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 <jsl...@suse.cz>
Cc: Russell King <li...@arm.linux.org.uk>
Cc: "Uwe Kleine-König" <ker...@pengutronix.de>
Cc: Russell King <li...@armlinux.org.uk>
Cc: Benjamin Herrenschmidt <b...@kernel.crashing.org>
Cc: Paul Mackerras <pau...@samba.org>
Cc: Michael Ellerman <m...@ellerman.id.au>
Cc: Laxman Dewangan <ldewan...@nvidia.com>
Cc: Stephen Warren <swar...@wwwdotorg.org>
Cc: Thierry Reding <thierry.red...@gmail.com>
Cc: Alexandre Courbot <gnu...@gmail.com>
Cc: linux-ser...@vger.kernel.org
Cc: linux-ker...@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-te...@vger.kernel.org
---
drivers/tty/serial/amba-pl011.c | 8 +++++++-
drivers/tty/serial/fsl_lpuart.c | 8 +++++++-
drivers/tty/serial/pmac_zilog.c | 2 +-
drivers/tty/serial/serial-tegra.c | 7 ++++++-
4 files changed, 21 insertions(+), 4 deletions(-)
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index a2aa655f56c4..c70bb41800f1 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -2553,11 +2553,17 @@ static int sbsa_uart_probe(struct platform_device *pdev)
if (!uap)
return -ENOMEM;
+ ret = platform_get_irq(pdev, 0);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "cannot obtain irq\n");
+ return ret;
+ }
+ uap->port.irq = ret;
+
uap->reg_offset = vendor_sbsa.reg_offset;
uap->vendor = &vendor_sbsa;
uap->fifosize = 32;
uap->port.iotype = vendor_sbsa.access_32b ? UPIO_MEM32 : UPIO_MEM;
- uap->port.irq = platform_get_irq(pdev, 0);
uap->port.ops = &sbsa_uart_pops;
uap->fixed_baud = baudrate;
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
diff --git a/drivers/tty/serial/pmac_zilog.c b/drivers/tty/serial/pmac_zilog.c
index e156e39d620c..b24b0556f5a8 100644
--- a/drivers/tty/serial/pmac_zilog.c
+++ b/drivers/tty/serial/pmac_zilog.c
@@ -1720,7 +1720,7 @@ static int __init pmz_init_port(struct uart_pmac_port
*uap)
r_ports = platform_get_resource(uap->pdev, IORESOURCE_MEM, 0);
irq = platform_get_irq(uap->pdev, 0);
- if (!r_ports || !irq)
+ if (!r_ports || irq <= 0)
return -ENODEV;
uap->port.mapbase = r_ports->start;
diff --git a/drivers/tty/serial/serial-tegra.c
b/drivers/tty/serial/serial-tegra.c
index bee1e5867426..4c4674b51db9 100644
--- a/drivers/tty/serial/serial-tegra.c
+++ b/drivers/tty/serial/serial-tegra.c
@@ -1310,7 +1310,12 @@ static int tegra_uart_probe(struct platform_device *pdev)
}
u->iotype = UPIO_MEM32;
- u->irq = platform_get_irq(pdev, 0);
+ ret = platform_get_irq(pdev, 0);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Couldn't get IRQ\n");
+ return ret;
+ }
+ u->irq = ret;
u->regshift = 2;
ret = uart_add_one_port(&tegra_uart_driver, u);
if (ret < 0) {
--
2.8.2
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