kernel/linux.git/drivers/gpio/gpio-ljca.c, branch v6.12.80Linux kernel stable tree (mirror)https://git.radix-linux.su/kernel/linux.git/atom?h=v6.12.802025-10-29T13:08:59+00:00gpio: ljca: Fix duplicated IRQ mapping2025-10-29T13:08:59+00:00Haotian Zhangvulab@iscas.ac.cn2025-10-23T07:02:30+00:00urn:sha1:f999680473c98ff85f6cd11d35dbade23c56af26
[ Upstream commit 4c4e6ea4a120cc5ab58e437c6ba123cbfc357d45 ]
The generic_handle_domain_irq() function resolves the hardware IRQ
internally. The driver performed a duplicative mapping by calling
irq_find_mapping() first, which could lead to an RCU stall.
Delete the redundant irq_find_mapping() call and pass the hardware IRQ
directly to generic_handle_domain_irq().
Fixes: c5a4b6fd31e8 ("gpio: Add support for Intel LJCA USB GPIO driver")
Signed-off-by: Haotian Zhang <vulab@iscas.ac.cn>
Link: https://lore.kernel.org/r/20251023070231.1305-1-vulab@iscas.ac.cn
[Bartosz: remove unused variable]
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
gpio: ljca: Initialize num before accessing item in ljca_gpio_config2024-12-19T17:13:01+00:00Haoyu Lilihaoyu499@gmail.com2024-12-03T14:14:51+00:00urn:sha1:e4dbfa63612b7555521aad82c7502ba0da631aea
commit 3396995f9fb6bcbe0004a68118a22f98bab6e2b9 upstream.
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: 1034cc423f1b ("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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
gpio: update Intel LJCA USB GPIO driver2023-10-11T09:33:38+00:00Wentong Wuwentong.wu@intel.com2023-10-09T06:33:25+00:00urn:sha1:1034cc423f1b4a7a9a56d310ca980fcd2753e11d
This driver communicate with LJCA GPIO module with specific
protocol through interfaces exported by LJCA USB driver.
Update the driver according to LJCA USB driver's changes.
Signed-off-by: Wentong Wu <wentong.wu@intel.com>
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/1696833205-16716-5-git-send-email-wentong.wu@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
gpio: Add support for Intel LJCA USB GPIO driver2023-04-26T10:40:29+00:00Ye Xiangxiang.ye@intel.com2023-02-25T14:01:15+00:00urn:sha1:c5a4b6fd31e8cbc749f7ac9ff6c3a6118f3e5011
This patch implements the GPIO function of Intel USB-I2C/GPIO/SPI adapter
device named "La Jolla Cove Adapter" (LJCA). It communicate with LJCA
GPIO module with specific protocol through interfaces exported by LJCA USB
driver.
Signed-off-by: Ye Xiang <xiang.ye@intel.com>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230225140118.2037220-3-xiang.ye@intel.com