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serial: sh-sci: Handle request_irq() failures.

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request_irq() can fail, so actually do something with the error path
instead of blindly ignoring it.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2011-01-19 17:30:53 +09:00
parent d535a2305f
commit 073e84c932
1 changed files with 8 additions and 1 deletions
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9
drivers/serial/sh-sci.c
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@ -830,6 +830,7 @@ static int sci_notifier(struct notifier_block *self,
if ((phase == CPUFREQ_POSTCHANGE) ||
(phase == CPUFREQ_RESUMECHANGE)) {
struct uart_port *port = &sci_port->port;
spin_lock_irqsave(&port->lock, flags);
port->uartclk = clk_get_rate(sci_port->iclk);
spin_unlock_irqrestore(&port->lock, flags);
@ -1428,14 +1429,19 @@ static inline void sci_free_dma(struct uart_port *port)
static int sci_startup(struct uart_port *port)
{
struct sci_port *s = to_sci_port(port);
int ret;
dev_dbg(port->dev, "%s(%d)\n", __func__, port->line);
if (s->enable)
s->enable(port);
sci_request_irq(s);
ret = sci_request_irq(s);
if (unlikely(ret < 0))
return ret;
sci_request_dma(port);
sci_start_tx(port);
sci_start_rx(port);
@ -1450,6 +1456,7 @@ static void sci_shutdown(struct uart_port *port)
sci_stop_rx(port);
sci_stop_tx(port);
sci_free_dma(port);
sci_free_irq(s);