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| author | Maya Erez <qca_merez@qca.qualcomm.com> | 2016-05-16 21:23:31 +0200 |
|---|---|---|
| committer | Kalle Valo <kvalo@qca.qualcomm.com> | 2016-05-28 10:19:13 +0200 |
| commit | ab6d7cc3eab4093caf91ba8b27590c4080d7d01c (patch) | |
| tree | d5e936d8fe4d24ebb9b56893e1f8584b49ad2f20 | |
| parent | wil6210: fix race conditions between TX send and completion (diff) | |
| download | linux-ab6d7cc3eab4093caf91ba8b27590c4080d7d01c.tar.xz linux-ab6d7cc3eab4093caf91ba8b27590c4080d7d01c.zip | |
wil6210: guarantee safe access to rx descriptors shared memory
add memory barrier after allocating new rx descriptors, before
updating the hwtail.
This will guarantee that all writes to descriptors (shared memory)
are done before committing them to HW.
Signed-off-by: Maya Erez <qca_merez@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
| -rw-r--r-- | drivers/net/wireless/ath/wil6210/txrx.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/wil6210/txrx.c b/drivers/net/wireless/ath/wil6210/txrx.c index fa6ea24a1309..3909af171bad 100644 --- a/drivers/net/wireless/ath/wil6210/txrx.c +++ b/drivers/net/wireless/ath/wil6210/txrx.c @@ -544,6 +544,12 @@ static int wil_rx_refill(struct wil6210_priv *wil, int count) break; } } + + /* make sure all writes to descriptors (shared memory) are done before + * committing them to HW + */ + wmb(); + wil_w(wil, v->hwtail, v->swtail); return rc; |