Messages in this thread | | | Date | Mon, 9 May 2011 14:35:36 -0700 | From | Jesse Barnes <> | Subject | Re: [PATCH] pci, e1000e: Add and use __pci_disable_link_state |
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On Sun, 08 May 2011 11:54:32 -0700 Yinghai Lu <yinghai@kernel.org> wrote:
> > Need to use it in _e1000e_disable_aspm. > when aer happens, > pci_walk_bus already have down_read(&pci_bus_sem)... > then report_slot_reset > ==> e1000_io_slot_reset > ==> e1000e_disable_aspm > ==> pci_disable_link_state... > > We can not use pci_disable_link_state, and it will try to hold pci_bus_sem again. > > Try to have __pci_disable_link_state that will not need to hold pci_bus_sem.
What about the other callers of e1000e_disable_aspm? Do they already have the lock held or is it just reset that needs the already locked version?
> +extern void __pci_disable_link_state(struct pci_dev *pdev, int state); > extern void pcie_clear_aspm(void); > extern void pcie_no_aspm(void); > #else
pci_disable_link_state_locked would be more descriptive and would match other usage in the kernel.
Thanks,
-- Jesse Barnes, Intel Open Source Technology Center
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