This is a note to let you know that I've just added the patch titled
serial: samsung: Removes the IRQ not found warning
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 8c6c378b0cbe0c9f1390986b5f8ffb5f6ff7593b Mon Sep 17 00:00:00 2001
From: Tamseel Shams m.shams@samsung.com Date: Mon, 10 Aug 2020 08:30:21 +0530 Subject: serial: samsung: Removes the IRQ not found warning
In few older Samsung SoCs like s3c2410, s3c2412 and s3c2440, UART IP is having 2 interrupt lines. However, in other SoCs like s3c6400, s5pv210, exynos5433, and exynos4210 UART is having only 1 interrupt line. Due to this, "platform_get_irq(platdev, 1)" call in the driver gives the following false-positive error: "IRQ index 1 not found" on newer SoC's.
This patch adds the condition to check for Tx interrupt only for the those SoC's which have 2 interrupt lines.
Tested-by: Alim Akhtar alim.akhtar@samsung.com Tested-by: Marek Szyprowski m.szyprowski@samsung.com Reviewed-by: Krzysztof Kozlowski krzk@kernel.org Reviewed-by: Alim Akhtar alim.akhtar@samsung.com Signed-off-by: Tamseel Shams m.shams@samsung.com Cc: stable stable@vger.kernel.org Link: https://lore.kernel.org/r/20200810030021.45348-1-m.shams@samsung.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/tty/serial/samsung_tty.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c index 8ed3482d2e1e..8ae3e03fbd8c 100644 --- a/drivers/tty/serial/samsung_tty.c +++ b/drivers/tty/serial/samsung_tty.c @@ -1905,9 +1905,11 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport, ourport->tx_irq = ret + 1; }
- ret = platform_get_irq(platdev, 1); - if (ret > 0) - ourport->tx_irq = ret; + if (!s3c24xx_serial_has_interrupt_mask(port)) { + ret = platform_get_irq(platdev, 1); + if (ret > 0) + ourport->tx_irq = ret; + } /* * DMA is currently supported only on DT platforms, if DMA properties * are specified.