From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:57444 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755417AbbISR2F (ORCPT ); Sat, 19 Sep 2015 13:28:05 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Cristina Opriceana , Jonathan Cameron Subject: [PATCH 3.14 06/29] iio: industrialio-buffer: Fix iio_buffer_poll return value Date: Sat, 19 Sep 2015 10:27:28 -0700 Message-Id: <20150919171918.437297903@linuxfoundation.org> In-Reply-To: <20150919171918.169368855@linuxfoundation.org> References: <20150919171918.169368855@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Sender: stable-owner@vger.kernel.org List-ID: 3.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Cristina Opriceana commit 1bdc0293901cbea23c6dc29432e81919d4719844 upstream. Change return value to 0 if no device is bound since unsigned int cannot support negative error codes. Fixes: f18e7a068 ("iio: Return -ENODEV for file operations if the device has been unregistered") Signed-off-by: Cristina Opriceana Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/iio/industrialio-buffer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -96,7 +96,7 @@ unsigned int iio_buffer_poll(struct file struct iio_buffer *rb = indio_dev->buffer; if (!indio_dev->info) - return -ENODEV; + return 0; poll_wait(filp, &rb->pollq, wait); if (iio_buffer_data_available(rb))