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Niklas Schnelle 4b3da4c883 s390/pci: Recover handle in clp_set_pci_fn() [ Upstream commit `17cdec960c` ] 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> Signed-off-by: Sasha Levin <sashal@kernel.org>	History 2020-02-24 08:38:51 +01:00
..
asm	s390/pci: Recover handle in clp_set_pci_fn()	2020-02-24 08:38:51 +01:00
uapi/asm	arch: ipcbuf.h: make uapi asm/ipcbuf.h self-contained	2019-12-04 19:44:14 -08:00

Niklas Schnelle 4b3da4c883 s390/pci: Recover handle in clp_set_pci_fn()

[ Upstream commit 17cdec960c ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

History

2020-02-24 08:38:51 +01:00

asm s390/pci: Recover handle in clp_set_pci_fn() 2020-02-24 08:38:51 +01:00

uapi/asm arch: ipcbuf.h: make uapi asm/ipcbuf.h self-contained 2019-12-04 19:44:14 -08:00