linux-kernel - [ 28/50] drm/radeon/dpm: off by one in si_set_mc_special

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Message-Id: <20131016174401.750553420@linuxfoundation.org>
Date:	Wed, 16 Oct 2013 10:45:14 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
	Alex Deucher <alexander.deucher@....com>
Subject: [ 28/50] drm/radeon/dpm: off by one in si_set_mc_special_registers()

3.11-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@...cle.com>

commit 5fd9c581862a4874c0bdaf16231d8873832bbb99 upstream.

These checks should be ">=" instead of ">".  j is used as an offset into
the table->mc_reg_address[] array and that has
SMC_SISLANDS_MC_REGISTER_ARRAY_SIZE (16) elements.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/radeon/si_dpm.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/gpu/drm/radeon/si_dpm.c
+++ b/drivers/gpu/drm/radeon/si_dpm.c
@@ -5174,7 +5174,7 @@ static int si_set_mc_special_registers(s
 					table->mc_reg_table_entry[k].mc_data[j] |= 0x100;
 			}
 			j++;
-			if (j > SMC_SISLANDS_MC_REGISTER_ARRAY_SIZE)
+			if (j >= SMC_SISLANDS_MC_REGISTER_ARRAY_SIZE)
 				return -EINVAL;
 
 			if (!pi->mem_gddr5) {
@@ -5184,7 +5184,7 @@ static int si_set_mc_special_registers(s
 					table->mc_reg_table_entry[k].mc_data[j] =
 						(table->mc_reg_table_entry[k].mc_data[i] & 0xffff0000) >> 16;
 				j++;
-				if (j > SMC_SISLANDS_MC_REGISTER_ARRAY_SIZE)
+				if (j >= SMC_SISLANDS_MC_REGISTER_ARRAY_SIZE)
 					return -EINVAL;
 			}
 			break;
@@ -5197,7 +5197,7 @@ static int si_set_mc_special_registers(s
 					(temp_reg & 0xffff0000) |
 					(table->mc_reg_table_entry[k].mc_data[i] & 0x0000ffff);
 			j++;
-			if (j > SMC_SISLANDS_MC_REGISTER_ARRAY_SIZE)
+			if (j >= SMC_SISLANDS_MC_REGISTER_ARRAY_SIZE)
 				return -EINVAL;
 			break;
 		default:


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