diff options
| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2015-07-28 19:11:40 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-07-29 09:11:52 +0200 |
| commit | 515f022e8b59ce928fe5d82affb3e93ab53d12ed (patch) | |
| tree | cc84e1aba2bcc35fb17ce043d582cd48290d6d36 /arch/s390/pci/pci_event.c | |
| parent | 2b1df72416a858f928c4edcbbb7f13b8dfc10a35 (diff) | |
| download | linux-515f022e8b59ce928fe5d82affb3e93ab53d12ed.tar.bz2 | |
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>
Diffstat (limited to 'arch/s390/pci/pci_event.c')
| -rw-r--r-- | arch/s390/pci/pci_event.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/arch/s390/pci/pci_event.c b/arch/s390/pci/pci_event.c index ed2394dd14e9..eef76f0e6873 100644 --- a/arch/s390/pci/pci_event.c +++ b/arch/s390/pci/pci_event.c @@ -46,15 +46,13 @@ struct zpci_ccdf_avail { static void __zpci_event_error(struct zpci_ccdf_err *ccdf) { struct zpci_dev *zdev = get_zdev_by_fid(ccdf->fid); + struct pci_dev *pdev = zdev ? zdev->pdev : NULL; zpci_err("error CCDF:\n"); zpci_err_hex(ccdf, sizeof(*ccdf)); - if (!zdev) - return; - pr_err("%s: Event 0x%x reports an error for PCI function 0x%x\n", - pci_name(zdev->pdev), ccdf->pec, ccdf->fid); + pdev ? pci_name(pdev) : "n/a", ccdf->pec, ccdf->fid); } void zpci_event_error(void *data) |