From: Stefan Windfeldt-Prytz <stefan.windfeldt@axis.com>
To: jic23@kernel.org
Cc: knaack.h@gmx.de, lars@metafoo.de, ppmeerw@pmeerw.net,
linux-iio@vger.kernel.org,
Stefan Windfeldt-Prytz <stefanw@axis.com>
Subject: [PATCH] iio: buffer: check if a buffer has been set up when poll is called
Date: Thu, 15 Feb 2018 08:19:18 +0100 [thread overview]
Message-ID: <1518679158-16604-1-git-send-email-stefan.windfeldt@axis.com> (raw)
If no iio buffer has been set up and poll is called return 0.
Change-Id: I79809c366e2206cfea6159ff8b0a12a988ee549f
Signed-off-by: Stefan Windfeldt-Prytz <stefan.windfeldt@axis.com>
---
drivers/iio/industrialio-buffer.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c
index 79abf70..cd5bfe3 100644
--- a/drivers/iio/industrialio-buffer.c
+++ b/drivers/iio/industrialio-buffer.c
@@ -175,7 +175,7 @@ __poll_t iio_buffer_poll(struct file *filp,
struct iio_dev *indio_dev = filp->private_data;
struct iio_buffer *rb = indio_dev->buffer;
- if (!indio_dev->info)
+ if (!indio_dev->info || rb == NULL)
return 0;
poll_wait(filp, &rb->pollq, wait);
--
2.1.4
reply other threads:[~2018-02-15 7:19 UTC|newest]
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