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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-02-20 12:03:22 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-02-20 12:03:22 +0300
commitc6754712e05317923e3f67ac01d45c7d5ec6f79f (patch)
treee8ca596b9a911221b2afd845bb5d66318fe2b0b3 /drivers/iio/industrialio-buffer.c
parent6d79bd5bb6c79a9dba4842040c9adf39e7806330 (diff)
parent4cd140bda6494543f1c1b0ccceceaa44b676eef6 (diff)
downloadlinux-c6754712e05317923e3f67ac01d45c7d5ec6f79f.tar.xz
Merge tag 'iio-fixes-for-4.16a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus
Jonathan writes: First round of IIO fixes for the 4.16 cycle. One nasty very old crash around polling for buffers that aren't there - though that can only cause effects on drivers that support events but not buffers. * buffer / kfifo handling in the core. - Check there is a buffer and return 0 from poll directly if there isn't. Poll doesn't make sense in this circumstances, but best to close the hole. * ad5933 - Change the marked buffer mode to a software buffer as the meaning of the hardware buffer label has long since changed and this uses a front end software buffer anyway. * ad7192 - Fix the fact the external clock frequency was only set when using the internal clock which was less than helpful. * adis_lib - Initialize the trigger before requesting the interrupt. Some newer parts can power up with interrupt generation enabled so ordering now matters. * aspeed-adc - Fix an errror handling path as labels and general ordering were wrong. * srf08 - Fix a link error due to undefined devm_iio_triggered_buffer_setup. * stm32-adc - Fix error handling unwind squence in stm32h7_adc_enable.
Diffstat (limited to 'drivers/iio/industrialio-buffer.c')
-rw-r--r--drivers/iio/industrialio-buffer.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c
index 79abf70a126d..cd5bfe39591b 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);