diff options
| author | Jiri Slaby <jslaby@suse.cz> | 2016-05-09 10:23:35 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-06-25 19:01:52 +0300 |
| commit | 394a9e2ca2b6326c939c90453184cbc65542cfa1 (patch) | |
| tree | b902eedfcac6d7d37b514fae68264afdd8509e33 /drivers/tty/serial/fsl_lpuart.c | |
| parent | 934014d5220616dc6ea62da6685b79855b164643 (diff) | |
| download | linux-394a9e2ca2b6326c939c90453184cbc65542cfa1.tar.xz | |
TTY: serial, handle platform_get_irq retval properly
platform_get_irq can fail, so we should handle negative value when
returned.
[v2]
platform_get_irq can actually return zero on some platforms. So do not
remove checks for irq == 0 there.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: "Uwe Kleine-König" <kernel@pengutronix.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Laxman Dewangan <ldewangan@nvidia.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Alexandre Courbot <gnurou@gmail.com>
Cc: linux-serial@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-tegra@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/fsl_lpuart.c')
| -rw-r--r-- | drivers/tty/serial/fsl_lpuart.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 3d790033744e..7f95f782a485 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -1830,7 +1830,13 @@ static int lpuart_probe(struct platform_device *pdev) sport->port.dev = &pdev->dev; sport->port.type = PORT_LPUART; sport->port.iotype = UPIO_MEM; - sport->port.irq = platform_get_irq(pdev, 0); + ret = platform_get_irq(pdev, 0); + if (ret < 0) { + dev_err(&pdev->dev, "cannot obtain irq\n"); + return ret; + } + sport->port.irq = ret; + if (sport->lpuart32) sport->port.ops = &lpuart32_pops; else |