From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dmitry Torokhov Subject: Re: [PATCH v4 4/7] ACPI: button: Use input_device_enabled() helper Date: Wed, 24 Jun 2020 22:24:46 -0700 Message-ID: <20200625052446.GF248110@dtor-ws> References: <2336e15d-ff4b-bbb6-c701-dbf3aa110fcd@redhat.com> <20200608112211.12125-1-andrzej.p@collabora.com> <20200608112211.12125-5-andrzej.p@collabora.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20200608112211.12125-5-andrzej.p@collabora.com> Sender: linux-acpi-owner@vger.kernel.org To: Andrzej Pietrasiewicz Cc: linux-pm@vger.kernel.org, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-input@vger.kernel.org, linux-tegra@vger.kernel.org, patches@opensource.cirrus.com, ibm-acpi-devel@lists.sourceforge.net, platform-driver-x86@vger.kernel.org, "Rafael J . Wysocki" , Len Brown , Jonathan Cameron , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler , Kukjin Kim , Krzysztof Kozlowski , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team List-Id: linux-tegra@vger.kernel.org On Mon, Jun 08, 2020 at 01:22:08PM +0200, Andrzej Pietrasiewicz wrote: > A new helper is available, so use it. > > Signed-off-by: Andrzej Pietrasiewicz > --- > drivers/acpi/button.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c > index ff7ab291f678..4deb2b48d03c 100644 > --- a/drivers/acpi/button.c > +++ b/drivers/acpi/button.c > @@ -411,7 +411,7 @@ static void acpi_button_notify(struct acpi_device *device, u32 event) > input = button->input; > if (button->type == ACPI_BUTTON_TYPE_LID) { > mutex_lock(&button->input->mutex); > - users = button->input->users; > + users = input_device_enabled(button->input); > mutex_unlock(&button->input->mutex); > if (users) This chunk (pre-patch) is really wrong. 'users' value is obsolete and can not be trusted the moment we unlocked the mutex. "if" needs to be inside critical section. > acpi_lid_update_state(device, true); > @@ -460,7 +460,7 @@ static int acpi_button_resume(struct device *dev) > > button->suspended = false; > mutex_lock(&input->mutex); > - if (button->type == ACPI_BUTTON_TYPE_LID && input->users) { > + if (button->type == ACPI_BUTTON_TYPE_LID && input_device_enabled(input)) { > button->last_state = !!acpi_lid_evaluate_state(device); > button->last_time = ktime_get(); > acpi_lid_initialize_state(device); > -- > 2.17.1 > Thanks. -- Dmitry