[PATCH 2/2] Bluetooth: btmtksdio: Fix kernel oops when sdio suspend.

[Marcel Holtmann]

Hi Sean,

> Do not kfree the skb when the skb failed to send with __hci_cmd_sync
> 
> 2435.241210] Call trace:
> [ 2435.241224]  kfree_skb+0x20/0x140
> [ 2435.241240]  btmtksdio_sdio_wakeup+0x8c/0xcc
> [ 2435.241360]  hci_suspend_notifier+0x108/0x184
> [ 2435.241377]  notifier_call_chain_robust+0x58/0xd8
> [ 2435.241390]  blocking_notifier_call_chain_robust+0x54/0x84
> [ 2435.241402]  pm_notifier_call_chain_robust+0x2c/0x4c
> [ 2435.241414]  suspend_prepare+0x40/0x238
> [ 2435.241425]  enter_state+0xec/0x3a8
> [ 2435.241436]  pm_suspend+0x60/0xcc
> [ 2435.241446]  state_store+0xb8/0x114
> [ 2435.241460]  kobj_attr_store+0x18/0x2c
> [ 2435.241473]  sysfs_kf_write+0x44/0x58
> [ 2435.241486]  kernfs_fop_write_iter+0xf4/0x190
> [ 2435.241500]  vfs_write+0x2b0/0x2e4
> [ 2435.241511]  ksys_write+0x80/0xec
> [ 2435.241523]  __arm64_sys_write+0x24/0x30
> [ 2435.241538]  el0_svc_common+0xf0/0x1d8
> [ 2435.241550]  do_el0_svc_compat+0x28/0x54
> [ 2435.241564]  el0_svc_compat+0x10/0x1c
> [ 2435.241574]  el0_sync_compat_handler+0xa8/0xcc
> [ 2435.241586]  el0_sync_compat+0x188/0x1c0
> [ 2435.241606] Code: a9014ff4 910003fd b40002c0 aa0003f3 (b84d4c08)
> [ 2435.241619] ---[ end trace d496539b850baf14 ]---
> 
> Fixes: ce64b3e94919  ("Bluetooth: mt7921s: Support wake on bluetooth")
> Co-developed-by: Sean Wang <sean.wang at mediatek.com>
> Signed-off-by: Sean Wang <sean.wang at mediatek.com>
> Signed-off-by: Yake Yang <yake.yang at mediatek.com>
> ---
> drivers/bluetooth/btmtksdio.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)

patch has been applied to bluetooth-next tree.

Regards

Marcel