| 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 resetting 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 | --- a/drivers/net/wireless/rt2x00/rt2800pci.c |
| 18 | +++ b/drivers/net/wireless/rt2x00/rt2800pci.c |
| 19 | @@ -593,6 +593,10 @@ static void rt2800pci_kill_tx_queue(stru |
| 20 | return; |
| 21 | } |
| 22 | |
| 23 | + rt2800_register_read(rt2x00dev, WPDMA_GLO_CFG, ®); |
| 24 | + rt2x00_set_field32(®, WPDMA_GLO_CFG_ENABLE_TX_DMA, 0); |
| 25 | + rt2800_register_write(rt2x00dev, WPDMA_GLO_CFG, reg); |
| 26 | + |
| 27 | rt2800_register_read(rt2x00dev, WPDMA_RST_IDX, ®); |
| 28 | rt2x00_set_field32(®, WPDMA_RST_IDX_DTX_IDX0, (queue->qid == QID_AC_BE)); |
| 29 | rt2x00_set_field32(®, WPDMA_RST_IDX_DTX_IDX1, (queue->qid == QID_AC_BK)); |
| 30 | |
