__pci_reset_function_locked(9) centos man page | unix.com

__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 3.10					     June 2014						   __PCI_RESET_FUNCTION(9)