From: Ryder Lee ryder.lee@mediatek.com
[ Upstream commit 59b27a7d472f100ac8998e15a63c47a03cced12a ]
Check return value of mt7915_mcu_get_eeprom_free_block() first before accessing free_block_num.
Fixes: bbc1d4154ec1 ("mt76: mt7915: add default calibrated data support") Signed-off-by: Ryder Lee ryder.lee@mediatek.com Signed-off-by: Felix Fietkau nbd@nbd.name Signed-off-by: Sasha Levin sashal@kernel.org --- .../wireless/mediatek/mt76/mt7915/eeprom.c | 19 ++++++++++++------- .../net/wireless/mediatek/mt76/mt7915/mcu.c | 10 ++++++---- 2 files changed, 18 insertions(+), 11 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c b/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c index 0bce0ce51be00..f0ec000d46cf7 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c +++ b/drivers/net/wireless/mediatek/mt76/mt7915/eeprom.c @@ -110,18 +110,23 @@ static int mt7915_eeprom_load(struct mt7915_dev *dev) } else { u8 free_block_num; u32 block_num, i; + u32 eeprom_blk_size = MT7915_EEPROM_BLOCK_SIZE;
- mt7915_mcu_get_eeprom_free_block(dev, &free_block_num); - /* efuse info not enough */ + ret = mt7915_mcu_get_eeprom_free_block(dev, &free_block_num); + if (ret < 0) + return ret; + + /* efuse info isn't enough */ if (free_block_num >= 29) return -EINVAL;
/* read eeprom data from efuse */ - block_num = DIV_ROUND_UP(eeprom_size, - MT7915_EEPROM_BLOCK_SIZE); - for (i = 0; i < block_num; i++) - mt7915_mcu_get_eeprom(dev, - i * MT7915_EEPROM_BLOCK_SIZE); + block_num = DIV_ROUND_UP(eeprom_size, eeprom_blk_size); + for (i = 0; i < block_num; i++) { + ret = mt7915_mcu_get_eeprom(dev, i * eeprom_blk_size); + if (ret < 0) + return ret; + } }
return mt7915_check_eeprom(dev); diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c index 8d297e4aa7d43..c4843f4de34ff 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c +++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c @@ -2743,8 +2743,9 @@ int mt7915_mcu_get_eeprom(struct mt7915_dev *dev, u32 offset) int ret; u8 *buf;
- ret = mt76_mcu_send_and_get_msg(&dev->mt76, MCU_EXT_QUERY(EFUSE_ACCESS), &req, - sizeof(req), true, &skb); + ret = mt76_mcu_send_and_get_msg(&dev->mt76, + MCU_EXT_QUERY(EFUSE_ACCESS), + &req, sizeof(req), true, &skb); if (ret) return ret;
@@ -2769,8 +2770,9 @@ int mt7915_mcu_get_eeprom_free_block(struct mt7915_dev *dev, u8 *block_num) struct sk_buff *skb; int ret;
- ret = mt76_mcu_send_and_get_msg(&dev->mt76, MCU_EXT_QUERY(EFUSE_FREE_BLOCK), &req, - sizeof(req), true, &skb); + ret = mt76_mcu_send_and_get_msg(&dev->mt76, + MCU_EXT_QUERY(EFUSE_FREE_BLOCK), + &req, sizeof(req), true, &skb); if (ret) return ret;