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306-mac80211-set-up-the-fwd_skb-dev-for-mesh-forwarding.patch

306-mac80211-set-up-the-fwd_skb-dev-for-mesh-forwarding.patch 2.8 KB
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  1. From: Xing Song <[email protected]>
    2. 

  2. Date: Tue, 23 Nov 2021 11:31:23 +0800
    3. 

  3. Subject: [PATCH] mac80211: set up the fwd_skb->dev for mesh forwarding
    4. 

  4. 

  5. Mesh forwarding requires that the fwd_skb->dev is set up for TX handling,
    6. 

  6. otherwise the following warning will be generated, so set it up for the
    7. 

  7. pending frames.
    8. 

  8. 

  9. [   72.835674 ] WARNING: CPU: 0 PID: 1193 at __skb_flow_dissect+0x284/0x1298
    10. 

  10. [   72.842379 ] Modules linked in: ksmbd pppoe ppp_async l2tp_ppp ...
    11. 

  11. [   72.962020 ] CPU: 0 PID: 1193 Comm: kworker/u5:1 Tainted: P S 5.4.137 #0
    12. 

  12. [   72.969938 ] Hardware name: MT7622_MT7531 RFB (DT)
    13. 

  13. [   72.974659 ] Workqueue: napi_workq napi_workfn
    14. 

  14. [   72.979025 ] pstate: 60000005 (nZCv daif -PAN -UAO)
    15. 

  15. [   72.983822 ] pc : __skb_flow_dissect+0x284/0x1298
    16. 

  16. [   72.988444 ] lr : __skb_flow_dissect+0x54/0x1298
    17. 

  17. [   72.992977 ] sp : ffffffc010c738c0
    18. 

  18. [   72.996293 ] x29: ffffffc010c738c0 x28: 0000000000000000
    19. 

  19. [   73.001615 ] x27: 000000000000ffc2 x26: ffffff800c2eb818
    20. 

  20. [   73.006937 ] x25: ffffffc010a987c8 x24: 00000000000000ce
    21. 

  21. [   73.012259 ] x23: ffffffc010c73a28 x22: ffffffc010a99c60
    22. 

  22. [   73.017581 ] x21: 000000000000ffc2 x20: ffffff80094da800
    23. 

  23. [   73.022903 ] x19: 0000000000000000 x18: 0000000000000014
    24. 

  24. [   73.028226 ] x17: 00000000084d16af x16: 00000000d1fc0bab
    25. 

  25. [   73.033548 ] x15: 00000000715f6034 x14: 000000009dbdd301
    26. 

  26. [   73.038870 ] x13: 00000000ea4dcbc3 x12: 0000000000000040
    27. 

  27. [   73.044192 ] x11: 000000000eb00ff0 x10: 0000000000000000
    28. 

  28. [   73.049513 ] x9 : 000000000eb00073 x8 : 0000000000000088
    29. 

  29. [   73.054834 ] x7 : 0000000000000000 x6 : 0000000000000001
    30. 

  30. [   73.060155 ] x5 : 0000000000000000 x4 : 0000000000000000
    31. 

  31. [   73.065476 ] x3 : ffffffc010a98000 x2 : 0000000000000000
    32. 

  32. [   73.070797 ] x1 : 0000000000000000 x0 : 0000000000000000
    33. 

  33. [   73.076120 ] Call trace:
    34. 

  34. [   73.078572 ]  __skb_flow_dissect+0x284/0x1298
    35. 

  35. [   73.082846 ]  __skb_get_hash+0x7c/0x228
    36. 

  36. [   73.086629 ]  ieee80211_txq_may_transmit+0x7fc/0x17b8 [mac80211]
    37. 

  37. [   73.092564 ]  ieee80211_tx_prepare_skb+0x20c/0x268 [mac80211]
    38. 

  38. [   73.098238 ]  ieee80211_tx_pending+0x144/0x330 [mac80211]
    39. 

  39. [   73.103560 ]  tasklet_action_common.isra.16+0xb4/0x158
    40. 

  40. [   73.108618 ]  tasklet_action+0x2c/0x38
    41. 

  41. [   73.112286 ]  __do_softirq+0x168/0x3b0
    42. 

  42. [   73.115954 ]  do_softirq.part.15+0x88/0x98
    43. 

  43. [   73.119969 ]  __local_bh_enable_ip+0xb0/0xb8
    44. 

  44. [   73.124156 ]  napi_workfn+0x58/0x90
    45. 

  45. [   73.127565 ]  process_one_work+0x20c/0x478
    46. 

  46. [   73.131579 ]  worker_thread+0x50/0x4f0
    47. 

  47. [   73.135249 ]  kthread+0x124/0x128
    48. 

  48. [   73.138484 ]  ret_from_fork+0x10/0x1c
    49. 

  49. 

  50. Signed-off-by: Xing Song <[email protected]>
    51. 

  51. ---
    52. 

  52. 

  53. --- a/net/mac80211/rx.c
    54. 

  54. +++ b/net/mac80211/rx.c
    55. 

  55. @@ -2947,6 +2947,7 @@ ieee80211_rx_h_mesh_fwding(struct ieee80
    56. 

  56.  	if (!fwd_skb)
    57. 

  57.  		goto out;
    58. 

  58.  
    59. 

  59. +	fwd_skb->dev = sdata->dev;
    60. 

  60.  	fwd_hdr =  (struct ieee80211_hdr *) fwd_skb->data;
    61. 

  61.  	fwd_hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_RETRY);
    62. 

  62.  	info = IEEE80211_SKB_CB(fwd_skb);
    63.