diff options
| author | Maya Erez <qca_merez@qca.qualcomm.com> | 2016-05-29 08:44:09 +0300 |
|---|---|---|
| committer | Kyle Yan <kyan@codeaurora.org> | 2016-06-08 15:17:29 -0700 |
| commit | c89efd08b61b9aa245d843112fa908c8b9f5f8cb (patch) | |
| tree | fc9712d20032fa168474545b0757dfdd9855eaa0 | |
| parent | 848faf10c4ada78120ee70a0f7654638095cefa6 (diff) | |
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.
Change-Id: If7c91c31b490b0762d23df21db7c30652b0817d4
Signed-off-by: Maya Erez <qca_merez@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Git-commit: ab6d7cc3eab4093caf91ba8b27590c4080d7d01c
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git
CRs-Fixed: 1015627
Signed-off-by: Maya Erez <merez@codeaurora.org>
| -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; |