREG32(DC_HOT_PLUG_DETECT3_INT_CONTROL, hpd3); } + /* posting read */ + RREG32(R_000E50_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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