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From: Joe Perches <joe@perches.com>
To: "Michel Dänzer" <michel@daenzer.net>
Cc: "Alex Deucher" <alexander.deucher@amd.com>,
	"Christian König" <christian.koenig@amd.com>,
	dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
Subject: [PATCH 02/11 V2] radeon: evergreen: Fix probable mask then right shift defect
Date: Mon, 27 Oct 2014 07:14:57 -0700	[thread overview]
Message-ID: <1414419297.8884.5.camel@perches.com> (raw)
In-Reply-To: <544E0D0E.6080206@daenzer.net>

Precedence of & and >> is not the same and is not left to right.
shift has higher precedence and should be done after the mask.

Add parentheses around the mask.

Use the already #defined values instead of hardcoding.

Signed-off-by: Joe Perches <joe@perches.com>
---
> I think this should be NUM_SHADER_ENGINES_SHIFT?

(Joe can't type)

exactly right, thanks Michel

 drivers/gpu/drm/radeon/evergreen.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index a31f1ca..a97a685 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -3303,7 +3303,8 @@ static void evergreen_gpu_init(struct radeon_device *rdev)
 	rdev->config.evergreen.tile_config |=
 		((gb_addr_config & 0x30000000) >> 28) << 12;
 
-	num_shader_engines = (gb_addr_config & NUM_SHADER_ENGINES(3) >> 12) + 1;
+	num_shader_engines = ((gb_addr_config & NUM_SHADER_ENGINES_MASK)
+			      >> NUM_SHADER_ENGINES_SHIFT) + 1;
 
 	if ((rdev->family >= CHIP_CEDAR) && (rdev->family <= CHIP_HEMLOCK)) {
 		u32 efuse_straps_4;


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WARNING: multiple messages have this Message-ID (diff)
From: Joe Perches <joe@perches.com>
To: "Michel Dänzer" <michel@daenzer.net>
Cc: "Alex Deucher" <alexander.deucher@amd.com>,
	"Christian König" <christian.koenig@amd.com>,
	linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org
Subject: [PATCH 02/11 V2] radeon: evergreen: Fix probable mask then right shift defect
Date: Mon, 27 Oct 2014 07:14:57 -0700	[thread overview]
Message-ID: <1414419297.8884.5.camel@perches.com> (raw)
In-Reply-To: <544E0D0E.6080206@daenzer.net>

Precedence of & and >> is not the same and is not left to right.
shift has higher precedence and should be done after the mask.

Add parentheses around the mask.

Use the already #defined values instead of hardcoding.

Signed-off-by: Joe Perches <joe@perches.com>
---
> I think this should be NUM_SHADER_ENGINES_SHIFT?

(Joe can't type)

exactly right, thanks Michel

 drivers/gpu/drm/radeon/evergreen.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index a31f1ca..a97a685 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -3303,7 +3303,8 @@ static void evergreen_gpu_init(struct radeon_device *rdev)
 	rdev->config.evergreen.tile_config |=
 		((gb_addr_config & 0x30000000) >> 28) << 12;
 
-	num_shader_engines = (gb_addr_config & NUM_SHADER_ENGINES(3) >> 12) + 1;
+	num_shader_engines = ((gb_addr_config & NUM_SHADER_ENGINES_MASK)
+			      >> NUM_SHADER_ENGINES_SHIFT) + 1;
 
 	if ((rdev->family >= CHIP_CEDAR) && (rdev->family <= CHIP_HEMLOCK)) {
 		u32 efuse_straps_4;



  reply	other threads:[~2014-10-27 14:15 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-10-27  5:24 [PATCH 00/11] treewide: mask then shift defects and style updates Joe Perches
2014-10-27  5:24 ` Joe Perches
2014-10-27  5:24 ` Joe Perches
2014-10-27  5:24 ` [PATCH 01/11] block: nvme-scsi: Fix probable mask then right shift defects Joe Perches
2014-10-27  5:24   ` Joe Perches
2014-11-10 19:33   ` Verma, Vishal L
2014-11-10 19:33     ` Verma, Vishal L
2014-10-27  5:24 ` [PATCH 02/11] radeon: evergreen: " Joe Perches
2014-10-27  5:24   ` Joe Perches
2014-10-27  9:14   ` Michel Dänzer
2014-10-27  9:14     ` Michel Dänzer
2014-10-27 14:14     ` Joe Perches [this message]
2014-10-27 14:14       ` [PATCH 02/11 V2] radeon: evergreen: Fix probable mask then right shift defect Joe Perches
2014-10-28  3:42       ` Michel Dänzer
2014-10-28  3:42         ` Michel Dänzer
2014-10-28 14:06       ` Alex Deucher
2014-10-28 14:06         ` Alex Deucher
2014-10-29  3:03         ` Michel Dänzer
2014-10-29  3:03           ` Michel Dänzer
2014-10-27  5:24 ` [PATCH 03/11] aiptek: Fix probable mask then right shift defects Joe Perches
2014-10-27 14:44   ` Dmitry Torokhov
2014-10-27 17:56     ` Joe Perches
2014-10-27 18:01       ` Dmitry Torokhov
2014-10-27 18:03         ` Joe Perches
2014-10-27  5:25 ` [PATCH 04/11] dvb-net: " Joe Perches
2014-10-27  5:25 ` [PATCH 05/11] cx25840/cx18: Use standard ordering of mask and shift Joe Perches
2014-11-08 13:41   ` Andy Walls
2014-10-27  5:25 ` [PATCH 06/11] wm8350-core: Fix probable mask then right shift defect Joe Perches
2014-10-27 12:47   ` Charles Keepax
2014-11-03 18:02   ` Lee Jones
2014-10-27  5:25 ` [PATCH 07/11] iwlwifi: dvm: " Joe Perches
2014-10-27  6:14   ` Grumbach, Emmanuel
2014-10-27  5:25 ` [PATCH 08/11] ssb: driver_chip_comon_pmu: " Joe Perches
2014-10-27 17:32   ` Michael Büsch
2014-10-27  5:25 ` [PATCH 09/11] tty: ipwireless: Fix probable mask then right shift defects Joe Perches
2014-10-27 13:18   ` David Sterba
2014-10-27 14:17   ` Jiri Kosina
2014-10-28  1:57     ` Greg Kroah-Hartman
2014-10-27  5:25 ` [PATCH 10/11] hwa-hc: Fix probable mask then right shift defect Joe Perches
2014-10-27  5:25 ` [PATCH 11/11] sound: ad1889: Fix probable mask then right shift defects Joe Perches
2014-10-27  7:41   ` Takashi Iwai

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