Hi, On Tue, 27 Feb 2024 12:34:23 +0100 Herve Codina <herve.codina@xxxxxxxxxxx> wrote: > Hi, > > When a gpio chip device is removed while some related gpio are used by > the user-space (gpiomon for instance), the following warning can appear: > remove_proc_entry: removing non-empty directory 'irq/233', leaking at least 'gpiomon' > WARNING: CPU: 2 PID: 72 at fs/proc/generic.c:717 remove_proc_entry+0x190/0x19c > ... > Call trace: > remove_proc_entry+0x190/0x19c > unregister_irq_proc+0xd0/0x104 > free_desc+0x4c/0xc4 > irq_free_descs+0x6c/0x90 > irq_dispose_mapping+0x104/0x14c > gpiochip_irqchip_remove+0xcc/0x1a4 > gpiochip_remove+0x48/0x100 > ... > > Indeed, even if the gpio removal is notified to the gpio-cdev, the > IRQ used is not released when it should be. > > This series calls the gpio removal notifier sooner in the removal > process in order to give a chance to a notifier function to release > the IRQ before releasing the IRQ mapping and adds the needed > operations to release the IRQ in the gpio cdev notifier function. > This series is obsolete. The issue is fixed by the following Bartosz's patch: https://lore.kernel.org/lkml/20240919135104.3583-1-brgl@xxxxxxxx/ Best regards, Hervé