kernel/drivers/net/wireless/intel/iwlwifi/queue, branch linux-6.9.y

wifi: iwlwifi: read txq->read_ptr under lock

2024-03-25T14:23:07Z

If we read txq->read_ptr without lock, we can read the same value twice, then obtain the lock, and reclaim from there to two different places, but crucially reclaim the same entry twice, resulting in the WARN_ONCE() a little later. Fix that by reading txq->read_ptr under lock. Signed-off-by: Johannes Berg Signed-off-by: Miri Korenblit Link: https://msgid.link/20240319100755.bf4c62196504.I978a7ca56c6bd6f1bf42c15aa923ba03366a840b@changeid Signed-off-by: Johannes Berg

net: adopt skb_network_header_len() more broadly

2024-03-04T08:47:06Z

(skb_transport_header(skb) - skb_network_header(skb)) can be replaced by skb_network_header_len(skb) Add a DEBUG_NET_WARN_ON_ONCE() in skb_network_header_len() to catch cases were the transport_header was not set. Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller

wifi: iwlwifi: queue: improve warning for no skb in reclaim

2024-02-08T14:00:49Z

We've seen this warning trigger, and while the reason is probably obvious, I haven't been able to see it yet. Add more information to the warning message to help identify the cause. Also print out both index and SSN for all the messages. Signed-off-by: Johannes Berg Signed-off-by: Miri Korenblit Link: https://msgid.link/20240206175739.581427dc81fc.I9a109d02b4349807dce521c693ecd3516ec58cc0@changeid Signed-off-by: Johannes Berg

wifi: iwlwifi: make TB reallocation a debug message

2024-01-26T08:47:33Z

There's no need to print this, it's a known issue and the workaround works just fine. Make the reallocation message just a debug message. Signed-off-by: Johannes Berg Reviewed-by: Gregory Greenman Signed-off-by: Miri Korenblit Link: https://msgid.link/20240123200528.329d5f2ee7f7.I0bfc6dde17fe2c738129f3aba746c6cba57589f9@changeid Signed-off-by: Johannes Berg

wifi: iwlwifi: empty overflow queue during flush

2023-10-23T10:49:30Z

If a TX queue has no space for new TX frames, the driver will keep these frames in the overflow queue, and during reclaim flow it will retry to send the frames from that queue. But if the reclaim flow was invoked from TX queue flush, we will also TX these frames, which is wrong as we don't want to TX anything after flush. This might also cause assert 0x125F when removing the queue, saying that the driver removes a non-empty queue Fix this by TXing the overflow queue's frames only if we are not in flush queue flow. Fixes: a44509805895 ("iwlwifi: move reclaim flows to the queue file") Signed-off-by: Miri Korenblit Signed-off-by: Gregory Greenman Link: https://lore.kernel.org/r/20231022173519.caf06c8709d9.Ibf664ccb3f952e836f8fa461ea58fc08e5c46e88@changeid Signed-off-by: Johannes Berg

wifi: iwlwifi: queue: fix kernel-doc

2023-09-11T10:36:27Z

Fix the kernel-doc annotations here, adding the trans parameter and fixing the syntax. Signed-off-by: Johannes Berg Signed-off-by: Gregory Greenman Link: https://lore.kernel.org/r/20230830112059.247919faf4fd.I489f8b3b2ebb49a421bd5d76ea0201262134fb67@changeid Signed-off-by: Johannes Berg

wifi: iwlwifi: pcie: point invalid TFDs to invalid data

2023-08-22T11:19:24Z

There are occasionally bugs which cause the device to try to use a TFD that it wasn't supposed to, and these are very hard to diagnose. Fill all unused TFDs with a debug command that immediately causes an error to be detected in these cases. Signed-off-by: Johannes Berg Signed-off-by: Gregory Greenman Link: https://lore.kernel.org/r/20230816104355.10a9af1ca91f.Ifc790d62c52b4bc9a74c9581610af498509f5759@changeid Signed-off-by: Johannes Berg

wifi: iwlwifi: queue: move iwl_txq_gen2_set_tb() up

2023-08-22T11:19:24Z

We need this earlier in the file next, move it up to have an easier to read change, since this moves other things in the diff git generates by default. Signed-off-by: Johannes Berg Signed-off-by: Gregory Greenman Link: https://lore.kernel.org/r/20230816104355.c6d798b600bb.I9b891ee3d3dc67822a28e44941409f5b7cb637cf@changeid Signed-off-by: Johannes Berg

wifi: iwlwifi: pcie: move gen1 TB handling to header

2023-08-22T11:19:24Z

We will need this in another place soon in reclaim and init, so add this function to the queue header file instead. Signed-off-by: Johannes Berg Signed-off-by: Gregory Greenman Link: https://lore.kernel.org/r/20230816104355.52b6f66de219.Ic8403fd098c187fac067977808c0129d96514c91@changeid Signed-off-by: Johannes Berg

wifi: iwlwifi: pcie: clean up gen1/gen2 TFD unmap

2023-08-22T11:19:23Z

This is a bit messy right now, there are functions for both, but then gen1 function can actually deal with both gen1 and gen2, due to the confusion about use_tfh/gen2 cleaned up in the previous patch. Fix the common paths to call the right functions and remove handling of gen2 from the gen1 function. Signed-off-by: Johannes Berg Signed-off-by: Gregory Greenman Link: https://lore.kernel.org/r/20230816104355.baf23841ec5c.I40702e94b25db05e82f935f14548316f8c6429b9@changeid Signed-off-by: Johannes Berg