drm/radeon/kms/atom: make sure tables are valid (v2)

Check that atom cmd and data tables are valid
before using them.

(v2)
- fix some whitespace errors noticed by Rafał Miłecki
- check a few more cases
Signed-off-by: NAlex Deucher <alexdeucher@gmail.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/atom.c

@@ -1295,12 +1295,16 @@ void atom_destroy(struct atom_context *ctx)
 	kfree(ctx);
 }
 
-void atom_parse_data_header(struct atom_context *ctx, int index,
+bool atom_parse_data_header(struct atom_context *ctx, int index,
 			    uint16_t * size, uint8_t * frev, uint8_t * crev,
 			    uint16_t * data_start)
 {
 	int offset = index * 2 + 4;
 	int idx = CU16(ctx->data_table + offset);
+	u16 *mdt = (u16 *)(ctx->bios + ctx->data_table + 4);
+
+	if (!mdt[index])
+		return false;
 
 	if (size)
 		*size = CU16(idx);
@@ -1309,31 +1313,34 @@ void atom_parse_data_header(struct atom_context *ctx, int index,
 	if (crev)
 		*crev = CU8(idx + 3);
 	*data_start = idx;
-	return;
+	return true;
 }
 
-void atom_parse_cmd_header(struct atom_context *ctx, int index, uint8_t * frev,
+bool atom_parse_cmd_header(struct atom_context *ctx, int index, uint8_t * frev,
 			   uint8_t * crev)
 {
 	int offset = index * 2 + 4;
 	int idx = CU16(ctx->cmd_table + offset);
+	u16 *mct = (u16 *)(ctx->bios + ctx->cmd_table + 4);
+
+	if (!mct[index])
+		return false;
 
 	if (frev)
 		*frev = CU8(idx + 2);
 	if (crev)
 		*crev = CU8(idx + 3);
-	return;
+	return true;
 }
 
 int atom_allocate_fb_scratch(struct atom_context *ctx)
 {
 	int index = GetIndexIntoMasterTable(DATA, VRAM_UsageByFirmware);
 	uint16_t data_offset;
-	int usage_bytes;
+	int usage_bytes = 0;
 	struct _ATOM_VRAM_USAGE_BY_FIRMWARE *firmware_usage;
 
-	atom_parse_data_header(ctx, index, NULL, NULL, NULL, &data_offset);
-
+	if (atom_parse_data_header(ctx, index, NULL, NULL, NULL, &data_offset)) {
 		firmware_usage = (struct _ATOM_VRAM_USAGE_BY_FIRMWARE *)(ctx->bios + data_offset);
 
 		DRM_DEBUG("atom firmware requested %08x %dkb\n",
@@ -1341,6 +1348,7 @@ int atom_allocate_fb_scratch(struct atom_context *ctx)
 			  firmware_usage->asFirmwareVramReserveInfo[0].usFirmwareUseInKb);
 
 		usage_bytes = firmware_usage->asFirmwareVramReserveInfo[0].usFirmwareUseInKb * 1024;
+	}
 	if (usage_bytes == 0)
 		usage_bytes = 20 * 1024;
 	/* allocate some scratch memory */

drivers/gpu/drm/radeon/atom.h

@@ -143,8 +143,10 @@ struct atom_context *atom_parse(struct card_info *, void *);
 int atom_execute_table(struct atom_context *, int, uint32_t *);
 int atom_asic_init(struct atom_context *);
 void atom_destroy(struct atom_context *);
-void atom_parse_data_header(struct atom_context *ctx, int index, uint16_t *size, uint8_t *frev, uint8_t *crev, uint16_t *data_start);
-void atom_parse_cmd_header(struct atom_context *ctx, int index, uint8_t *frev, uint8_t *crev);
+bool atom_parse_data_header(struct atom_context *ctx, int index, uint16_t *size,
+			    uint8_t *frev, uint8_t *crev, uint16_t *data_start);
+bool atom_parse_cmd_header(struct atom_context *ctx, int index,
+			   uint8_t *frev, uint8_t *crev);
 int atom_allocate_fb_scratch(struct atom_context *ctx);
 #include "atom-types.h"
 #include "atombios.h"

drivers/gpu/drm/radeon/atombios_crtc.c

@@ -541,8 +541,9 @@ static u32 atombios_adjust_pll(struct drm_crtc *crtc,
 		int index;
 
 		index = GetIndexIntoMasterTable(COMMAND, AdjustDisplayPll);
-		atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev,
-				      &crev);
+		if (!atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev,
+					   &crev))
+			return adjusted_clock;
 
 		memset(&args, 0, sizeof(args));
 
@@ -630,8 +631,9 @@ static void atombios_crtc_set_dcpll(struct drm_crtc *crtc)
 	memset(&args, 0, sizeof(args));
 
 	index = GetIndexIntoMasterTable(COMMAND, SetPixelClock);
-	atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev,
-			      &crev);
+	if (!atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev,
+				   &crev))
+		return;
 
 	switch (frev) {
 	case 1:
@@ -705,8 +707,9 @@ static void atombios_crtc_set_pll(struct drm_crtc *crtc, struct drm_display_mode
 			   &ref_div, &post_div);
 
 	index = GetIndexIntoMasterTable(COMMAND, SetPixelClock);
-	atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev,
-			      &crev);
+	if (!atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev,
+				   &crev))
+		return;
 
 	switch (frev) {
 	case 1:

drivers/gpu/drm/radeon/radeon_atombios.c

@@ -75,11 +75,9 @@ static inline struct radeon_i2c_bus_rec radeon_lookup_i2c_gpio(struct radeon_dev
 	memset(&i2c, 0, sizeof(struct radeon_i2c_bus_rec));
 	i2c.valid = false;
 
-	atom_parse_data_header(ctx, index, NULL, NULL, NULL, &data_offset);
-
+	if (atom_parse_data_header(ctx, index, NULL, NULL, NULL, &data_offset)) {
 		i2c_info = (struct _ATOM_GPIO_I2C_INFO *)(ctx->bios + data_offset);
 
-
 		for (i = 0; i < ATOM_MAX_SUPPORTED_DEVICE; i++) {
 			gpio = &i2c_info->asGPIO_Info[i];
 
@@ -117,6 +115,7 @@ static inline struct radeon_i2c_bus_rec radeon_lookup_i2c_gpio(struct radeon_dev
 				break;
 			}
 		}
+	}
 
 	return i2c;
 }
@@ -135,11 +134,11 @@ static inline struct radeon_gpio_rec radeon_lookup_gpio(struct radeon_device *rd
 	memset(&gpio, 0, sizeof(struct radeon_gpio_rec));
 	gpio.valid = false;
 
-	atom_parse_data_header(ctx, index, &size, NULL, NULL, &data_offset);
-
+	if (atom_parse_data_header(ctx, index, &size, NULL, NULL, &data_offset)) {
 		gpio_info = (struct _ATOM_GPIO_PIN_LUT *)(ctx->bios + data_offset);
 
-	num_indices = (size - sizeof(ATOM_COMMON_TABLE_HEADER)) / sizeof(ATOM_GPIO_PIN_ASSIGNMENT);
+		num_indices = (size - sizeof(ATOM_COMMON_TABLE_HEADER)) /
+			sizeof(ATOM_GPIO_PIN_ASSIGNMENT);
 
 		for (i = 0; i < num_indices; i++) {
 			pin = &gpio_info->asGPIO_Pin[i];
@@ -151,6 +150,7 @@ static inline struct radeon_gpio_rec radeon_lookup_gpio(struct radeon_device *rd
 				break;
 			}
 		}
+	}
 
 	return gpio;
 }
@@ -395,9 +395,7 @@ bool radeon_get_atom_connector_info_from_object_table(struct drm_device *dev)
 	struct radeon_gpio_rec gpio;
 	struct radeon_hpd hpd;
 
-	atom_parse_data_header(ctx, index, &size, &frev, &crev, &data_offset);
-
-	if (data_offset == 0)
+	if (!atom_parse_data_header(ctx, index, &size, &frev, &crev, &data_offset))
 		return false;
 
 	if (crev < 2)
@@ -449,8 +447,8 @@ bool radeon_get_atom_connector_info_from_object_table(struct drm_device *dev)
 				    GetIndexIntoMasterTable(DATA,
 							    IntegratedSystemInfo);
 
-				atom_parse_data_header(ctx, index, &size, &frev,
-						       &crev, &igp_offset);
+				if (atom_parse_data_header(ctx, index, &size, &frev,
+							   &crev, &igp_offset)) {
 
 					if (crev >= 2) {
 						igp_obj =
@@ -486,6 +484,12 @@ bool radeon_get_atom_connector_info_from_object_table(struct drm_device *dev)
 						object_connector_convert[con_obj_id];
 					connector_object_id = con_obj_id;
 				}
+			} else {
+				igp_lane_info = 0;
+				connector_type =
+				    object_connector_convert[con_obj_id];
+				connector_object_id = con_obj_id;
+			}
 
 			if (connector_type == DRM_MODE_CONNECTOR_Unknown)
 				continue;
@@ -627,7 +631,7 @@ static uint16_t atombios_get_connector_object_id(struct drm_device *dev,
 		uint8_t frev, crev;
 		ATOM_XTMDS_INFO *xtmds;
 
-		atom_parse_data_header(ctx, index, &size, &frev, &crev, &data_offset);
+		if (atom_parse_data_header(ctx, index, &size, &frev, &crev, &data_offset)) {
 			xtmds = (ATOM_XTMDS_INFO *)(ctx->bios + data_offset);
 
 			if (xtmds->ucSupportedLink & ATOM_XTMDS_SUPPORTED_DUALLINK) {
@@ -641,6 +645,9 @@ static uint16_t atombios_get_connector_object_id(struct drm_device *dev,
 				else
 					return CONNECTOR_OBJECT_ID_SINGLE_LINK_DVI_D;
 			}
+		} else
+			return supported_devices_connector_object_id_convert
+				[connector_type];
 	} else {
 		return supported_devices_connector_object_id_convert
 			[connector_type];
@@ -672,7 +679,8 @@ bool radeon_get_atom_connector_info_from_supported_devices_table(struct
 	int i, j, max_device;
 	struct bios_connector bios_connectors[ATOM_MAX_SUPPORTED_DEVICE];
 
-	atom_parse_data_header(ctx, index, &size, &frev, &crev, &data_offset);
+	if (!atom_parse_data_header(ctx, index, &size, &frev, &crev, &data_offset))
+		return false;
 
 	supported_devices =
 	    (union atom_supported_devices *)(ctx->bios + data_offset);
@@ -865,14 +873,11 @@ bool radeon_atom_get_clock_info(struct drm_device *dev)
 	struct radeon_pll *mpll = &rdev->clock.mpll;
 	uint16_t data_offset;
 
-	atom_parse_data_header(mode_info->atom_context, index, NULL, &frev,
-			       &crev, &data_offset);
-
+	if (atom_parse_data_header(mode_info->atom_context, index, NULL,
+				   &frev, &crev, &data_offset)) {
 		firmware_info =
 			(union firmware_info *)(mode_info->atom_context->bios +
 						data_offset);
-
-	if (firmware_info) {
 		/* pixel clocks */
 		p1pll->reference_freq =
 		    le16_to_cpu(firmware_info->info.usReferenceClock);
@@ -1006,13 +1011,10 @@ bool radeon_atombios_sideport_present(struct radeon_device *rdev)
 	u8 frev, crev;
 	u16 data_offset;
 
-	atom_parse_data_header(mode_info->atom_context, index, NULL, &frev,
-			       &crev, &data_offset);
-
+	if (atom_parse_data_header(mode_info->atom_context, index, NULL,
+				   &frev, &crev, &data_offset)) {
 		igp_info = (union igp_info *)(mode_info->atom_context->bios +
 				      data_offset);
-
-	if (igp_info) {
 		switch (crev) {
 		case 1:
 			if (igp_info->info.ucMemoryType & 0xf0)
@@ -1043,14 +1045,12 @@ bool radeon_atombios_get_tmds_info(struct radeon_encoder *encoder,
 	uint16_t maxfreq;
 	int i;
 
-	atom_parse_data_header(mode_info->atom_context, index, NULL, &frev,
-			       &crev, &data_offset);
-
+	if (atom_parse_data_header(mode_info->atom_context, index, NULL,
+				   &frev, &crev, &data_offset)) {
 		tmds_info =
 			(struct _ATOM_TMDS_INFO *)(mode_info->atom_context->bios +
 						   data_offset);
 
-	if (tmds_info) {
 		maxfreq = le16_to_cpu(tmds_info->usMaxFrequency);
 		for (i = 0; i < 4; i++) {
 			tmds->tmds_pll[i].freq =
@@ -1099,13 +1099,11 @@ static struct radeon_atom_ss *radeon_atombios_get_ss_info(struct
 	if (id > ATOM_MAX_SS_ENTRY)
 		return NULL;
 
-	atom_parse_data_header(mode_info->atom_context, index, NULL, &frev,
-			       &crev, &data_offset);
-
+	if (atom_parse_data_header(mode_info->atom_context, index, NULL,
+				   &frev, &crev, &data_offset)) {
 		ss_info =
 			(struct _ATOM_SPREAD_SPECTRUM_INFO *)(mode_info->atom_context->bios + data_offset);
 
-	if (ss_info) {
 		ss =
 		    kzalloc(sizeof(struct radeon_atom_ss), GFP_KERNEL);
 
@@ -1146,13 +1144,10 @@ struct radeon_encoder_atom_dig *radeon_atombios_get_lvds_info(struct
 	uint8_t frev, crev;
 	struct radeon_encoder_atom_dig *lvds = NULL;
 
-	atom_parse_data_header(mode_info->atom_context, index, NULL, &frev,
-			       &crev, &data_offset);
-
+	if (atom_parse_data_header(mode_info->atom_context, index, NULL,
+				   &frev, &crev, &data_offset)) {
 		lvds_info =
 			(union lvds_info *)(mode_info->atom_context->bios + data_offset);
-
-	if (lvds_info) {
 		lvds =
 		    kzalloc(sizeof(struct radeon_encoder_atom_dig), GFP_KERNEL);
 
@@ -1228,11 +1223,11 @@ radeon_atombios_get_primary_dac_info(struct radeon_encoder *encoder)
 	uint8_t bg, dac;
 	struct radeon_encoder_primary_dac *p_dac = NULL;
 
-	atom_parse_data_header(mode_info->atom_context, index, NULL, &frev, &crev, &data_offset);
+	if (atom_parse_data_header(mode_info->atom_context, index, NULL,
+				   &frev, &crev, &data_offset)) {
+		dac_info = (struct _COMPASSIONATE_DATA *)
+			(mode_info->atom_context->bios + data_offset);
 
-	dac_info = (struct _COMPASSIONATE_DATA *)(mode_info->atom_context->bios + data_offset);
-
-	if (dac_info) {
 		p_dac = kzalloc(sizeof(struct radeon_encoder_primary_dac), GFP_KERNEL);
 
 		if (!p_dac)
@@ -1257,7 +1252,9 @@ bool radeon_atom_get_tv_timings(struct radeon_device *rdev, int index,
 	u8 frev, crev;
 	u16 data_offset, misc;
 
-	atom_parse_data_header(mode_info->atom_context, data_index, NULL, &frev, &crev, &data_offset);
+	if (!atom_parse_data_header(mode_info->atom_context, data_index, NULL,
+				    &frev, &crev, &data_offset))
+		return false;
 
 	switch (crev) {
 	case 1:
@@ -1349,9 +1346,11 @@ radeon_atombios_get_tv_info(struct radeon_device *rdev)
 	struct _ATOM_ANALOG_TV_INFO *tv_info;
 	enum radeon_tv_std tv_std = TV_STD_NTSC;
 
-	atom_parse_data_header(mode_info->atom_context, index, NULL, &frev, &crev, &data_offset);
+	if (atom_parse_data_header(mode_info->atom_context, index, NULL,
+				   &frev, &crev, &data_offset)) {
 
-	tv_info = (struct _ATOM_ANALOG_TV_INFO *)(mode_info->atom_context->bios + data_offset);
+		tv_info = (struct _ATOM_ANALOG_TV_INFO *)
+			(mode_info->atom_context->bios + data_offset);
 
 		switch (tv_info->ucTV_BootUpDefaultStandard) {
 		case ATOM_TV_NTSC:
@@ -1391,6 +1390,7 @@ radeon_atombios_get_tv_info(struct radeon_device *rdev)
 			DRM_INFO("Unknown TV standard; defaulting to NTSC\n");
 			break;
 		}
+	}
 	return tv_std;
 }
 
@@ -1407,11 +1407,12 @@ radeon_atombios_get_tv_dac_info(struct radeon_encoder *encoder)
 	uint8_t bg, dac;
 	struct radeon_encoder_tv_dac *tv_dac = NULL;
 
-	atom_parse_data_header(mode_info->atom_context, index, NULL, &frev, &crev, &data_offset);
+	if (atom_parse_data_header(mode_info->atom_context, index, NULL,
+				   &frev, &crev, &data_offset)) {
 
-	dac_info = (struct _COMPASSIONATE_DATA *)(mode_info->atom_context->bios + data_offset);
+		dac_info = (struct _COMPASSIONATE_DATA *)
+			(mode_info->atom_context->bios + data_offset);
 
-	if (dac_info) {
 		tv_dac = kzalloc(sizeof(struct radeon_encoder_tv_dac), GFP_KERNEL);
 
 		if (!tv_dac)
@@ -1479,13 +1480,11 @@ void radeon_atombios_get_power_modes(struct radeon_device *rdev)
 	int state_index = 0, mode_index = 0;
 	struct radeon_i2c_bus_rec i2c_bus;
 
-	atom_parse_data_header(mode_info->atom_context, index, NULL, &frev, &crev, &data_offset);
-
-	power_info = (union power_info *)(mode_info->atom_context->bios + data_offset);
-
 	rdev->pm.default_power_state = NULL;
 
-	if (power_info) {
+	if (atom_parse_data_header(mode_info->atom_context, index, NULL,
+				   &frev, &crev, &data_offset)) {
+		power_info = (union power_info *)(mode_info->atom_context->bios + data_offset);
 		if (frev < 4) {
 			/* add the i2c bus for thermal/fan chip */
 			if (power_info->info.ucOverdriveThermalController > 0) {

drivers/gpu/drm/radeon/radeon_display.c

@@ -368,10 +368,9 @@ static bool radeon_setup_enc_conn(struct drm_device *dev)
 
 	if (rdev->bios) {
 		if (rdev->is_atom_bios) {
-			if (rdev->family >= CHIP_R600)
-				ret = radeon_get_atom_connector_info_from_object_table(dev);
-			else
 			ret = radeon_get_atom_connector_info_from_supported_devices_table(dev);
+			if (ret == false)
+				ret = radeon_get_atom_connector_info_from_object_table(dev);
 		} else {
 			ret = radeon_get_legacy_connector_info_from_bios(dev);
 			if (ret == false)

drivers/gpu/drm/radeon/radeon_encoders.c

@@ -519,7 +519,8 @@ atombios_digital_setup(struct drm_encoder *encoder, int action)
 		break;
 	}
 
-	atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev, &crev);
+	if (!atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev, &crev))
+		return;
 
 	switch (frev) {
 	case 1:
@@ -725,7 +726,8 @@ atombios_dig_encoder_setup(struct drm_encoder *encoder, int action)
 	}
 	num = dig->dig_encoder + 1;
 
-	atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev, &crev);
+	if (!atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev, &crev))
+		return;
 
 	args.v1.ucAction = action;
 	args.v1.usPixelClock = cpu_to_le16(radeon_encoder->pixel_clock / 10);
@@ -813,7 +815,8 @@ atombios_dig_transmitter_setup(struct drm_encoder *encoder, int action, uint8_t
 		}
 	}
 
-	atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev, &crev);
+	if (!atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev, &crev))
+		return;
 
 	args.v1.ucAction = action;
 	if (action == ATOM_TRANSMITTER_ACTION_INIT) {
@@ -1103,7 +1106,8 @@ atombios_set_encoder_crtc_source(struct drm_encoder *encoder)
 
 	memset(&args, 0, sizeof(args));
 
-	atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev, &crev);
+	if (!atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev, &crev))
+		return;
 
 	switch (frev) {
 	case 1:
@@ -1411,7 +1415,8 @@ atombios_dac_load_detect(struct drm_encoder *encoder, struct drm_connector *conn
 
 		memset(&args, 0, sizeof(args));
 
-		atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev, &crev);
+		if (!atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev, &crev))
+			return false;
 
 		args.sDacload.ucMisc = 0;
 

drivers/gpu/drm/radeon/rs690.c

@@ -58,40 +58,42 @@ static void rs690_gpu_init(struct radeon_device *rdev)
 	}
 }
 
+union igp_info {
+	struct _ATOM_INTEGRATED_SYSTEM_INFO info;
+	struct _ATOM_INTEGRATED_SYSTEM_INFO_V2 info_v2;
+};
+
 void rs690_pm_info(struct radeon_device *rdev)
 {
 	int index = GetIndexIntoMasterTable(DATA, IntegratedSystemInfo);
-	struct _ATOM_INTEGRATED_SYSTEM_INFO *info;
-	struct _ATOM_INTEGRATED_SYSTEM_INFO_V2 *info_v2;
-	void *ptr;
+	union igp_info *info;
 	uint16_t data_offset;
 	uint8_t frev, crev;
 	fixed20_12 tmp;
 
-	atom_parse_data_header(rdev->mode_info.atom_context, index, NULL,
-			       &frev, &crev, &data_offset);
-	ptr = rdev->mode_info.atom_context->bios + data_offset;
-	info = (struct _ATOM_INTEGRATED_SYSTEM_INFO *)ptr;
-	info_v2 = (struct _ATOM_INTEGRATED_SYSTEM_INFO_V2 *)ptr;
+	if (atom_parse_data_header(rdev->mode_info.atom_context, index, NULL,
+				   &frev, &crev, &data_offset)) {
+		info = (union igp_info *)(rdev->mode_info.atom_context->bios + data_offset);
+
 		/* Get various system informations from bios */
 		switch (crev) {
 		case 1:
 			tmp.full = rfixed_const(100);
-		rdev->pm.igp_sideport_mclk.full = rfixed_const(info->ulBootUpMemoryClock);
+			rdev->pm.igp_sideport_mclk.full = rfixed_const(info->info.ulBootUpMemoryClock);
 			rdev->pm.igp_sideport_mclk.full = rfixed_div(rdev->pm.igp_sideport_mclk, tmp);
-		rdev->pm.igp_system_mclk.full = rfixed_const(le16_to_cpu(info->usK8MemoryClock));
-		rdev->pm.igp_ht_link_clk.full = rfixed_const(le16_to_cpu(info->usFSBClock));
-		rdev->pm.igp_ht_link_width.full = rfixed_const(info->ucHTLinkWidth);
+			rdev->pm.igp_system_mclk.full = rfixed_const(le16_to_cpu(info->info.usK8MemoryClock));
+			rdev->pm.igp_ht_link_clk.full = rfixed_const(le16_to_cpu(info->info.usFSBClock));
+			rdev->pm.igp_ht_link_width.full = rfixed_const(info->info.ucHTLinkWidth);
 			break;
 		case 2:
 			tmp.full = rfixed_const(100);
-		rdev->pm.igp_sideport_mclk.full = rfixed_const(info_v2->ulBootUpSidePortClock);
+			rdev->pm.igp_sideport_mclk.full = rfixed_const(info->info_v2.ulBootUpSidePortClock);
 			rdev->pm.igp_sideport_mclk.full = rfixed_div(rdev->pm.igp_sideport_mclk, tmp);
-		rdev->pm.igp_system_mclk.full = rfixed_const(info_v2->ulBootUpUMAClock);
+			rdev->pm.igp_system_mclk.full = rfixed_const(info->info_v2.ulBootUpUMAClock);
 			rdev->pm.igp_system_mclk.full = rfixed_div(rdev->pm.igp_system_mclk, tmp);
-		rdev->pm.igp_ht_link_clk.full = rfixed_const(info_v2->ulHTLinkFreq);
+			rdev->pm.igp_ht_link_clk.full = rfixed_const(info->info_v2.ulHTLinkFreq);
 			rdev->pm.igp_ht_link_clk.full = rfixed_div(rdev->pm.igp_ht_link_clk, tmp);
-		rdev->pm.igp_ht_link_width.full = rfixed_const(le16_to_cpu(info_v2->usMinHTLinkWidth));
+			rdev->pm.igp_ht_link_width.full = rfixed_const(le16_to_cpu(info->info_v2.usMinHTLinkWidth));
 			break;
 		default:
 			tmp.full = rfixed_const(100);
@@ -106,6 +108,18 @@ void rs690_pm_info(struct radeon_device *rdev)
 			DRM_ERROR("No integrated system info for your GPU, using safe default\n");
 			break;
 		}
+	} else {
+		tmp.full = rfixed_const(100);
+		/* We assume the slower possible clock ie worst case */
+		/* DDR 333Mhz */
+		rdev->pm.igp_sideport_mclk.full = rfixed_const(333);
+		/* FIXME: system clock ? */
+		rdev->pm.igp_system_mclk.full = rfixed_const(100);
+		rdev->pm.igp_system_mclk.full = rfixed_div(rdev->pm.igp_system_mclk, tmp);
+		rdev->pm.igp_ht_link_clk.full = rfixed_const(200);
+		rdev->pm.igp_ht_link_width.full = rfixed_const(8);
+		DRM_ERROR("No integrated system info for your GPU, using safe default\n");
+	}
 	/* Compute various bandwidth */
 	/* k8_bandwidth = (memory_clk / 2) * 2 * 8 * 0.5 = memory_clk * 4  */
 	tmp.full = rfixed_const(4);