iwlwifi: mvm: do not trust NSSN for amsdu sub-frames

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We cannot trust NSSN for AMSDU sub-frames that are not the
last.
The reason is that NSSN advances on the first sub-frame,
and may cause the reorder buffer to advance before all the
sub-frames arrive.
Example:
Reorder buffer contains SN 0 & 2.
We receive AMSDU with SN 1 and NSSN for first sub frame 3.
The result us that driver releases SN 0,1, 2.
When sub-frame 1 arrives - reorder buffer is already ahead and
it will be dropped.
If the last sub-frame is not on this queue - we will get frame
release notification with up to date NSSN.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

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Sara Sharon 2016-04-17 14:15:17 +03:00 • committed by Luca Coelho

parent 4bdd4dfe7a

commit e7e14089e9

1 changed files with 18 additions and 2 deletions

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drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c

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