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linux/drivers/bluetooth
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Neeraj Sanjay Kale 3523747538 Bluetooth: btnxpuart: Fix random crash seen while removing driver 
This fixes the random kernel crash seen while removing the driver, when
running the load/unload test over multiple iterations.

1) modprobe btnxpuart
2) hciconfig hci0 reset
3) hciconfig (check hci0 interface up with valid BD address)
4) modprobe -r btnxpuart
Repeat steps 1 to 4

The ps_wakeup() call in btnxpuart_close() schedules the psdata->work(),
which gets scheduled after module is removed, causing a kernel crash.

This hidden issue got highlighted after enabling Power Save by default
in 4183a7be77 (Bluetooth: btnxpuart: Enable Power Save feature on
startup)

The new ps_cleanup() deasserts UART break immediately while closing
serdev device, cancels any scheduled ps_work and destroys the ps_lock
mutex.

[   85.884604] Unable to handle kernel paging request at virtual address ffffd4a61638f258
[   85.884624] Mem abort info:
[   85.884625]   ESR = 0x0000000086000007
[   85.884628]   EC = 0x21: IABT (current EL), IL = 32 bits
[   85.884633]   SET = 0, FnV = 0
[   85.884636]   EA = 0, S1PTW = 0
[   85.884638]   FSC = 0x07: level 3 translation fault
[   85.884642] swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000041dd0000
[   85.884646] [ffffd4a61638f258] pgd=1000000095fff003, p4d=1000000095fff003, pud=100000004823d003, pmd=100000004823e003, pte=0000000000000000
[   85.884662] Internal error: Oops: 0000000086000007 [#1] PREEMPT SMP
[   85.890932] Modules linked in: algif_hash algif_skcipher af_alg overlay fsl_jr_uio caam_jr caamkeyblob_desc caamhash_desc caamalg_desc crypto_engine authenc libdes crct10dif_ce polyval_ce polyval_generic snd_soc_imx_spdif snd_soc_imx_card snd_soc_ak5558 snd_soc_ak4458 caam secvio error snd_soc_fsl_spdif snd_soc_fsl_micfil snd_soc_fsl_sai snd_soc_fsl_utils gpio_ir_recv rc_core fuse [last unloaded: btnxpuart(O)]
[   85.927297] CPU: 1 PID: 67 Comm: kworker/1:3 Tainted: G           O       6.1.36+g937b1be4345a #1
[   85.936176] Hardware name: FSL i.MX8MM EVK board (DT)
[   85.936182] Workqueue: events 0xffffd4a61638f380
[   85.936198] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[   85.952817] pc : 0xffffd4a61638f258
[   85.952823] lr : 0xffffd4a61638f258
[   85.952827] sp : ffff8000084fbd70
[   85.952829] x29: ffff8000084fbd70 x28: 0000000000000000 x27: 0000000000000000
[   85.963112] x26: ffffd4a69133f000 x25: ffff4bf1c8540990 x24: ffff4bf215b87305
[   85.963119] x23: ffff4bf215b87300 x22: ffff4bf1c85409d0 x21: ffff4bf1c8540970
[   85.977382] x20: 0000000000000000 x19: ffff4bf1c8540880 x18: 0000000000000000
[   85.977391] x17: 0000000000000000 x16: 0000000000000133 x15: 0000ffffe2217090
[   85.977399] x14: 0000000000000001 x13: 0000000000000133 x12: 0000000000000139
[   85.977407] x11: 0000000000000001 x10: 0000000000000a60 x9 : ffff8000084fbc50
[   85.977417] x8 : ffff4bf215b7d000 x7 : ffff4bf215b83b40 x6 : 00000000000003e8
[   85.977424] x5 : 00000000410fd030 x4 : 0000000000000000 x3 : 0000000000000000
[   85.977432] x2 : 0000000000000000 x1 : ffff4bf1c4265880 x0 : 0000000000000000
[   85.977443] Call trace:
[   85.977446]  0xffffd4a61638f258
[   85.977451]  0xffffd4a61638f3e8
[   85.977455]  process_one_work+0x1d4/0x330
[   85.977464]  worker_thread+0x6c/0x430
[   85.977471]  kthread+0x108/0x10c
[   85.977476]  ret_from_fork+0x10/0x20
[   85.977488] Code: bad PC value
[   85.977491] ---[ end trace 0000000000000000 ]---

Preset since v6.9.11
Fixes: 86d55f124b ("Bluetooth: btnxpuart: Deasset UART break before closing serdev device")
Signed-off-by: Neeraj Sanjay Kale <neeraj.sanjaykale@nxp.com>
Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
2024-08-23 15:56:04 -04:00
..
ath3k.c Bluetooth: ath3k: Fix multiple issues reported by checkpatch.pl 2024-05-14 10:51:05 -04:00
bcm203x.c Bluetooth: bcm203x: remove superfluous header files 2022-03-18 17:12:09 +01:00
bfusb.c Bluetooth: bfusb: fix division by zero in send path 2021-10-25 15:04:46 +02:00
bluecard_cs.c Bluetooth: Use fallthrough pseudo-keyword 2020-07-10 19:09:42 +02:00
bpa10x.c Bluetooth: bpa10x: change return value 2019-09-04 16:11:46 +02:00
bt3c_cs.c Bluetooth: bt3c_cs: Fix obsolete function 2018-09-27 12:57:39 +02:00
btbcm.c Bluetooth: btbcm: Use devm_kstrdup() 2024-03-06 17:24:06 -05:00
btbcm.h Bluetooth: hci_bcm: Add support for FW loading in autobaud mode 2022-07-21 17:04:38 -07:00
btintel_pcie.c Bluetooth: HCI: Invert LE State quirk to be opt-out rather then opt-in 2024-08-15 13:07:55 -04:00
btintel_pcie.h Bluetooth: btintel_pcie: Refactor and code cleanup 2024-05-14 10:58:30 -04:00
btintel.c Bluetooth: btintel: Allow configuring drive strength of BRI 2024-08-23 15:56:03 -04:00
btintel.h Bluetooth: btintel: Add firmware ID to firmware name 2024-07-14 21:34:45 -04:00
btmrvl_debugfs.c treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_390.RULE 2022-06-10 14:51:36 +02:00
btmrvl_drv.h treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_390.RULE 2022-06-10 14:51:36 +02:00
btmrvl_main.c Bluetooth: HCI: Remove HCI_AMP support 2024-05-14 10:54:49 -04:00
btmrvl_sdio.c Bluetooth: btmrvl_sdio: drop driver owner initialization 2024-04-04 11:09:12 +02:00
btmrvl_sdio.h treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_390.RULE 2022-06-10 14:51:36 +02:00
btmtk.c Bluetooth: btmtk: Fix btmtk.c undefined reference build error 2024-07-26 10:54:02 -04:00
btmtk.h Bluetooth: btmtk: remove #ifdef around declarations 2024-07-26 10:56:54 -04:00
btmtksdio.c Bluetooth: HCI: Invert LE State quirk to be opt-out rather then opt-in 2024-08-15 13:07:55 -04:00
btmtkuart.c Bluetooth: btmtk: move btusb_mtk_hci_wmt_sync to btmtk.c 2024-07-15 10:11:46 -04:00
btnxpuart.c Bluetooth: btnxpuart: Fix random crash seen while removing driver 2024-08-23 15:56:04 -04:00
btqca.c Bluetooth: qca: Fix error code in qca_read_fw_build_info() 2024-05-14 10:51:09 -04:00
btqca.h Bluetooth: qca: clean up defines 2024-05-14 10:51:07 -04:00
btqcomsmd.c Bluetooth: btqcomsmd: Convert to platform remove callback returning void 2024-05-14 10:51:03 -04:00
btrsi.c Bluetooth: HCI: Remove HCI_AMP support 2024-05-14 10:54:49 -04:00
btrtl.c Bluetooth: HCI: Invert LE State quirk to be opt-out rather then opt-in 2024-08-15 13:07:55 -04:00
btrtl.h Bluetooth: btrtl: Add Realtek devcoredump support 2023-08-11 11:35:14 -07:00
btsdio.c Bluetooth: HCI: Remove HCI_AMP support 2024-05-14 10:54:49 -04:00
btusb.c Bluetooth: HCI: Invert LE State quirk to be opt-out rather then opt-in 2024-08-15 13:07:55 -04:00
dtl1_cs.c
h4_recv.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
hci_ag6xx.c Bluetooth: hci_uart: Remove redundant assignment to fw_ptr 2021-06-26 07:52:41 +02:00
hci_ath.c Bluetooth: hci_uart: check for missing tty operations 2019-07-31 13:17:33 -07:00
hci_bcm4377.c Bluetooth: hci_bcm4377: Add BCM4388 support 2024-07-14 21:34:34 -04:00
hci_bcm.c Bluetooth: hci_bcm: Limit bcm43455 baudrate to 2000000 2024-05-14 10:51:05 -04:00
hci_bcsp.c treewide: Convert del_timer*() to timer_shutdown*() 2022-12-25 13:38:09 -08:00
hci_h4.c Bluetooth: hci_h4: Fix padding calculation error within h4_recv_buf() 2021-11-16 13:57:25 +01:00
hci_h5.c Bluetooth: btrtl: fix out of bounds memory access 2024-03-06 17:26:21 -05:00
hci_intel.c Bluetooth: hci_intel: Fix multiple issues reported by checkpatch.pl 2024-05-14 10:51:04 -04:00
hci_ldisc.c Bluetooth: Use sizeof(*pointer) instead of sizeof(type) 2024-07-14 21:34:28 -04:00
hci_ll.c Bluetooth: hci_ll: drop of_match_ptr for ID table 2023-04-23 21:49:03 -07:00
hci_mrvl.c Bluetooth: hci_mrvl: Add serdev support for 88W8997 2023-04-23 21:45:29 -07:00
hci_nokia.c Bluetooth/nokia: Remove unused struct 'hci_nokia_radio_hdr' 2024-07-14 21:33:33 -04:00
hci_qca.c Bluetooth: HCI: Invert LE State quirk to be opt-out rather then opt-in 2024-08-15 13:07:55 -04:00
hci_serdev.c Bluetooth: HCI: Remove HCI_AMP support 2024-05-14 10:54:49 -04:00
hci_uart.h Bluetooth: HCI: Remove HCI_AMP support 2024-05-14 10:54:49 -04:00
hci_vhci.c Bluetooth: HCI: Invert LE State quirk to be opt-out rather then opt-in 2024-08-15 13:07:55 -04:00
Kconfig Bluetooth: btmtk: Fix btmtk.c undefined reference build error harder 2024-07-26 10:56:05 -04:00
Makefile Bluetooth: btintel_pcie: Add support for PCIe transport 2024-05-14 10:54:56 -04:00
virtio_bt.c virtio: rename virtio_find_vqs_info() to virtio_find_vqs() 2024-07-17 05:20:58 -04:00