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Disable the TX ready interrupts once we received one, some UART won't clear

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the IIR_TXRDY bit upon reading.

Reviewed by:	marcel
This commit is contained in:
Olivier Houchard 2011-11-02 20:45:44 +00:00
parent 1a9879c32a
commit 11e55f9108
1 changed files with 5 additions and 2 deletions
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7
sys/dev/uart/uart_dev_ns8250.c
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@ -582,9 +582,11 @@ static int
ns8250_bus_ipend(struct uart_softc *sc)
{
struct uart_bas *bas;
struct ns8250_softc *ns8250;
int ipend;
uint8_t iir, lsr;
ns8250 = (struct ns8250_softc *)sc;
bas = &sc->sc_bas;
uart_lock(sc->sc_hwmtx);
iir = uart_getreg(bas, REG_IIR);
@ -602,9 +604,10 @@ ns8250_bus_ipend(struct uart_softc *sc)
if (lsr & LSR_RXRDY)
ipend |= SER_INT_RXREADY;
} else {
if (iir & IIR_TXRDY)
if (iir & IIR_TXRDY) {
ipend |= SER_INT_TXIDLE;
else
uart_setreg(bas, REG_IER, ns8250->ier);
} else
ipend |= SER_INT_SIGCHG;
}
if (ipend == 0)