firewire: ohci: prevent leak of left-over IRQ on unbind

In the Linux kernel, the following vulnerability has been resolved:

firewire: ohci: prevent leak of left-over IRQ on unbind

Commit 5a95f1ded28691e6 ("firewire: ohci: use devres for requested IRQ")

also removed the call to free_irq() in pci_remove(), leading to a

leftover irq of devm_request_irq() at pci_disable_msi() in pci_remove()

when unbinding the driver from the device

remove_proc_entry: removing non-empty directory 'irq/136', leaking at

least 'firewire_ohci'

Call Trace:

? remove_proc_entry+0x19c/0x1c0

? __warn+0x81/0x130

? remove_proc_entry+0x19c/0x1c0

? report_bug+0x171/0x1a0

? console_unlock+0x78/0x120

? handle_bug+0x3c/0x80

? exc_invalid_op+0x17/0x70

? asm_exc_invalid_op+0x1a/0x20

? remove_proc_entry+0x19c/0x1c0

unregister_irq_proc+0xf4/0x120

free_desc+0x3d/0xe0

? kfree+0x29f/0x2f0

irq_free_descs+0x47/0x70

msi_domain_free_locked.part.0+0x19d/0x1d0

msi_domain_free_irqs_all_locked+0x81/0xc0

pci_free_msi_irqs+0x12/0x40

pci_disable_msi+0x4c/0x60

pci_remove+0x9d/0xc0 [firewire_ohci

01b483699bebf9cb07a3d69df0aa2bee71db1b26]

pci_device_remove+0x37/0xa0

device_release_driver_internal+0x19f/0x200

unbind_store+0xa1/0xb0

remove irq with devm_free_irq() before pci_disable_msi()

also remove it in fail_msi: of pci_probe() as this would lead to

an identical leak