This is a note to let you know that I've just added the patch titled
serial: 8250_of: fix return code when probe function fails to get reset
to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
serial-8250_of-fix-return-code-when-probe-function-fails-to-get-reset.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From b9820a31691b771db37afe2054dd3d3a680c1eed Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
Date: Wed, 27 Dec 2017 14:21:05 +0900
Subject: serial: 8250_of: fix return code when probe function fails to get reset
From: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
commit b9820a31691b771db37afe2054dd3d3a680c1eed upstream.
The error pointer from devm_reset_control_get_optional_shared() is
not propagated.
One of the most common problem scenarios is it returns -EPROBE_DEFER
when the reset controller has not probed yet. In this case, the
probe of the reset consumer should be deferred.
Fixes: e2860e1f62f2 ("serial: 8250_of: Add reset support")
Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
Reviewed-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/tty/serial/8250/8250_of.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/tty/serial/8250/8250_of.c
+++ b/drivers/tty/serial/8250/8250_of.c
@@ -141,8 +141,11 @@ static int of_platform_serial_setup(stru
}
info->rst = devm_reset_control_get_optional_shared(&ofdev->dev, NULL);
- if (IS_ERR(info->rst))
+ if (IS_ERR(info->rst)) {
+ ret = PTR_ERR(info->rst);
goto err_dispose;
+ }
+
ret = reset_control_deassert(info->rst);
if (ret)
goto err_dispose;
Patches currently in stable-queue which might be from yamada.masahiro@xxxxxxxxxxxxx are
queue-4.14/serial-8250_of-fix-return-code-when-probe-function-fails-to-get-reset.patch
queue-4.14/mtd-nand-denali_pci-add-missing-module_description-author-license.patch
queue-4.14/serial-8250_uniphier-fix-error-return-code-in-uniphier_uart_probe.patch