This is a note to let you know that I've just added the patch titled
i2c: i801: Avoid potential double call to gpiod_remove_lookup_table
to the 6.6-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:
i2c-i801-avoid-potential-double-call-to-gpiod_remove_lookup_table.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ceb013b2d9a2946035de5e1827624edc85ae9484 Mon Sep 17 00:00:00 2001
From: Heiner Kallweit <hkallweit1@xxxxxxxxx>
Date: Mon, 4 Mar 2024 21:31:06 +0100
Subject: i2c: i801: Avoid potential double call to gpiod_remove_lookup_table
From: Heiner Kallweit <hkallweit1@xxxxxxxxx>
commit ceb013b2d9a2946035de5e1827624edc85ae9484 upstream.
If registering the platform device fails, the lookup table is
removed in the error path. On module removal we would try to
remove the lookup table again. Fix this by setting priv->lookup
only if registering the platform device was successful.
In addition free the memory allocated for the lookup table in
the error path.
Fixes: d308dfbf62ef ("i2c: mux/i801: Switch to use descriptor passing")
Cc: stable@xxxxxxxxxxxxxxx
Reviewed-by: Andi Shyti <andi.shyti@xxxxxxxxxx>
Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Heiner Kallweit <hkallweit1@xxxxxxxxx>
Signed-off-by: Andi Shyti <andi.shyti@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/i2c/busses/i2c-i801.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -1417,7 +1417,6 @@ static void i801_add_mux(struct i801_pri
lookup->table[i] = GPIO_LOOKUP(mux_config->gpio_chip,
mux_config->gpios[i], "mux", 0);
gpiod_add_lookup_table(lookup);
- priv->lookup = lookup;
/*
* Register the mux device, we use PLATFORM_DEVID_NONE here
@@ -1431,7 +1430,10 @@ static void i801_add_mux(struct i801_pri
sizeof(struct i2c_mux_gpio_platform_data));
if (IS_ERR(priv->mux_pdev)) {
gpiod_remove_lookup_table(lookup);
+ devm_kfree(dev, lookup);
dev_err(dev, "Failed to register i2c-mux-gpio device\n");
+ } else {
+ priv->lookup = lookup;
}
}
Patches currently in stable-queue which might be from hkallweit1@xxxxxxxxx are
queue-6.6/i2c-i801-avoid-potential-double-call-to-gpiod_remove_lookup_table.patch
