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s390/pci: handle events for unused functions
authorSebastian Ott <sebott@linux.vnet.ibm.com>
Tue, 28 Jul 2015 17:11:40 +0000 (19:11 +0200)
committerMartin Schwidefsky <schwidefsky@de.ibm.com>
Wed, 29 Jul 2015 07:11:52 +0000 (09:11 +0200)
commit515f022e8b59ce928fe5d82affb3e93ab53d12ed
treecc84e1aba2bcc35fb17ce043d582cd48290d6d36
parent2b1df72416a858f928c4edcbbb7f13b8dfc10a35
s390/pci: handle events for unused functions

Receiving error events for a pci function that's currently not in use
will crash the kernel. For example the procedure for FW upgrades might
include:
* remove the function from Linux
* apply FW upgrade
* rescan for new functions

Receiving an event during the FW upgrade will result in a use after free
when printing the functions name. Just print "n/a" in such cases.

Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
arch/s390/pci/pci_event.c