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serial: 8250_em: Switch to use platform_get_irq()

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platform_get_irq() provides an established error code and error message.
Also, it's better to use dedicated API to retrieve Linux IRQ resource.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200618095144.73852-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko 2020-06-18 12:51:44 +03:00 committed by Greg Kroah-Hartman
parent 5b36146eac
commit 2a1dbd259e
1 changed files with 10 additions and 6 deletions
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16
drivers/tty/serial/8250/8250_em.c
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@ -78,14 +78,18 @@ static void serial8250_em_serial_dl_write(struct uart_8250_port *up, int value)
static int serial8250_em_probe(struct platform_device *pdev)
{
struct resource *regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
struct resource *irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
struct serial8250_em_priv *priv;
struct uart_8250_port up;
int ret;
struct resource *regs;
int irq, ret;
if (!regs || !irq) {
dev_err(&pdev->dev, "missing registers or irq\n");
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!regs) {
dev_err(&pdev->dev, "missing registers\n");
return -EINVAL;
}
@ -101,7 +105,7 @@ static int serial8250_em_probe(struct platform_device *pdev)
memset(&up, 0, sizeof(up));
up.port.mapbase = regs->start;
up.port.irq = irq->start;
up.port.irq = irq;
up.port.type = PORT_UNKNOWN;
up.port.flags = UPF_BOOT_AUTOCONF | UPF_FIXED_PORT | UPF_IOREMAP;
up.port.dev = &pdev->dev;