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Message-Id: <1434443826-4929-68-git-send-email-lizf@kernel.org> Date: Tue, 16 Jun 2015 16:35:22 +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 3.4 068/172] drm/radeon: do a posting read in si_set_irq From: Alex Deucher <alexander.deucher@....com> 3.4.108-rc1 review patch. If anyone has any objections, please let me know. ------------------ commit 0586915ec10d0ae60de5cd3381ad25a704760402 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/si.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/radeon/si.c b/drivers/gpu/drm/radeon/si.c index e710073..068b21f 100644 --- a/drivers/gpu/drm/radeon/si.c +++ b/drivers/gpu/drm/radeon/si.c @@ -4126,6 +4126,9 @@ int si_init(struct radeon_device *rdev) return -EINVAL; } + /* 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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