Module Name: src
Committed By: jmcneill
Date: Sun Jun 30 09:30:45 UTC 2024
Modified Files:
src/sys/dev/pci: pci_resource.c
Log Message:
pci_resource: Make unexpected bus numbers in bridges non-fatal.
Firmware bugs happen. Log a warning and continue instead of panicing.
To generate a diff of this commit:
cvs rdiff -u -r1.4 -r1.5 src/sys/dev/pci/pci_resource.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/dev/pci/pci_resource.c
diff -u src/sys/dev/pci/pci_resource.c:1.4 src/sys/dev/pci/pci_resource.c:1.5
--- src/sys/dev/pci/pci_resource.c:1.4 Sun Nov 12 13:56:20 2023
+++ src/sys/dev/pci/pci_resource.c Sun Jun 30 09:30:45 2024
@@ -1,4 +1,4 @@
-/* $NetBSD: pci_resource.c,v 1.4 2023/11/12 13:56:20 jmcneill Exp $ */
+/* $NetBSD: pci_resource.c,v 1.5 2024/06/30 09:30:45 jmcneill Exp $ */
/*-
* Copyright (c) 2022 Jared McNeill <[email protected]>
@@ -35,7 +35,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pci_resource.c,v 1.4 2023/11/12 13:56:20 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pci_resource.c,v 1.5 2024/06/30 09:30:45 jmcneill Exp $");
#include <sys/param.h>
#include <sys/bus.h>
@@ -136,7 +136,7 @@ struct pci_resources {
vmem_t *pr_res[NUM_PCI_RANGES];
};
-static void pci_resource_scan_bus(struct pci_resources *,
+static int pci_resource_scan_bus(struct pci_resources *,
struct pci_device *, uint8_t);
#define PCI_SBDF_FMT "%04x:%02x:%02x.%u"
@@ -524,7 +524,11 @@ pci_resource_scan_device(struct pci_reso
bridge_bus = pci_conf_read(pr->pr_pc, tag, PCI_BRIDGE_BUS_REG);
sec_bus = PCI_BRIDGE_BUS_NUM_SECONDARY(bridge_bus);
if (sec_bus <= pr->pr_endbus) {
- pci_resource_scan_bus(pr, pd, sec_bus);
+ if (pci_resource_scan_bus(pr, pd, sec_bus) != 0) {
+ DPRINT("PCI: " PCI_SBDF_FMT " bus %u "
+ "already scanned (firmware bug!)\n",
+ PCI_SBDF_FMT_ARGS(pr, pd), sec_bus);
+ }
}
}
@@ -536,7 +540,7 @@ pci_resource_scan_device(struct pci_reso
*
* Enumerate devices on a bus, recursively.
*/
-static void
+static int
pci_resource_scan_bus(struct pci_resources *pr,
struct pci_device *bridge_dev, uint8_t busno)
{
@@ -552,8 +556,7 @@ pci_resource_scan_bus(struct pci_resourc
* Firmware has configured more than one bridge with the
* same secondary bus number.
*/
- panic("Bus %u already scanned (firmware bug!)", busno);
- return;
+ return EINVAL;
}
pb = pci_new_bus(pr, busno, bridge_dev);
@@ -570,6 +573,8 @@ pci_resource_scan_bus(struct pci_resourc
pci_resource_scan_device(pr, pb, devno, funcno);
}
}
+
+ return 0;
}
/*
