From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.kernel.org ([198.145.29.99]:46038 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730200AbeJIB6D (ORCPT ); Mon, 8 Oct 2018 21:58:03 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Timur Tabi , Jan Lorenzen , Jim Paris , Ricardo Ribalda Delgado , Linus Walleij Subject: [PATCH 4.14 89/94] gpiolib: Free the last requested descriptor Date: Mon, 8 Oct 2018 20:32:10 +0200 Message-Id: <20181008175610.789945857@linuxfoundation.org> In-Reply-To: <20181008175605.067676667@linuxfoundation.org> References: <20181008175605.067676667@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ricardo Ribalda Delgado commit 19a4fbffc94e41abaa2a623a25ce2641d69eccf0 upstream. The current code only frees N-1 gpios if an error occurs during gpiod_set_transitory, gpiod_direction_output or gpiod_direction_input. Leading to gpios that cannot be used by userspace nor other drivers. Cc: Timur Tabi Cc: stable@vger.kernel.org Fixes: ab3dbcf78f60f46d ("gpioib: do not free unrequested descriptors) Reported-by: Jan Lorenzen Reported-by: Jim Paris Signed-off-by: Ricardo Ribalda Delgado Signed-off-by: Linus Walleij Signed-off-by: Greg Kroah-Hartman --- drivers/gpio/gpiolib.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -489,7 +489,7 @@ static int linehandle_create(struct gpio if (ret) goto out_free_descs; lh->descs[i] = desc; - count = i; + count = i + 1; if (lflags & GPIOHANDLE_REQUEST_ACTIVE_LOW) set_bit(FLAG_ACTIVE_LOW, &desc->flags);