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rk_serial:1.fix bug dma buffer free error

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hhb
2013-04-16 17:10:09 +08:00
parent addc93ff1f
commit 3fbf432a9f
1 changed files with 5 additions and 3 deletions
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8
drivers/tty/serial/rk_serial.c
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@@ -64,8 +64,10 @@
*v1.3 : 2012-12-14
* 1. When enable Programmable THRE Interrupt Mode, in lsr register, only UART_LSR_TEMT means transmit empty, but
UART_LSR_THRE doesn't. So, the macro BOTH_EMPTY should be replaced with UART_LSR_TEMT.
*v1.4 : 2013-04-16
* 1.fix bug dma buffer free error
*/
#define VERSION_AND_TIME "rk_serial.c v1.3 2012-12-14"
#define VERSION_AND_TIME "rk_serial.c v1.4 2013-04-16"
#define PORT_RK 90
#define UART_USR 0x1F /* UART Status Register */
@@ -1349,8 +1351,8 @@ static void serial_rk_shutdown(struct uart_port *port)
*/
(void) serial_in(up, UART_RX);
#if USE_DMA
//if (up->dma->use_dma & TX_DMA)
// up->port.state->xmit.buf = NULL;
if (up->dma->use_dma & TX_DMA)
up->port.state->xmit.buf = NULL;
#endif
free_irq(up->port.irq, up);
clk_disable(up->clk);