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61c5a3def9
MediaTek iso data anchor init should be moved to where MediaTek
claims iso data interface.
If there is an unexpected BT usb disconnect during setup flow,
it will cause a NULL pointer crash issue when releasing iso
anchor since the anchor wasn't been init yet. Adjust the position
to do iso data anchor init.
[ 17.137991] pc : usb_kill_anchored_urbs+0x60/0x168
[ 17.137998] lr : usb_kill_anchored_urbs+0x44/0x168
[ 17.137999] sp : ffffffc0890cb5f0
[ 17.138000] x29: ffffffc0890cb5f0 x28: ffffff80bb6c2e80
[ 17.144081] gpio gpiochip0: registered chardev handle for 1 lines
[ 17.148421] x27: 0000000000000000
[ 17.148422] x26: ffffffd301ff4298 x25: 0000000000000003 x24: 00000000000000f0
[ 17.148424] x23: 0000000000000000 x22: 00000000ffffffff x21: 0000000000000001
[ 17.148425] x20: ffffffffffffffd8 x19: ffffff80c0f25560 x18: 0000000000000000
[ 17.148427] x17: ffffffd33864e408 x16: ffffffd33808f7c8 x15: 0000000000200000
[ 17.232789] x14: e0cd73cf80ffffff x13: 50f2137c0a0338c9 x12: 0000000000000001
[ 17.239912] x11: 0000000080150011 x10: 0000000000000002 x9 : 0000000000000001
[ 17.247035] x8 : 0000000000000000 x7 : 0000000000008080 x6 : 8080000000000000
[ 17.254158] x5 : ffffffd33808ebc0 x4 : fffffffe033dcf20 x3 : 0000000080150011
[ 17.261281] x2 : ffffff8087a91400 x1 : 0000000000000000 x0 : ffffff80c0f25588
[ 17.268404] Call trace:
[ 17.270841] usb_kill_anchored_urbs+0x60/0x168
[ 17.275274] btusb_mtk_release_iso_intf+0x2c/0xd8 [btusb (HASH:5afe 6)]
[ 17.284226] btusb_mtk_disconnect+0x14/0x28 [btusb (HASH:5afe 6)]
[ 17.292652] btusb_disconnect+0x70/0x140 [btusb (HASH:5afe 6)]
[ 17.300818] usb_unbind_interface+0xc4/0x240
[ 17.305079] device_release_driver_internal+0x18c/0x258
[ 17.310296] device_release_driver+0x1c/0x30
[ 17.314557] bus_remove_device+0x140/0x160
[ 17.318643] device_del+0x1c0/0x330
[ 17.322121] usb_disable_device+0x80/0x180
[ 17.326207] usb_disconnect+0xec/0x300
[ 17.329948] hub_quiesce+0x80/0xd0
[ 17.333339] hub_disconnect+0x44/0x190
[ 17.337078] usb_unbind_interface+0xc4/0x240
[ 17.341337] device_release_driver_internal+0x18c/0x258
[ 17.346551] device_release_driver+0x1c/0x30
[ 17.350810] usb_driver_release_interface+0x70/0x88
[ 17.355677] proc_ioctl+0x13c/0x228
[ 17.359157] proc_ioctl_default+0x50/0x80
[ 17.363155] usbdev_ioctl+0x830/0xd08
[ 17.366808] __arm64_sys_ioctl+0x94/0xd0
[ 17.370723] invoke_syscall+0x6c/0xf8
[ 17.374377] el0_svc_common+0x84/0xe0
[ 17.378030] do_el0_svc+0x20/0x30
[ 17.381334] el0_svc+0x34/0x60
[ 17.384382] el0t_64_sync_handler+0x88/0xf0
[ 17.388554] el0t_64_sync+0x180/0x188
[ 17.392208] Code: f9400677 f100a2f4 54fffea0 d503201f (b8350288)
[ 17.398289] ---[ end trace 0000000000000000 ]---
Fixes: ceac1cb025 ("Bluetooth: btusb: mediatek: add ISO data transmission functions")
Signed-off-by: Chris Lu <chris.lu@mediatek.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.