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Message-Id: <cb2786ba7ced08c6cc48131bfcd407172bfc6b89.1428411004.git.jslaby@suse.cz> Date: Tue, 7 Apr 2015 14:50:00 +0200 From: Jiri Slaby <jslaby@...e.cz> To: stable@...r.kernel.org Cc: linux-kernel@...r.kernel.org, Alex Deucher <alexander.deucher@....com>, Jiri Slaby <jslaby@...e.cz> Subject: [PATCH 3.12 031/155] drm/radeon: do a posting read in rs600_set_irq From: Alex Deucher <alexander.deucher@....com> 3.12-stable review patch. If anyone has any objections, please let me know. =============== commit 54acf107e4e66d1f4a697e08a7f60dba9fcf07c3 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: Jiri Slaby <jslaby@...e.cz> --- drivers/gpu/drm/radeon/rs600.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/radeon/rs600.c b/drivers/gpu/drm/radeon/rs600.c index bbe84591f159..dcb119571f11 100644 --- a/drivers/gpu/drm/radeon/rs600.c +++ b/drivers/gpu/drm/radeon/rs600.c @@ -636,6 +636,10 @@ int rs600_irq_set(struct radeon_device *rdev) WREG32(R_007D18_DC_HOT_PLUG_DETECT2_INT_CONTROL, hpd2); if (ASIC_IS_DCE2(rdev)) WREG32(R_007408_HDMI0_AUDIO_PACKET_CONTROL, hdmi0); + + /* posting read */ + RREG32(R_000040_GEN_INT_CNTL); + return 0; } -- 2.3.4 -- 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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