evie/android_kernel_oneplus_msm8998
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

wil6210: guarantee safe access to rx descriptors shared memory

Browse source 
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>
This commit is contained in:
Maya Erez 2016-05-29 08:44:09 +03:00 • committed by Kyle Yan
parent 848faf10c4
commit c89efd08b6
1 changed files with 6 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
drivers/net/wireless/ath/wil6210/txrx.c
View file

@ -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;