This is a note to let you know that I've just added the patch titled
serial: stm32: avoid kernel warning on absence of optional IRQ
to my tty git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git in the tty-linus branch.
The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)
The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.
If you have any questions about this process, please let me know.
From fdf16d78941b4f380753053d229955baddd00712 Mon Sep 17 00:00:00 2001
From: Holger Assmann h.assmann@pengutronix.de Date: Thu, 13 Aug 2020 17:27:57 +0200 Subject: 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 --- drivers/tty/serial/stm32-usart.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
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; }