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mt76: fix a leaked reference by adding a missing of_node_put 

The call to of_find_node_by_phandle returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last
usage.

Detected by coccinelle with the following warnings:
./drivers/net/wireless/mediatek/mt76/eeprom.c:58:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 48, but without a corresponding object release within this function.
./drivers/net/wireless/mediatek/mt76/eeprom.c:61:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 48, but without a corresponding object release within this function.
./drivers/net/wireless/mediatek/mt76/eeprom.c:67:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 48, but without a corresponding object release within this function.
./drivers/net/wireless/mediatek/mt76/eeprom.c:70:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 48, but without a corresponding object release within this function.
./drivers/net/wireless/mediatek/mt76/eeprom.c:72:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 48, but without a corresponding object release within this function.

Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Cc: Felix Fietkau <nbd@nbd.name>
Cc: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mediatek@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
hifive-unleashed-5.1
Wen Yang 2019-02-22 15:15:40 +08:00 committed by Kalle Valo
parent 52f8865712
commit 34e022d8b7
1 changed files with 16 additions and 8 deletions
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24
drivers/net/wireless/mediatek/mt76/eeprom.c
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@ -54,22 +54,30 @@ mt76_get_of_eeprom(struct mt76_dev *dev, int len)
part = np->name;
mtd = get_mtd_device_nm(part);
if (IS_ERR(mtd))
return PTR_ERR(mtd);
if (IS_ERR(mtd)) {
ret = PTR_ERR(mtd);
goto out_put_node;
}
if (size <= sizeof(*list))
return -EINVAL;
if (size <= sizeof(*list)) {
ret = -EINVAL;
goto out_put_node;
}
offset = be32_to_cpup(list);
ret = mtd_read(mtd, offset, len, &retlen, dev->eeprom.data);
put_mtd_device(mtd);
if (ret)
return ret;
goto out_put_node;
if (retlen < len)
return -EINVAL;
if (retlen < len) {
ret = -EINVAL;
goto out_put_node;
}
return 0;
out_put_node:
of_node_put(np);
return ret;
#else
return -ENOENT;
#endif