| | Date | Wed, 3 Dec 2008 11:50:37 -0800 | | From | Greg KH <> | | Subject | [patch 026/104] ath9k: correct expected max RX buffer size |
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2.6.27-stable review patch. If anyone has any objections, please let us know.
------------------ From: Luis R. Rodriguez <lrodriguez@atheros.com> commit b4b6cda2298b0c9a0af902312184b775b8867c65 upstream
We should only tell the hardware its capable of DMA'ing to us only what we asked dev_alloc_skb(). Prior to this it is possible a large RX'd frame could have corrupted DMA data but for us but we were saved only because we were previously also pci_map_single()'ing the same large value. The issue prior to this though was we were unmapping a smaller amount which the prior DMA patch fixed.
Signed-off-by: Bennyam Malavazi <Bennyam.Malavazi@atheros.com> Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- drivers/net/wireless/ath9k/recv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/net/wireless/ath9k/recv.c +++ b/drivers/net/wireless/ath9k/recv.c @@ -52,7 +52,7 @@ static void ath_rx_buf_link(struct ath_s /* setup rx descriptors */ ath9k_hw_setuprxdesc(ah, ds, - skb_tailroom(skb), /* buffer size */ + sc->sc_rxbufsize, 0); if (sc->sc_rxlink == NULL)
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