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| author |   Holger Assmann <h.assmann@pengutronix.de> | 2020-08-13 17:27:57 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-08-18 13:32:28 +0200 |
| commit | fdf16d78941b4f380753053d229955baddd00712 (patch) | |
| tree | 1817a0765c6a4f849d933982fbc6ee48c587b17e /drivers/tty | |
| parent | serial: pl011: Fix oops on -EPROBE_DEFER (diff) | |
| download | wireguard-linux-fdf16d78941b4f380753053d229955baddd00712.tar.xz wireguard-linux-fdf16d78941b4f380753053d229955baddd00712.zip | |
serial: stm32: avoid kernel warning on absence of optional IRQ
stm32_init_port() of the stm32-usart may trigger a warning in
platform_get_irq() when the device tree specifies no wakeup interrupt.
The wakeup interrupt is usually a board-specific GPIO and the driver
functions correctly in its absence. The mainline stm32mp151.dtsi does
not specify it, so all mainline device trees trigger an unnecessary
kernel warning. Use of platform_get_irq_optional() avoids this.
Fixes: 2c58e56096dd ("serial: stm32: fix the get_irq error case")
Signed-off-by: Holger Assmann <h.assmann@pengutronix.de>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200813152757.32751-1-h.assmann@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/stm32-usart.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c index 143300a80090..ba503dd04ce2 100644 --- a/drivers/tty/serial/stm32-usart.c +++ b/drivers/tty/serial/stm32-usart.c @@ -970,7 +970,7 @@ static int stm32_init_port(struct stm32_port *stm32port, return ret; if (stm32port->info->cfg.has_wakeup) { - stm32port->wakeirq = platform_get_irq(pdev, 1); + stm32port->wakeirq = platform_get_irq_optional(pdev, 1); if (stm32port->wakeirq <= 0 && stm32port->wakeirq != -ENXIO) return stm32port->wakeirq ? : -ENODEV; } |