diff options
| author | Sean Wang <sean.wang@mediatek.com> | 2019-03-18 23:58:33 +0300 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2019-04-23 19:09:08 +0300 |
| commit | 637c8e9013912f3161260bcaf74a184440aae363 (patch) | |
| tree | 521ef661a9569b9a8879a8eb643eef8e4f7f7640 /drivers/bluetooth | |
| parent | afa8d3160add52e79c1d022ce22d20528d462910 (diff) | |
| download | linux-637c8e9013912f3161260bcaf74a184440aae363.tar.xz | |
Bluetooth: btmtksdio: fix uninitialized symbol errors in btmtksdio_rx_packet
Fixed all the below warnings. They would probably cause the following
error handling path would use the uninitialized value and then produce
unexpected behavior.
drivers/bluetooth/btmtksdio.c:470:2: warning: ‘old_len’ may be used
uninitialized in this function [-Wmaybe-uninitialized]
print_hex_dump(KERN_ERR, "err sdio rx: ", DUMP_PREFIX_NONE, 4, 1,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
old_data, old_len, true);
~~~~~~~~~~~~~~~~~~~~~~~~
drivers/bluetooth/btmtksdio.c:376:15: note: ‘old_len’ was declared here
unsigned int old_len;
^~~~~~~
drivers/bluetooth/btmtksdio.c:470:2: warning: ‘old_data’ may be used
uninitialized in this function [-Wmaybe-uninitialized]
print_hex_dump(KERN_ERR, "err sdio rx: ", DUMP_PREFIX_NONE, 4, 1,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
old_data, old_len, true);
~~~~~~~~~~~~~~~~~~~~~~~~
drivers/bluetooth/btmtksdio.c:375:17: note: ‘old_data’ was declared here
unsigned char *old_data;
^~~~~~~~
v2: Remove old_len and old_data because the error path for sdio_readsb also
seems wrong. And change the prefix from "mediatek" to "btmtksdio".
Fixes: d74eef2834b5 ("Bluetooth: mediatek: add support for MediaTek MT7663S and MT7668S SDIO devices")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Reported-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'drivers/bluetooth')
| -rw-r--r-- | drivers/bluetooth/btmtksdio.c | 10 |
1 files changed, 0 insertions, 10 deletions
diff --git a/drivers/bluetooth/btmtksdio.c b/drivers/bluetooth/btmtksdio.c index befe43f9a34a..7d0d1cb93b0e 100644 --- a/drivers/bluetooth/btmtksdio.c +++ b/drivers/bluetooth/btmtksdio.c @@ -372,8 +372,6 @@ static int btmtksdio_rx_packet(struct btmtksdio_dev *bdev, u16 rx_size) const struct h4_recv_pkt *pkts = mtk_recv_pkts; int pkts_count = ARRAY_SIZE(mtk_recv_pkts); struct mtkbtsdio_hdr *sdio_hdr; - unsigned char *old_data; - unsigned int old_len; int err, i, pad_size; struct sk_buff *skb; u16 dlen; @@ -392,12 +390,6 @@ static int btmtksdio_rx_packet(struct btmtksdio_dev *bdev, u16 rx_size) if (err < 0) goto err_kfree_skb; - /* Keep old data for dump the content in case of some error is - * caught in the following packet parsing. - */ - old_data = skb->data; - old_len = skb->len; - bdev->hdev->stat.byte_rx += rx_size; sdio_hdr = (void *)skb->data; @@ -467,8 +459,6 @@ static int btmtksdio_rx_packet(struct btmtksdio_dev *bdev, u16 rx_size) return 0; err_kfree_skb: - print_hex_dump(KERN_ERR, "err sdio rx: ", DUMP_PREFIX_NONE, 4, 1, - old_data, old_len, true); kfree_skb(skb); return err; |