Hi Markus,

Le lundi 17 juin 2024 à 08:56 +0200, Markus Elfring a écrit :

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+++ b/drivers/iio/industrialio-buffer.c

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static int iio_buffer_chrdev_release(struct inode *inode, struct file *filep)  {

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wake_up(&buffer->pollq);

• mutex_lock(&buffer->dmabufs_mutex);
• /* Close all attached DMABUFs */

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• mutex_unlock(&buffer->dmabufs_mutex);

kfree(ib);

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Would you become interested to apply a statement like “guard(mutex)(&buffer->dmabufs_mutex);”? https://elixir.bootlin.com/linux/v6.10-rc3/source/include/linux/mutex.h#L196

I'll update the patch to use it.

Cheers, -Paul