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29 lines
1.2 KiB
29 lines
1.2 KiB
From 27ed5ec6924c17b76d65b697a162bafee7bd8e4e Mon Sep 17 00:00:00 2001
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From: Helmut Schaa <helmut.schaa@googlemail.com>
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Date: Mon, 21 Jun 2010 10:03:05 +0200
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Subject: [PATCH] rt2x00: fix rt2800pci hang on ifdown
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rt2800pci hangs the system on rt305x SoC devices on ifdown. Work around
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this issue by disabling TX DMA prior to resetting the TX queue indices.
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This patch is not suitable for upstream inclusion but is just meant as
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a workaround until a proper solution is implemented.
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Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
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---
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drivers/net/wireless/rt2x00/rt2800pci.c | 4 ++++
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1 files changed, 4 insertions(+), 0 deletions(-)
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--- a/drivers/net/wireless/rt2x00/rt2800pci.c
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+++ b/drivers/net/wireless/rt2x00/rt2800pci.c
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@@ -481,6 +481,10 @@ static void rt2800pci_disable_radio(stru
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rt2800_register_write(rt2x00dev, PBF_SYS_CTRL, 0x00001280);
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+ rt2800_register_read(rt2x00dev, WPDMA_GLO_CFG, ®);
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+ rt2x00_set_field32(®, WPDMA_GLO_CFG_ENABLE_TX_DMA, 0);
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+ rt2800_register_write(rt2x00dev, WPDMA_GLO_CFG, reg);
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+
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rt2800_register_read(rt2x00dev, WPDMA_RST_IDX, ®);
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rt2x00_set_field32(®, WPDMA_RST_IDX_DTX_IDX0, 1);
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rt2x00_set_field32(®, WPDMA_RST_IDX_DTX_IDX1, 1);
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