package/mac80211/patches/601-rt2x00-fix-hang-on-ifdown.patch

   1 From 27ed5ec6924c17b76d65b697a162bafee7bd8e4e Mon Sep 17 00:00:00 2001
   2 From: Helmut Schaa <helmut.schaa@googlemail.com>
   3 Date: Mon, 21 Jun 2010 10:03:05 +0200
   4 Subject: [PATCH] rt2x00: fix rt2800pci hang on ifdown
   5
   6 rt2800pci hangs the system on rt305x SoC devices on ifdown. Work around
   7 this issue by disabling TX DMA prior to restting the TX queue indices.
   8
   9 This patch is not suitable for upstream inclusion but is just meant as
  10 a workaround until a proper solution is implemented.
  11
  12 Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
  13 ---
  14  drivers/net/wireless/rt2x00/rt2800pci.c |    4 ++++
  15  1 files changed, 4 insertions(+), 0 deletions(-)
  16
  17 diff --git a/drivers/net/wireless/rt2x00/rt2800pci.c b/drivers/net/wireless/rt2x00/rt2800pci.c
  18 index 165da7b..bb35350 100644
  19 --- a/drivers/net/wireless/rt2x00/rt2800pci.c
  20 +++ b/drivers/net/wireless/rt2x00/rt2800pci.c
  21 @@ -737,6 +737,10 @@ static void rt2800pci_kill_tx_queue(struct rt2x00_dev *rt2x00dev,
  22                 rt2800_register_write(rt2x00dev, BCN_TIME_CFG, 0);
  23                 return;
  24         }
  25 +
  26 +       rt2800_register_read(rt2x00dev, WPDMA_GLO_CFG, &reg);
  27 +       rt2x00_set_field32(&reg, WPDMA_GLO_CFG_ENABLE_TX_DMA, 0);
  28 +       rt2800_register_write(rt2x00dev, WPDMA_GLO_CFG, reg);
  29
  30         rt2800_register_read(rt2x00dev, WPDMA_RST_IDX, &reg);
  31         rt2x00_set_field32(&reg, WPDMA_RST_IDX_DTX_IDX0, (qid == QID_AC_BE));
  32 --
  33 1.6.4.2
  34