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drm/radeon: gcc fixes for radeon_atombios.c

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Newer versions of gcc seem to wander off into the
weeds when dealing with variable sizes arrays in
structs.  Rather than indexing the arrays, use
pointer arithmetic.

See bugs:
https://bugs.freedesktop.org/show_bug.cgi?id=66932
https://bugs.freedesktop.org/show_bug.cgi?id=66972
https://bugs.freedesktop.org/show_bug.cgi?id=66945

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2013-08-20 18:40:46 -04:00
parent 6a3808b823
commit 607f2c2791
1 changed files with 28 additions and 14 deletions
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42
drivers/gpu/drm/radeon/radeon_atombios.c
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@ -163,8 +163,8 @@ static struct radeon_i2c_bus_rec radeon_lookup_i2c_gpio(struct radeon_device *rd
num_indices = (size - sizeof(ATOM_COMMON_TABLE_HEADER)) /
sizeof(ATOM_GPIO_I2C_ASSIGMENT);
gpio = &i2c_info->asGPIO_Info[0];
for (i = 0; i < num_indices; i++) {
gpio = &i2c_info->asGPIO_Info[i];
radeon_lookup_i2c_gpio_quirks(rdev, gpio, i);
@ -172,6 +172,8 @@ static struct radeon_i2c_bus_rec radeon_lookup_i2c_gpio(struct radeon_device *rd
i2c = radeon_get_bus_rec_for_i2c_gpio(gpio);
break;
}
gpio = (ATOM_GPIO_I2C_ASSIGMENT *)
((u8 *)gpio + sizeof(ATOM_GPIO_I2C_ASSIGMENT));
}
}
@ -195,9 +197,8 @@ void radeon_atombios_i2c_init(struct radeon_device *rdev)
num_indices = (size - sizeof(ATOM_COMMON_TABLE_HEADER)) /
sizeof(ATOM_GPIO_I2C_ASSIGMENT);
gpio = &i2c_info->asGPIO_Info[0];
for (i = 0; i < num_indices; i++) {
gpio = &i2c_info->asGPIO_Info[i];
radeon_lookup_i2c_gpio_quirks(rdev, gpio, i);
i2c = radeon_get_bus_rec_for_i2c_gpio(gpio);
@ -206,6 +207,8 @@ void radeon_atombios_i2c_init(struct radeon_device *rdev)
sprintf(stmp, "0x%x", i2c.i2c_id);
rdev->i2c_bus[i] = radeon_i2c_create(rdev->ddev, &i2c, stmp);
}
gpio = (ATOM_GPIO_I2C_ASSIGMENT *)
((u8 *)gpio + sizeof(ATOM_GPIO_I2C_ASSIGMENT));
}
}
}
@ -230,8 +233,8 @@ static struct radeon_gpio_rec radeon_lookup_gpio(struct radeon_device *rdev,
num_indices = (size - sizeof(ATOM_COMMON_TABLE_HEADER)) /
sizeof(ATOM_GPIO_PIN_ASSIGNMENT);
pin = gpio_info->asGPIO_Pin;
for (i = 0; i < num_indices; i++) {
pin = &gpio_info->asGPIO_Pin[i];
if (id == pin->ucGPIO_ID) {
gpio.id = pin->ucGPIO_ID;
gpio.reg = le16_to_cpu(pin->usGpioPin_AIndex) * 4;
@ -239,6 +242,8 @@ static struct radeon_gpio_rec radeon_lookup_gpio(struct radeon_device *rdev,
gpio.valid = true;
break;
}
pin = (ATOM_GPIO_PIN_ASSIGNMENT *)
((u8 *)pin + sizeof(ATOM_GPIO_PIN_ASSIGNMENT));
}
}
@ -3413,10 +3418,11 @@ int radeon_atom_get_max_voltage(struct radeon_device *rdev,
ATOM_VOLTAGE_FORMULA_V2 *formula =
&voltage_object->v2.asFormula;
if (formula->ucNumOfVoltageEntries) {
VOLTAGE_LUT_ENTRY *lut = (VOLTAGE_LUT_ENTRY *)
((u8 *)&formula->asVIDAdjustEntries[0] +
(sizeof(VOLTAGE_LUT_ENTRY) * (formula->ucNumOfVoltageEntries - 1)));
*max_voltage =
le16_to_cpu(formula->asVIDAdjustEntries[
formula->ucNumOfVoltageEntries - 1
].usVoltageValue);
le16_to_cpu(lut->usVoltageValue);
return 0;
}
}
@ -3576,11 +3582,13 @@ int radeon_atom_get_voltage_table(struct radeon_device *rdev,
if (voltage_object) {
ATOM_VOLTAGE_FORMULA_V2 *formula =
&voltage_object->v2.asFormula;
VOLTAGE_LUT_ENTRY *lut;
if (formula->ucNumOfVoltageEntries > MAX_VOLTAGE_ENTRIES)
return -EINVAL;
lut = &formula->asVIDAdjustEntries[0];
for (i = 0; i < formula->ucNumOfVoltageEntries; i++) {
voltage_table->entries[i].value =
le16_to_cpu(formula->asVIDAdjustEntries[i].usVoltageValue);
le16_to_cpu(lut->usVoltageValue);
ret = radeon_atom_get_voltage_gpio_settings(rdev,
voltage_table->entries[i].value,
voltage_type,
@ -3588,6 +3596,8 @@ int radeon_atom_get_voltage_table(struct radeon_device *rdev,
&voltage_table->mask_low);
if (ret)
return ret;
lut = (VOLTAGE_LUT_ENTRY *)
((u8 *)lut + sizeof(VOLTAGE_LUT_ENTRY));
}
voltage_table->count = formula->ucNumOfVoltageEntries;
return 0;
@ -3607,13 +3617,17 @@ int radeon_atom_get_voltage_table(struct radeon_device *rdev,
if (voltage_object) {
ATOM_GPIO_VOLTAGE_OBJECT_V3 *gpio =
&voltage_object->v3.asGpioVoltageObj;
VOLTAGE_LUT_ENTRY_V2 *lut;
if (gpio->ucGpioEntryNum > MAX_VOLTAGE_ENTRIES)
return -EINVAL;
lut = &gpio->asVolGpioLut[0];
for (i = 0; i < gpio->ucGpioEntryNum; i++) {
voltage_table->entries[i].value =
le16_to_cpu(gpio->asVolGpioLut[i].usVoltageValue);
le16_to_cpu(lut->usVoltageValue);
voltage_table->entries[i].smio_low =
le32_to_cpu(gpio->asVolGpioLut[i].ulVoltageId);
le32_to_cpu(lut->ulVoltageId);
lut = (VOLTAGE_LUT_ENTRY_V2 *)
((u8 *)lut + sizeof(VOLTAGE_LUT_ENTRY_V2));
}
voltage_table->mask_low = le32_to_cpu(gpio->ulGpioMaskVal);
voltage_table->count = gpio->ucGpioEntryNum;
@ -3739,7 +3753,6 @@ int radeon_atom_get_mclk_range_table(struct radeon_device *rdev,
union vram_info *vram_info;
u32 mem_timing_size = gddr5 ?
sizeof(ATOM_MEMORY_TIMING_FORMAT_V2) : sizeof(ATOM_MEMORY_TIMING_FORMAT);
u8 *p;
memset(mclk_range_table, 0, sizeof(struct atom_memory_clock_range_table));
@ -3758,6 +3771,7 @@ int radeon_atom_get_mclk_range_table(struct radeon_device *rdev,
if (module_index < vram_info->v1_4.ucNumOfVRAMModule) {
ATOM_VRAM_MODULE_V4 *vram_module =
(ATOM_VRAM_MODULE_V4 *)vram_info->v1_4.aVramInfo;
ATOM_MEMORY_TIMING_FORMAT *format;
for (i = 0; i < module_index; i++) {
if (le16_to_cpu(vram_module->usModuleSize) == 0)
@ -3768,11 +3782,11 @@ int radeon_atom_get_mclk_range_table(struct radeon_device *rdev,
mclk_range_table->num_entries = (u8)
((le16_to_cpu(vram_module->usModuleSize) - offsetof(ATOM_VRAM_MODULE_V4, asMemTiming)) /
mem_timing_size);
p = (u8 *)&vram_module->asMemTiming[0];
format = &vram_module->asMemTiming[0];
for (i = 0; i < mclk_range_table->num_entries; i++) {
ATOM_MEMORY_TIMING_FORMAT *format = (ATOM_MEMORY_TIMING_FORMAT *)p;
mclk_range_table->mclk[i] = le32_to_cpu(format->ulClkRange);
p += mem_timing_size;
format = (ATOM_MEMORY_TIMING_FORMAT *)
((u8 *)format + mem_timing_size);
}
} else
return -EINVAL;