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From: Dan Carpenter <dan.carpenter@oracle.com>
To: David Airlie <airlied@linux.ie>, Jammy Zhou <Jammy.Zhou@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>,
	Tom St Denis <tom.stdenis@amd.com>,
	kernel-janitors@vger.kernel.org, Rex Zhu <Rex.Zhu@amd.com>,
	dri-devel@lists.freedesktop.org
Subject: [patch] drm/amd/powerplay: precedence bug in init_non_clock_fields()
Date: Mon, 04 Jan 2016 20:44:24 +0000	[thread overview]
Message-ID: <20160104204424.GD19867@mwanda> (raw)

The cast to uint8_t happens before the right shift so this always sets
.m3arb to zero.  The cast is actually a no-op so we can remove it.

Fixes: 3bace3591493 ('drm/amd/powerplay: add hardware manager sub-component')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
Static analysis stuff.  Not tested.

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c b/drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c
index 1d385f4..9031a44 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c
@@ -735,8 +735,8 @@ static int init_non_clock_fields(struct pp_hwmgr *hwmgr,
 
 	ps->memory.dllOff = (0 != tmp);
 
-	ps->memory.m3arb = (uint8_t)(le32_to_cpu(pnon_clock_info->ulCapsAndSettings) &
-						ATOM_PPLIB_M3ARB_MASK) >> ATOM_PPLIB_M3ARB_SHIFT;
+	ps->memory.m3arb = (le32_to_cpu(pnon_clock_info->ulCapsAndSettings) &
+			    ATOM_PPLIB_M3ARB_MASK) >> ATOM_PPLIB_M3ARB_SHIFT;
 
 	ps->temperatures.min = PP_TEMPERATURE_UNITS_PER_CENTIGRADES *
 				     pnon_clock_info->ucMinTemperature;

WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter@oracle.com>
To: David Airlie <airlied@linux.ie>, Jammy Zhou <Jammy.Zhou@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>,
	Tom St Denis <tom.stdenis@amd.com>,
	kernel-janitors@vger.kernel.org, Rex Zhu <Rex.Zhu@amd.com>,
	dri-devel@lists.freedesktop.org
Subject: [patch] drm/amd/powerplay: precedence bug in init_non_clock_fields()
Date: Mon, 4 Jan 2016 23:44:24 +0300	[thread overview]
Message-ID: <20160104204424.GD19867@mwanda> (raw)

The cast to uint8_t happens before the right shift so this always sets
.m3arb to zero.  The cast is actually a no-op so we can remove it.

Fixes: 3bace3591493 ('drm/amd/powerplay: add hardware manager sub-component')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
Static analysis stuff.  Not tested.

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c b/drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c
index 1d385f4..9031a44 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/processpptables.c
@@ -735,8 +735,8 @@ static int init_non_clock_fields(struct pp_hwmgr *hwmgr,
 
 	ps->memory.dllOff = (0 != tmp);
 
-	ps->memory.m3arb = (uint8_t)(le32_to_cpu(pnon_clock_info->ulCapsAndSettings) &
-						ATOM_PPLIB_M3ARB_MASK) >> ATOM_PPLIB_M3ARB_SHIFT;
+	ps->memory.m3arb = (le32_to_cpu(pnon_clock_info->ulCapsAndSettings) &
+			    ATOM_PPLIB_M3ARB_MASK) >> ATOM_PPLIB_M3ARB_SHIFT;
 
 	ps->temperatures.min = PP_TEMPERATURE_UNITS_PER_CENTIGRADES *
 				     pnon_clock_info->ucMinTemperature;
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             reply	other threads:[~2016-01-04 20:44 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-04 20:44 Dan Carpenter [this message]
2016-01-04 20:44 ` [patch] drm/amd/powerplay: precedence bug in init_non_clock_fields() Dan Carpenter
2016-01-04 21:22 ` Alex Deucher
2016-01-04 21:22   ` Alex Deucher

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