Messages in this thread | | | Date | Sat, 23 Oct 2004 09:39:38 -0200 | From | Marcelo Tosatti <> | Subject | Re: Linux 2.4.28-rc1 |
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On Sat, Oct 23, 2004 at 08:30:20AM -0500, Paul Fulghum wrote: > On Fri, 2004-10-22 at 13:59, Marcelo Tosatti wrote: > > Here goes the first release candidate of v2.4.28. > > Any chance of getting this in?
Oh I missed that, sorry (I've seen it and thought I had applied).
Well, there it is.
> > -- > Paul Fulghum > paulkf@microgate.com > > >From paulkf@microgate.com Fri Oct 8 13:20:56 2004 > Subject: [PATCH] serial receive lockup fix > From: Paul Fulghum <paulkf@microgate.com> > To: Marcelo Tosatti <marcelo.tosatti@cyclades.com> > Cc: linux-kernel <linux-kernel@vger.kernel.org> > > Fix lockup caused by serial driver not clearing > receive interrupt if flip buffer becomes full. > > Signed-off-by: Paul Fulghum <paulkf@microgate.com> > > > > --- a/drivers/char/serial.c 2004-09-29 09:08:35.000000000 -0500 > +++ b/drivers/char/serial.c 2004-09-29 09:09:07.000000000 -0500 > @@ -573,8 +573,19 @@ > do { > if (tty->flip.count >= TTY_FLIPBUF_SIZE) { > tty->flip.tqueue.routine((void *) tty); > - if (tty->flip.count >= TTY_FLIPBUF_SIZE) > + if (tty->flip.count >= TTY_FLIPBUF_SIZE) { > + /* no room in flip buffer, discard rx FIFO contents to clear IRQ > + * *FIXME* Hardware with auto flow control > + * would benefit from leaving the data in the FIFO and > + * disabling the rx IRQ until space becomes available. > + */ > + do { > + serial_inp(info, UART_RX); > + icount->overrun++; > + *status = serial_inp(info, UART_LSR); > + } while ((*status & UART_LSR_DR) && (max_count-- > 0)); > return; // if TTY_DONT_FLIP is set > + } > } > ch = serial_inp(info, UART_RX); > *tty->flip.char_buf_ptr = ch; > > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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