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gpio: ljca: Initialize num before accessing item in ljca_gpio_config

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With the new __counted_by annocation in ljca_gpio_packet, the "num"
struct member must be set before accessing the "item" array. Failing to
do so will trigger a runtime warning when enabling CONFIG_UBSAN_BOUNDS
and CONFIG_FORTIFY_SOURCE.

Fixes: 1034cc423f ("gpio: update Intel LJCA USB GPIO driver")
Cc: stable@vger.kernel.org
Signed-off-by: Haoyu Li <lihaoyu499@gmail.com>
Link: https://lore.kernel.org/stable/20241203141451.342316-1-lihaoyu499%40gmail.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
This commit is contained in:
Haoyu Li 2024-12-03 22:14:51 +08:00 committed by Bartosz Golaszewski
parent 70327137eb
commit 3396995f9f
1 changed files with 1 additions and 1 deletions
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2
drivers/gpio/gpio-ljca.c
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@ -82,9 +82,9 @@ static int ljca_gpio_config(struct ljca_gpio_dev *ljca_gpio, u8 gpio_id,
int ret;
mutex_lock(&ljca_gpio->trans_lock);
packet->num = 1;
packet->item[0].index = gpio_id;
packet->item[0].value = config | ljca_gpio->connect_mode[gpio_id];
packet->num = 1;
ret = ljca_transfer(ljca_gpio->ljca, LJCA_GPIO_CONFIG, (u8 *)packet,
struct_size(packet, item, packet->num), NULL, 0);