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Commit 7ed43f6a authored by Graf Yang's avatar Graf Yang Committed by Greg Kroah-Hartman
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serial: bfin_5xx: need to disable DMA TX interrupt too 



If we don't disable the DMA TX channel, an inopportune timeout will
trigger the interrupt handler and may cause a dead lock with the spin_lock.

Signed-off-by: default avatarGraf Yang <graf.yang@analog.com>
Signed-off-by: default avatarMike Frysinger <vapier@gentoo.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent b2ced4f6

drivers/serial/bfin_5xx.c

+2 −0
Original line number Diff line number Diff line
@@ -488,6 +488,7 @@ void bfin_serial_rx_dma_timeout(struct bfin_serial_port *uart) 
{

	int x_pos, pos;



	dma_disable_irq(uart->tx_dma_channel);

	dma_disable_irq(uart->rx_dma_channel);

	spin_lock_bh(&uart->port.lock);
@@ -521,6 +522,7 @@ void bfin_serial_rx_dma_timeout(struct bfin_serial_port *uart) 
	}



	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);