s390/pci: Pull search for parent PF out of zpci_iov_setup_virtfn()

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commit 05793884a1 upstream.

This creates a new zpci_iov_find_parent_pf() function which a future
commit can use to find if a VF has a configured parent PF. Use
zdev->rid instead of zdev->devfn such that the new function can be used
before it has been decided if the RID will be exposed and zdev->devfn is
set. Also handle the hypotheical case that the RID is not available but
there is an otherwise matching zbus.

Fixes: 25f39d3dcb ("s390/pci: Ignore RID for isolated VFs")
Cc: stable@vger.kernel.org
Reviewed-by: Halil Pasic <pasic@linux.ibm.com>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Niklas Schnelle 2025-02-07 13:30:16 +01:00 • committed by Greg Kroah-Hartman

parent a6a7e8b5a9

commit c746d3eb0d

1 changed files with 42 additions and 14 deletions

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arch/s390/pci/pci_iov.c

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