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serial: sh-sci: Fix fifo stall on SH7760/SH7780/SH7785 SCIF.

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There was an off-by-1 in the SCRFDR calculation that caused writes over
128-bytes to hang in the FIFO. Fix it up.

Signed-off-by: Yutaro Ebihara <ebiharaml@si-linux.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Yutaro Ebihara 2008-03-11 13:58:50 +09:00 • committed by Paul Mundt
parent 2f44bbb495
commit cae167d3d7
1 changed files with 2 additions and 2 deletions
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4
drivers/serial/sh-sci.c
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@ -414,12 +414,12 @@ static void sci_init_pins_scif(struct uart_port *port, unsigned int cflag)
defined(CONFIG_CPU_SUBTYPE_SH7785) defined(CONFIG_CPU_SUBTYPE_SH7785)
static inline int scif_txroom(struct uart_port *port) static inline int scif_txroom(struct uart_port *port)
{ {
return SCIF_TXROOM_MAX - (sci_in(port, SCTFDR) & 0x7f); return SCIF_TXROOM_MAX - (sci_in(port, SCTFDR) & 0xff);
} }
static inline int scif_rxroom(struct uart_port *port) static inline int scif_rxroom(struct uart_port *port)
{ {
return sci_in(port, SCRFDR) & 0x7f; return sci_in(port, SCRFDR) & 0xff;
} }
#else #else
static inline int scif_txroom(struct uart_port *port) static inline int scif_txroom(struct uart_port *port)