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Fri, 04 Oct 2024 07:43:37 -0700 (PDT) From: Bartosz Golaszewski Date: Fri, 04 Oct 2024 16:43:25 +0200 Subject: [PATCH 4/5] gpiolib: simplify notifying user-space about line requests Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241004-gpio-notify-in-kernel-events-v1-4-8ac29e1df4fe@linaro.org> References: <20241004-gpio-notify-in-kernel-events-v1-0-8ac29e1df4fe@linaro.org> In-Reply-To: <20241004-gpio-notify-in-kernel-events-v1-0-8ac29e1df4fe@linaro.org> To: Linus Walleij , Bartosz Golaszewski , Kent Gibson Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, Bartosz Golaszewski X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2017; i=bartosz.golaszewski@linaro.org; h=from:subject:message-id; bh=Rj60/yZ4gwl7HOw1XZWCqUwfUu0FrUco9KYhnC3+nbs=; b=owEBbAKT/ZANAwAKARGnLqAUcddyAcsmYgBm//8VC6Tw0qUqhumeXIZLVVKV/gzX6Jg6TeoDf Cv8Tb91hT2JAjIEAAEKAB0WIQQWnetsC8PEYBPSx58Rpy6gFHHXcgUCZv//FQAKCRARpy6gFHHX cokHD/Y1dTlGBuGjnh34+xOD4dNiEXGgmW/phkq5Z2CArTeC4p1OQWmdBvyMPgvU4oEQJFle+0h 35dvy4nvSwVJRILKHkR5O3mZGrJUx71JsoOIhrrW5Y5ojDRVEC11KBe5Z9FCdpeLaprJ4K/P9XY /NEoE0/rZISjQHStAPGr6Eugqs15fpAiftfMjIIJQQH40Y4WC6KB+CBxJp3vCjBUsfNCBw6BMcB YWv7DzDxqDZPYoxA+O9XLt95I4/YteHThJzvdh1iNhabb6fR1YN6DSHdA8f42EI2DA41p/FcHsV qv7n92zA3CKx0BXaP7/WNiVu2m4xJ7vLRyxzmItodwR4XGfNkMXqVfJIYcOztB4CHXHNyUQihMa lRX++daLYWtAkHdnu0eM8kEth6wK7czDqvCfE8AiuQNZVK2u6AbMX0t2ZLtOuPmD4xmmWNQdxh3 qT90mBvuwtzv05nclkF35Upb3TqjItNrnwHxsofRBowzxolC4a0TnpemdFeCyv4mqGKlWg8HB4a tSQlWdYkoWcRVoRLYOCv7xok+6OhCVOfXeVWwxGAnDtPPjkWqHTXc0j6FZYjKcqdWPzsvw/tAVD NyaLyh0zhPx8GCbo1lcncH7x6Y0N/ielIXePHIvCFhj8S0csekaCDHZjiLQWfb9/pRbbGEA0k5W RmEWk5AehbEgk X-Developer-Key: i=bartosz.golaszewski@linaro.org; a=openpgp; fpr=169DEB6C0BC3C46013D2C79F11A72EA01471D772 From: Bartosz Golaszewski Instead of emitting the line state change event on request in three different places, just do it once, closer to the source: in gpiod_request_commit(). Signed-off-by: Bartosz Golaszewski --- drivers/gpio/gpiolib-cdev.c | 6 ------ drivers/gpio/gpiolib.c | 4 ++-- 2 files changed, 2 insertions(+), 8 deletions(-) diff --git a/drivers/gpio/gpiolib-cdev.c b/drivers/gpio/gpiolib-cdev.c index b0050250ac3a..f614a981253d 100644 --- a/drivers/gpio/gpiolib-cdev.c +++ b/drivers/gpio/gpiolib-cdev.c @@ -372,8 +372,6 @@ static int linehandle_create(struct gpio_device *gdev, void __user *ip) goto out_free_lh; } - gpiod_line_state_notify(desc, GPIO_V2_LINE_CHANGED_REQUESTED); - dev_dbg(&gdev->dev, "registered chardev handle for line %d\n", offset); } @@ -1842,8 +1840,6 @@ static int linereq_create(struct gpio_device *gdev, void __user *ip) lr->lines[i].edflags = edflags; - gpiod_line_state_notify(desc, GPIO_V2_LINE_CHANGED_REQUESTED); - dev_dbg(&gdev->dev, "registered chardev handle for line %d\n", offset); } @@ -2234,8 +2230,6 @@ static int lineevent_create(struct gpio_device *gdev, void __user *ip) if (ret) goto out_free_le; - gpiod_line_state_notify(desc, GPIO_V2_LINE_CHANGED_REQUESTED); - irq = gpiod_to_irq(desc); if (irq <= 0) { ret = -ENODEV; diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 97346b746ef5..190ece4d6850 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -2345,6 +2345,8 @@ static int gpiod_request_commit(struct gpio_desc *desc, const char *label) if (ret) goto out_clear_bit; + gpiod_line_state_notify(desc, GPIO_V2_LINE_CHANGED_REQUESTED); + return 0; out_clear_bit: @@ -4365,8 +4367,6 @@ struct gpio_desc *gpiod_find_and_request(struct device *consumer, return ERR_PTR(ret); } - gpiod_line_state_notify(desc, GPIO_V2_LINE_CHANGED_REQUESTED); - return desc; }