Revert double IIR test in 8250 driver
Acked-by: Jaswinder Singh <[EMAIL PROTECTED]>
---
--- linux-2.6/drivers/serial/8250.c
+++ linux-2.6-vanilla/drivers/serial/8250.c
@@ -1867,7 +1867,6 @@
}
if (is_real_interrupt(up->port.irq)) {
- unsigned char iir1;
/*
* Test for UARTs that do not reassert THRE when the
* transmitter is idle and the interrupt has already
@@ -1881,7 +1880,7 @@
wait_for_xmitr(up, UART_LSR_THRE);
serial_out_sync(up, UART_IER, UART_IER_THRI);
udelay(1); /* allow THRE to set */
- iir1 = serial_in(up, UART_IIR);
+ serial_in(up, UART_IIR);
serial_out(up, UART_IER, 0);
serial_out_sync(up, UART_IER, UART_IER_THRI);
udelay(1); /* allow a working UART time to re-assert THRE */
@@ -1894,7 +1893,7 @@
* If the interrupt is not reasserted, setup a timer to
* kick the UART on a regular basis.
*/
- if (!(iir1 & UART_IIR_NO_INT) && (iir & UART_IIR_NO_INT)) {
+ if (iir & UART_IIR_NO_INT) {
pr_debug("ttyS%d - using backup timer\n", port->line);
up->timer.function = serial8250_backup_timeout;
up->timer.data = (unsigned long)up;
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