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pch_uart: Fix return value issue 

Currently, occurring line status interrupt,
returned value is not set in interrupt handler function.
As a result, 0 can be returned.

This patch adds setting returned value.

Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomoya MORINAGA 2012-03-26 14:43:05 +09:00 committed by Greg Kroah-Hartman
parent 159d4e1e73
commit 04e2c2e3bf
1 changed files with 5 additions and 0 deletions
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5
drivers/tty/serial/pch_uart.c
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@ -39,6 +39,7 @@ enum {
PCH_UART_HANDLED_RX_ERR_INT_SHIFT,
PCH_UART_HANDLED_RX_TRG_INT_SHIFT,
PCH_UART_HANDLED_MS_INT_SHIFT,
PCH_UART_HANDLED_LS_INT_SHIFT,
};
enum {
@ -63,6 +64,8 @@ enum {
PCH_UART_HANDLED_RX_TRG_INT_SHIFT)<<1))
#define PCH_UART_HANDLED_MS_INT (1<<((PCH_UART_HANDLED_MS_INT_SHIFT)<<1))
#define PCH_UART_HANDLED_LS_INT (1<<((PCH_UART_HANDLED_LS_INT_SHIFT)<<1))
#define PCH_UART_RBR 0x00
#define PCH_UART_THR 0x00
@ -1058,6 +1061,8 @@ static irqreturn_t pch_uart_interrupt(int irq, void *dev_id)
UART_LSR_PE | UART_LSR_OE)) {
pch_uart_err_ir(priv, lsr);
ret = PCH_UART_HANDLED_RX_ERR_INT;
} else {
ret = PCH_UART_HANDLED_LS_INT;
}
break;
case PCH_UART_IID_RDR: /* Received Data Ready */