cxl: Check if vphb exists before iterating over AFU devices

During an eeh a kernel-oops is reported if no vPHB is allocated to the
AFU. This happens as during AFU init, an error in creation of vPHB is
a non-fatal error. Hence afu->phb should always be checked for NULL
before iterating over it for the virtual AFU pci devices.

This patch fixes the kenel-oops by adding a NULL pointer check for
afu->phb before it is dereferenced.

Fixes: 9e8df8a21963 ("cxl: EEH support")
Cc: [email protected] # v4.3+
Signed-off-by: Vaibhav Jain <[email protected]>
Acked-by: Andrew Donnellan <[email protected]>
Acked-by: Frederic Barrat <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>

0 files changed, 0 insertions, 0 deletions