PCI_READ_LEGACY_IO(9)                  Hardware Interfaces                  PCI_READ_LEGACY_IO(9)



NAME
       pci_read_legacy_io - read byte(s) from legacy I/O port space

SYNOPSIS
       ssize_t pci_read_legacy_io(struct file * filp, struct kobject * kobj,
                                  struct bin_attribute * bin_attr, char * buf, loff_t off,
                                  size_t count);

ARGUMENTS
       filp
           open sysfs file

       kobj
           kobject corresponding to file to read from

       bin_attr
           struct bin_attribute for this file

       buf
           buffer to store results

       off
           offset into legacy I/O port space

       count
           number of bytes to read

DESCRIPTION
       Reads 1, 2, or 4 bytes from legacy I/O port space using an arch specific callback routine
       (pci_legacy_read).

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