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sh,sh-sci: Use NO_POLL_CHAR in the SCIF polled console code

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The sci_poll_get_char() needs to return immediately if there is no
input from the chip to process, and must return a value of
NO_POLL_CHAR.

This allows kgdboc to process multiple polled devices while kgdb is
active.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Acked-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Jason Wessel 2010-05-20 21:04:23 -05:00
parent f5316b4aea
commit 3f255eb37e
1 changed files with 5 additions and 1 deletions
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6
drivers/serial/sh-sci.c
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@ -151,7 +151,11 @@ static int sci_poll_get_char(struct uart_port *port)
handle_error(port);
continue;
}
} while (!(status & SCxSR_RDxF(port)));
break;
} while (1);
if (!(status & SCxSR_RDxF(port)))
return NO_POLL_CHAR;
c = sci_in(port, SCxRDR);