__PCI_RESET_FUNCTION(9)                Hardware Interfaces                __PCI_RESET_FUNCTION(9)



NAME
       __pci_reset_function_locked - reset a PCI device function while holding the dev mutex
       lock.

SYNOPSIS
       int __pci_reset_function_locked(struct pci_dev * dev);

ARGUMENTS
       dev
           PCI device to reset

DESCRIPTION
       Some devices allow an individual function to be reset without affecting other functions in
       the same device. The PCI device must be responsive to PCI config space in order to use
       this function.

       The device function is presumed to be unused and the caller is holding the device mutex
       lock when this function is called. Resetting the device will make the contents of PCI
       configuration space random, so any caller of this must be prepared to reinitialise the
       device including MSI, bus mastering, BARs, decoding IO and memory spaces, etc.

       Returns 0 if the device function was successfully reset or negative if the device doesn't
       support resetting a single function.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                   __PCI_RESET_FUNCTION(9)