diff options
| author |   Michael Büsch <m@bues.ch> | 2011-07-04 19:51:11 +0200 |
|---|---|---|
| committer |   John W. Linville <linville@tuxdriver.com> | 2011-07-05 15:26:59 -0400 |
| commit | 73e6cdcf479ce3a8d33a726f0477473db35a4b2e (patch) | |
| tree | c44422c46263f774cbc5f3d211df309ecddb590f /drivers/net/wireless/b43/dma.c | |
| parent | NFC: add Documentation/networking/nfc.txt (diff) | |
| download | linux-dev-73e6cdcf479ce3a8d33a726f0477473db35a4b2e.tar.xz linux-dev-73e6cdcf479ce3a8d33a726f0477473db35a4b2e.zip | |
b43: Add RX side DMA memory barrier
This adds a memory barrier to ensure the writes to the ring memory
are committed before the DMA ring pointer is updated.
We do a similar thing on the TX side already.
Signed-off-by: Michael Buesch <m@bues.ch>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/b43/dma.c')
| -rw-r--r-- | drivers/net/wireless/b43/dma.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/wireless/b43/dma.c b/drivers/net/wireless/b43/dma.c index d02cf8300e3e..7a09a467339c 100644 --- a/drivers/net/wireless/b43/dma.c +++ b/drivers/net/wireless/b43/dma.c @@ -1600,6 +1600,7 @@ void b43_dma_rx(struct b43_dmaring *ring) dma_rx(ring, &slot); update_max_used_slots(ring, ++used_slots); } + wmb(); ops->set_current_rxslot(ring, slot); ring->current_slot = slot; } |