Subject: [PATCH] rt2x00: fix rt2800pci hang on ifdown
rt2800pci hangs the system on rt305x SoC devices on ifdown. Work around
-this issue by disabling TX DMA prior to restting the TX queue indices.
+this issue by disabling TX DMA prior to resetting the TX queue indices.
This patch is not suitable for upstream inclusion but is just meant as
a workaround until a proper solution is implemented.
--- a/drivers/net/wireless/rt2x00/rt2800pci.c
+++ b/drivers/net/wireless/rt2x00/rt2800pci.c
-@@ -749,6 +749,10 @@ static void rt2800pci_kill_tx_queue(stru
- rt2800_register_write(rt2x00dev, BCN_TIME_CFG, 0);
+@@ -593,6 +593,10 @@ static void rt2800pci_kill_tx_queue(stru
return;
}
-+
+
+ rt2800_register_read(rt2x00dev, WPDMA_GLO_CFG, ®);
+ rt2x00_set_field32(®, WPDMA_GLO_CFG_ENABLE_TX_DMA, 0);
+ rt2800_register_write(rt2x00dev, WPDMA_GLO_CFG, reg);
-
++
rt2800_register_read(rt2x00dev, WPDMA_RST_IDX, ®);
- rt2x00_set_field32(®, WPDMA_RST_IDX_DTX_IDX0, (qid == QID_AC_BE));
+ rt2x00_set_field32(®, WPDMA_RST_IDX_DTX_IDX0, (queue->qid == QID_AC_BE));
+ rt2x00_set_field32(®, WPDMA_RST_IDX_DTX_IDX1, (queue->qid == QID_AC_BK));