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authorHeiner Kallweit <hkallweit1@gmail.com>2024-03-04 21:31:06 +0100
committerWolfram Sang <wsa+renesas@sang-engineering.com>2024-03-08 10:10:26 +0100
commitceb013b2d9a2946035de5e1827624edc85ae9484 (patch)
tree3edba6b9f7555aea923edcec81299d5234ffa2ba /drivers
parent09f02902eb9cd41d4b88f4a5b93696297b57a3b0 (diff)
i2c: i801: Avoid potential double call to gpiod_remove_lookup_table
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@vger.kernel.org Reviewed-by: Andi Shyti <andi.shyti@kernel.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/i2c/busses/i2c-i801.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index 9a0a77383ca8..274e987e4cfa 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -1416,7 +1416,6 @@ static void i801_add_mux(struct i801_priv *priv)
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
@@ -1430,7 +1429,10 @@ static void i801_add_mux(struct i801_priv *priv)
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;
}
}