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powerpc/mpc5200: fix error paths in PSC UART probe function

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- error cases for mapbase and irq were unbundled
- mapped irq now gets disposed on error

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Wolfram Sang 2008-12-21 02:54:32 -07:00 committed by Grant Likely
parent aec739e010
commit 418441d9eb
1 changed files with 15 additions and 8 deletions
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23
drivers/serial/mpc52xx_uart.c
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@ -1148,22 +1148,29 @@ mpc52xx_uart_of_probe(struct of_device *op, const struct of_device_id *match)
return ret;
port->mapbase = res.start;
if (!port->mapbase) {
dev_dbg(&op->dev, "Could not allocate resources for PSC\n");
return -EINVAL;
}
port->irq = irq_of_parse_and_map(op->node, 0);
if (port->irq == NO_IRQ) {
dev_dbg(&op->dev, "Could not get irq\n");
return -EINVAL;
}
dev_dbg(&op->dev, "mpc52xx-psc uart at %p, irq=%x, freq=%i\n",
(void *)port->mapbase, port->irq, port->uartclk);
if ((port->irq == NO_IRQ) || !port->mapbase) {
printk(KERN_ERR "Could not allocate resources for PSC\n");
return -EINVAL;
}
/* Add the port to the uart sub-system */
ret = uart_add_one_port(&mpc52xx_uart_driver, port);
if (!ret)
dev_set_drvdata(&op->dev, (void *)port);
if (ret) {
irq_dispose_mapping(port->irq);
return ret;
}
return ret;
dev_set_drvdata(&op->dev, (void *)port);
return 0;
}
static int