]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
Bluetooth: btmtksdio: fix uninitialized symbol errors in btmtksdio_rx_packet
authorSean Wang <sean.wang@mediatek.com>
Mon, 18 Mar 2019 20:58:33 +0000 (04:58 +0800)
committerMarcel Holtmann <marcel@holtmann.org>
Tue, 23 Apr 2019 16:09:08 +0000 (18:09 +0200)
commit637c8e9013912f3161260bcaf74a184440aae363
tree521ef661a9569b9a8879a8eb643eef8e4f7f7640
parentafa8d3160add52e79c1d022ce22d20528d462910
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>
drivers/bluetooth/btmtksdio.c