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authorSebastian Ott <sebott@linux.vnet.ibm.com>2013-12-12 17:48:32 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2013-12-16 14:37:54 +0100
commitaa3b7c296732b4351dfdbfe70be6b38a0882be14 (patch)
treec05230a7a6b82675a8b704cae62ed2af3bf8b19f /arch/s390/pci/pci_event.c
parent99c64b6679c41d8238b154c1a462724d7101765c (diff)
downloadlinux-aa3b7c296732b4351dfdbfe70be6b38a0882be14.tar.bz2
s390/pci: prevent inadvertently triggered bus scans
Initialization and scanning of the pci bus is omitted on older machines without pci support or if pci=off was specified. Remember the fact that we ran without pci support and prevent further bus scans during resume from hibernate or after receiving hotplug notifications. Reported-by: Stefan Haberland <stefan.haberland@de.ibm.com> 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.c18
1 files changed, 14 insertions, 4 deletions
diff --git a/arch/s390/pci/pci_event.c b/arch/s390/pci/pci_event.c
index 800f064b0da7..228787a3630a 100644
--- a/arch/s390/pci/pci_event.c
+++ b/arch/s390/pci/pci_event.c
@@ -43,9 +43,8 @@ struct zpci_ccdf_avail {
u16 pec; /* PCI event code */
} __packed;
-void zpci_event_error(void *data)
+static void __zpci_event_error(struct zpci_ccdf_err *ccdf)
{
- struct zpci_ccdf_err *ccdf = data;
struct zpci_dev *zdev = get_zdev_by_fid(ccdf->fid);
zpci_err("error CCDF:\n");
@@ -58,9 +57,14 @@ void zpci_event_error(void *data)
pci_name(zdev->pdev), ccdf->pec, ccdf->fid);
}
-void zpci_event_availability(void *data)
+void zpci_event_error(void *data)
+{
+ if (zpci_is_enabled())
+ __zpci_event_error(data);
+}
+
+static void __zpci_event_availability(struct zpci_ccdf_avail *ccdf)
{
- struct zpci_ccdf_avail *ccdf = data;
struct zpci_dev *zdev = get_zdev_by_fid(ccdf->fid);
struct pci_dev *pdev = zdev ? zdev->pdev : NULL;
int ret;
@@ -115,3 +119,9 @@ void zpci_event_availability(void *data)
break;
}
}
+
+void zpci_event_availability(void *data)
+{
+ if (zpci_is_enabled())
+ __zpci_event_availability(data);
+}