1. 24 Sep, 2020 4 commits
    • Qinglang Miao's avatar
    • Andreas Färber's avatar
      rtw88: Fix potential probe error handling race with wow firmware loading · ac4bac99
      Andreas Färber authored
      If rtw_core_init() fails to load the wow firmware, rtw_core_deinit()
      will not get called to clean up the regular firmware.
      
      Ensure that an error loading the wow firmware does not produce an oops
      for the regular firmware by waiting on its completion to be signalled
      before returning. Also release the loaded firmware.
      
      Fixes: c8e5695e ("rtw88: load wowlan firmware if wowlan is supported")
      Cc: Chin-Yen Lee <timlee@realtek.com>
      Cc: Yan-Hsuan Chuang <yhchuang@realtek.com>
      Signed-off-by: default avatarAndreas Färber <afaerber@suse.de>
      Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
      Link: https://lore.kernel.org/r/20200920132621.26468-3-afaerber@suse.de
      ac4bac99
    • Andreas Färber's avatar
      rtw88: Fix probe error handling race with firmware loading · ecda9cda
      Andreas Färber authored
      In case of rtw8822be, a probe failure after successful rtw_core_init()
      has been observed to occasionally lead to an oops from rtw_load_firmware_cb():
      
      [    3.924268] pci 0001:01:00.0: [10ec:b822] type 00 class 0xff0000
      [    3.930531] pci 0001:01:00.0: reg 0x10: [io  0x0000-0x00ff]
      [    3.936360] pci 0001:01:00.0: reg 0x18: [mem 0x00000000-0x0000ffff 64bit]
      [    3.944042] pci 0001:01:00.0: supports D1 D2
      [    3.948438] pci 0001:01:00.0: PME# supported from D0 D1 D2 D3hot D3cold
      [    3.957312] pci 0001:01:00.0: BAR 2: no space for [mem size 0x00010000 64bit]
      [    3.964645] pci 0001:01:00.0: BAR 2: failed to assign [mem size 0x00010000 64bit]
      [    3.972332] pci 0001:01:00.0: BAR 0: assigned [io  0x10000-0x100ff]
      [    3.986240] rtw_8822be 0001:01:00.0: enabling device (0000 -> 0001)
      [    3.992735] rtw_8822be 0001:01:00.0: failed to map pci memory
      [    3.998638] rtw_8822be 0001:01:00.0: failed to request pci io region
      [    4.005166] rtw_8822be 0001:01:00.0: failed to setup pci resources
      [    4.011580] rtw_8822be: probe of 0001:01:00.0 failed with error -12
      [    4.018827] cfg80211: Loading compiled-in X.509 certificates for regulatory database
      [    4.029121] cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
      [    4.050828] Unable to handle kernel paging request at virtual address edafeaac9607952c
      [    4.058975] Mem abort info:
      [    4.058980]   ESR = 0x96000004
      [    4.058990]   EC = 0x25: DABT (current EL), IL = 32 bits
      [    4.070353]   SET = 0, FnV = 0
      [    4.073487]   EA = 0, S1PTW = 0
      [    4.073501] dw-apb-uart 98007800.serial: forbid DMA for kernel console
      [    4.076723] Data abort info:
      [    4.086415]   ISV = 0, ISS = 0x00000004
      [    4.087731] Freeing unused kernel memory: 1792K
      [    4.090391]   CM = 0, WnR = 0
      [    4.098091] [edafeaac9607952c] address between user and kernel address ranges
      [    4.105418] Internal error: Oops: 96000004 [#1] PREEMPT SMP
      [    4.111129] Modules linked in:
      [    4.114275] CPU: 1 PID: 31 Comm: kworker/1:1 Not tainted 5.9.0-rc5-next-20200915+ #700
      [    4.122386] Hardware name: Realtek Saola EVB (DT)
      [    4.127223] Workqueue: events request_firmware_work_func
      [    4.132676] pstate: 60000005 (nZCv daif -PAN -UAO BTYPE=--)
      [    4.138393] pc : rtw_load_firmware_cb+0x54/0xbc
      [    4.143040] lr : request_firmware_work_func+0x44/0xb4
      [    4.148217] sp : ffff800010133d70
      [    4.151616] x29: ffff800010133d70 x28: 0000000000000000
      [    4.157069] x27: 0000000000000000 x26: 0000000000000000
      [    4.162520] x25: 0000000000000000 x24: 0000000000000000
      [    4.167971] x23: ffff00007ac21908 x22: ffff00007ebb2100
      [    4.173424] x21: ffff00007ad35880 x20: edafeaac96079504
      [    4.178877] x19: ffff00007ad35870 x18: 0000000000000000
      [    4.184328] x17: 00000000000044d8 x16: 0000000000004310
      [    4.189780] x15: 0000000000000800 x14: 00000000ef006305
      [    4.195231] x13: ffffffff00000000 x12: ffffffffffffffff
      [    4.200682] x11: 0000000000000020 x10: 0000000000000003
      [    4.206135] x9 : 0000000000000000 x8 : ffff00007e73f680
      [    4.211585] x7 : 0000000000000000 x6 : ffff80001119b588
      [    4.217036] x5 : ffff00007e649c80 x4 : ffff00007e649c80
      [    4.222487] x3 : ffff80001119b588 x2 : ffff8000108d1718
      [    4.227940] x1 : ffff800011bd5000 x0 : ffff00007ac21600
      [    4.233391] Call trace:
      [    4.235906]  rtw_load_firmware_cb+0x54/0xbc
      [    4.240198]  request_firmware_work_func+0x44/0xb4
      [    4.245027]  process_one_work+0x178/0x1e4
      [    4.249142]  worker_thread+0x1d0/0x268
      [    4.252989]  kthread+0xe8/0xf8
      [    4.256127]  ret_from_fork+0x10/0x18
      [    4.259800] Code: f94013f5 a8c37bfd d65f03c0 f9000260 (f9401681)
      [    4.266049] ---[ end trace f822ebae1a8545c2 ]---
      
      To avoid this, wait on the completion callbacks in rtw_core_deinit()
      before releasing firmware and continuing teardown.
      
      Note that rtw_wait_firmware_completion() was introduced with
      c8e5695e ("rtw88: load wowlan firmware
      if wowlan is supported"), so backports to earlier branches may need to
      inline wait_for_completion(&rtwdev->fw.completion) instead.
      
      Fixes: e3037485 ("rtw88: new Realtek 802.11ac driver")
      Fixes: c8e5695e ("rtw88: load wowlan firmware if wowlan is supported")
      Cc: Yan-Hsuan Chuang <yhchuang@realtek.com>
      Signed-off-by: default avatarAndreas Färber <afaerber@suse.de>
      Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
      Link: https://lore.kernel.org/r/20200920132621.26468-2-afaerber@suse.de
      ecda9cda
    • Zhang Changzhong's avatar
      brcmfmac: check return value of driver_for_each_device() · 72a398a6
      Zhang Changzhong authored
      Fixes the following W=1 kernel build warning(s):
      
      drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c:1576:6: warning:
       variable 'ret' set but not used [-Wunused-but-set-variable]
        1576 |  int ret;
             |      ^~~
      
      driver_for_each_device() has been declared with __must_check, so the
      return value should be checked.
      Signed-off-by: default avatarZhang Changzhong <zhangchangzhong@huawei.com>
      Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
      Link: https://lore.kernel.org/r/1600481191-14250-1-git-send-email-zhangchangzhong@huawei.com
      72a398a6
  2. 22 Sep, 2020 6 commits
  3. 21 Sep, 2020 11 commits
  4. 16 Sep, 2020 15 commits
  5. 12 Sep, 2020 4 commits