drm/radeon/dpm: off by one in si_set_mc_special_registers()

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@oracle.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/radeon/si_dpm.c b/drivers/gpu/drm/radeon/si_dpm.c
index 9ace28702c761a196089c7e88442e45b08a3ed16..2332aa1bf93c7c40936710c7e8595c6d49f6514b 100644 (file)
--- a/drivers/gpu/drm/radeon/si_dpm.c
+++ b/drivers/gpu/drm/radeon/si_dpm.c
@@ -5208,7 +5208,7 @@ static int si_set_mc_special_registers(struct radeon_device *rdev,
                                        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) {
@@ -5218,7 +5218,7 @@ static int si_set_mc_special_registers(struct radeon_device *rdev,
                                        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;
@@ -5231,7 +5231,7 @@ static int si_set_mc_special_registers(struct radeon_device *rdev,
                                        (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: