wil6210: protect wil_vring_fini_tx in parallel to tx completions

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napi_synchronize is called before releasing the vring, with the
assumption that setting txdata->enabled to 0 will prevent handling
of this vring in the next scheduled napi.
To guarantee this assumption, a memory barrier is added after disabling
the txdata.
In addition, as the ctx is zeroed in wil_tx_complete after this
descriptor is handled (protected by wmb), ctx needs to be checked
before releasing this descriptor in wil_vring_free.

Signed-off-by: Maya Erez <qca_merez@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

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Maya Erez 2016-05-16 22:23:32 +03:00 • committed by Kalle Valo

parent ab6d7cc3ea

commit 34b8886e50

1 changed files with 14 additions and 0 deletions

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drivers/net/wireless/ath/wil6210/txrx.c

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