From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Duggan Subject: [PATCH 04/26] Input: synaptics-rmi4 - prevent oopses when irq arrives while the device is not bound Date: Thu, 5 Nov 2015 15:37:25 -0800 Message-ID: <1446766645-30350-1-git-send-email-aduggan@synaptics.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: Sender: linux-kernel-owner@vger.kernel.org To: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Benjamin Tissoires , Dmitry Torokhov , Linus Walleij , Benjamin Tissoires , Christopher Heiny , Stephen Chandler Paul List-Id: linux-input@vger.kernel.org From: Benjamin Tissoires If the device has been registered but is not populated, we should not process any incoming interrupt. Make sure the pointers we are following are valid. Signed-off-by: Benjamin Tissoires Tested-by: Andrew Duggan --- drivers/input/rmi4/rmi_driver.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/input/rmi4/rmi_driver.c b/drivers/input/rmi4/rmi_driver.c index 2fdc7e8..fe5f2f9 100644 --- a/drivers/input/rmi4/rmi_driver.c +++ b/drivers/input/rmi4/rmi_driver.c @@ -279,6 +279,9 @@ int rmi_process_interrupt_requests(struct rmi_device *rmi_dev) struct rmi_function *entry; int error; + if (!data || !data->f01_container || !data->irq_status) + return 0; + error = rmi_read_block(rmi_dev, data->f01_container->fd.data_base_addr + 1, data->irq_status, data->num_of_irq_regs); -- 2.1.4