2010-09-16 11:38:27 +00:00
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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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2010-11-17 03:43:24 +00:00
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@@ -592,6 +592,10 @@ static void rt2800pci_kill_tx_queue(stru
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2010-09-16 11:38:27 +00:00
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return;
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}
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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, (queue->qid == QID_AC_BE));
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rt2x00_set_field32(®, WPDMA_RST_IDX_DTX_IDX1, (queue->qid == QID_AC_BK));
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