From: Cristina Opriceana Date: Mon, 3 Aug 2015 10:37:40 +0000 (+0300) Subject: iio: industrialio-buffer: Fix iio_buffer_poll return value X-Git-Tag: v4.2.1~100 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b424b198e8f34e88c2e6fea995a626d188089be8;p=thirdparty%2Fkernel%2Fstable.git iio: industrialio-buffer: Fix iio_buffer_poll return value 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 --- diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index 6eee1b044c60e..b3fda9ee41747 100644 --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -151,7 +151,7 @@ unsigned int iio_buffer_poll(struct file *filp, struct iio_buffer *rb = indio_dev->buffer; if (!indio_dev->info) - return -ENODEV; + return 0; poll_wait(filp, &rb->pollq, wait); if (iio_buffer_ready(indio_dev, rb, rb->watermark, 0))