* [PATCH] serial: ma35d1: unmap MMIO on remove
@ 2026-09-24 11:04 Guangshuo Li
2026-10-01 8:41 ` Greg KH
0 siblings, 1 reply; 2+ messages in thread
From: Guangshuo Li @ 2026-09-24 11:04 UTC (permalink / raw)
To: ychuang3, schung, gregkh, jirislaby
Cc: linux-arm-kernel, linux-kernel, linux-serial, ilpo.jarvinen,
lgs201920130244
ma35d1serial_probe() maps up->port.membase with ioremap(), but
ma35d1serial_remove() does not perform the matching iounmap(). The probe
error path already releases this mapping after disabling the clock.
Add iounmap() to the remove path after clk_disable_unprepare() to match
the resource cleanup order used by ma35d1serial_probe().
Fixes: 930cbf92db01 ("tty: serial: Add Nuvoton ma35d1 serial driver support")
Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
---
drivers/tty/serial/ma35d1_serial.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/tty/serial/ma35d1_serial.c b/drivers/tty/serial/ma35d1_serial.c
index 920fe7ff5083..e5eaaf154911 100644
--- a/drivers/tty/serial/ma35d1_serial.c
+++ b/drivers/tty/serial/ma35d1_serial.c
@@ -770,6 +770,7 @@ static void ma35d1serial_remove(struct platform_device *dev)
uart_remove_one_port(&ma35d1serial_reg, port);
clk_disable_unprepare(up->clk);
+ iounmap(up->port.membase);
}
static int ma35d1serial_suspend(struct platform_device *dev, pm_message_t state)
base-commit: f03c39de3a1307371a4032757cd1732e91087c7d
--
2.43.0
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [PATCH] serial: ma35d1: unmap MMIO on remove
2026-09-24 11:04 [PATCH] serial: ma35d1: unmap MMIO on remove Guangshuo Li
@ 2026-10-01 8:41 ` Greg KH
0 siblings, 0 replies; 2+ messages in thread
From: Greg KH @ 2026-10-01 8:41 UTC (permalink / raw)
To: Guangshuo Li
Cc: ychuang3, schung, jirislaby, linux-arm-kernel, linux-kernel,
linux-serial, ilpo.jarvinen
On Thu, Sep 24, 2026 at 07:04:00PM +0800, Guangshuo Li wrote:
> ma35d1serial_probe() maps up->port.membase with ioremap(), but
> ma35d1serial_remove() does not perform the matching iounmap(). The probe
> error path already releases this mapping after disabling the clock.
>
> Add iounmap() to the remove path after clk_disable_unprepare() to match
> the resource cleanup order used by ma35d1serial_probe().
>
> Fixes: 930cbf92db01 ("tty: serial: Add Nuvoton ma35d1 serial driver support")
> Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
> ---
> drivers/tty/serial/ma35d1_serial.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/tty/serial/ma35d1_serial.c b/drivers/tty/serial/ma35d1_serial.c
> index 920fe7ff5083..e5eaaf154911 100644
> --- a/drivers/tty/serial/ma35d1_serial.c
> +++ b/drivers/tty/serial/ma35d1_serial.c
> @@ -770,6 +770,7 @@ static void ma35d1serial_remove(struct platform_device *dev)
>
> uart_remove_one_port(&ma35d1serial_reg, port);
> clk_disable_unprepare(up->clk);
> + iounmap(up->port.membase);
> }
>
> static int ma35d1serial_suspend(struct platform_device *dev, pm_message_t state)
>
> base-commit: f03c39de3a1307371a4032757cd1732e91087c7d
> --
> 2.43.0
>
Did you forget an Assisted-by: tag?
thanks,
greg k-h
^ permalink raw reply [flat|nested] 2+ messages in thread
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2026-09-24 11:04 [PATCH] serial: ma35d1: unmap MMIO on remove Guangshuo Li
2026-10-01 8:41 ` Greg KH
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