Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965672AbbKEXfN (ORCPT ); Thu, 5 Nov 2015 18:35:13 -0500 Received: from us-mx2.synaptics.com ([192.147.44.131]:22071 "EHLO us-mx1.synaptics.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S965532AbbKEXeq (ORCPT ); Thu, 5 Nov 2015 18:34:46 -0500 X-PGP-Universal: processed; by securemail.synaptics.com on Thu, 05 Nov 2015 16:35:09 -0800 From: Andrew Duggan To: , CC: Benjamin Tissoires , Dmitry Torokhov , Linus Walleij , Benjamin Tissoires , Christopher Heiny , Stephen Chandler Paul Subject: [PATCH 04/26] Input: synaptics-rmi4 - prevent oopses when irq arrives while the device is not bound Date: Thu, 5 Nov 2015 15:34:04 -0800 Message-ID: <1446766466-30043-5-git-send-email-aduggan@synaptics.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1446766466-30043-1-git-send-email-aduggan@synaptics.com> References: <1446766466-30043-1-git-send-email-aduggan@synaptics.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.4.10.145] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1178 Lines: 34 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/