kernel/linux
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-10-09 18:15:49 +00:00
Code Issues Releases Packages Activity

s390/pci: Recover handle in clp_set_pci_fn()

Browse source 
When we try to recover a PCI function using

    echo 1 > /sys/bus/pci/devices/<id>/recover

or manually with

    echo 1 > /sys/bus/pci/devices/<id>/remove
    echo 0 > /sys/bus/pci/slots/<slot>/power
    echo 1 > /sys/bus/pci/slots/<slot>/power

clp_disable_fn() / clp_enable_fn() call clp_set_pci_fn() to first
disable and then reenable the function.

When the function is already in the requested state we may be left with
an invalid function handle.

To get a new valid handle we do a clp_list_pci() call. For this we need
both the function ID and function handle in clp_set_pci_fn() so pass the
zdev and get both.

To simplify things also pull setting the refreshed function handle into
clp_set_pci_fn()

Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Niklas Schnelle 2019-12-17 09:34:46 +01:00 • committed by Vasily Gorbik
commit 17cdec960c
3 changed files with 31 additions and 21 deletions
Download patch file Download diff file Expand all files Collapse all files