On Wed, 03 Jan 2018, Sinan Kaya wrote:
> 'Commit cc27b735ad3a ("PCI/portdrv: Turn off PCIe services during
> shutdown")' revealed a resource leak in rtsx_pci driver during shutdown.
>
> Issue shows up as a warning during shutdown as follows:
>
> remove_proc_entry: removing non-empty directory 'irq/17', leaking at least
> 'rtsx_pci'
> WARNING: CPU: 0 PID: 1578 at fs/proc/generic.c:572
> remove_proc_entry+0x11d/0x130
> Modules linked in <long list but none that are out-of-tree>
> ...
> Call Trace:
> unregister_irq_proc
> free_desc
> irq_free_descs
> mp_unmap_irq
> acpi_unregister_gsi_apic
> acpi_pci_irq_disable
> do_pci_disable_device
> pci_disable_device
> device_shutdown
> kernel_restart
> Sys_reboot
>
> Even though rtsx_pci driver implements a shutdown callback, it is not
> releasing the interrupt that it registered during probe. This is causing
> the ACPI layer to complain that the shared IRQ is in use while freeing
> IRQ.
>
> This code releases the IRQ to prevent resource leak and eliminate the
> warning.
>
> Link: https://bugzilla.kernel.org/show_bug.cgi?id=198141
> Reported-by: Chris Clayton <chris2553@xxxxxxxxxxxxxx>
> Fixes: cc27b735ad3a ("PCI/portdrv: Turn off PCIe services during shutdown")
> Signed-off-by: Sinan Kaya <okaya@xxxxxxxxxxxxxx>
> ---
> drivers/mfd/rtsx_pcr.c | 3 +++
> 1 file changed, 3 insertions(+)
Applied, thanks.
--
Lee Jones
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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