Title: [7163] trunk/drivers/serial/bfin_5xx.c: Bug [#5423], uart transmitter interrupted the dma timeout function and deadlocked on the spin_lock
- Revision
- 7163
- Author
- gyang
- Date
- 2009-08-11 23:32:15 -0400 (Tue, 11 Aug 2009)
Log Message
Bug [#5423], uart transmitter interrupted the dma timeout function and deadlocked on the spin_lock
Modified Paths
Diff
Modified: trunk/drivers/serial/bfin_5xx.c (7162 => 7163)
--- trunk/drivers/serial/bfin_5xx.c 2009-08-12 03:31:58 UTC (rev 7162)
+++ trunk/drivers/serial/bfin_5xx.c 2009-08-12 03:32:15 UTC (rev 7163)
@@ -484,6 +484,7 @@
{
int x_pos, pos;
+ dma_disable_irq(uart->tx_dma_channel);
dma_disable_irq(uart->rx_dma_channel);
spin_lock_bh(&uart->port.lock);
@@ -517,6 +518,7 @@
}
spin_unlock_bh(&uart->port.lock);
+ dma_enable_irq(uart->tx_dma_channel);
dma_enable_irq(uart->rx_dma_channel);
mod_timer(&(uart->rx_dma_timer), jiffies + DMA_RX_FLUSH_JIFFIES);
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