When running 3.9.0-rc7-next-20130416, the issue below prevents my
machine from booting:
[ 0.409057] ------------[ cut here ]------------
[ 0.409868] kernel BUG at drivers/pci/bus.c:213!
[ 0.410000] invalid opcode: 0000 [#1] PREEMPT SMP
[ 0.410000] Modules linked in:
[ 0.410000] CPU 0
[ 0.410000] Pid: 1, comm: swapper/0 Not tainted 3.9.0-rc7-next-20130416 #1 Bochs Bochs
[ 0.410000] RIP: 0010:[<ffffffff812f9232>] [<ffffffff812f9232>] pci_bus_add_devices+0xa2/0xb0
[ 0.410000] RSP: 0000:ffff88007c84bc78 EFLAGS: 00010246
[ 0.410000] RAX: 000000000000002b RBX: ffff88007be9a000 RCX: 0000000000000006
[ 0.410000] RDX: 0000000000000c00 RSI: ffff88007bcc0750 RDI: ffff88007bcc0000
[ 0.410000] RBP: ffff88007c84bc98 R08: 0000000000000000 R09: 0000000000000001
[ 0.410000] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88007bf3a828
[ 0.410000] R13: ffff88007bf3a800 R14: ffff88007beba080 R15: ffff88007c83a1e0
[ 0.410000] FS: 0000000000000000(0000) GS:ffff88007ce00000(0000) knlGS:0000000000000000
[ 0.410000] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 0.410000] CR2: ffff88000275a000 CR3: 0000000001a0b000 CR4: 00000000000006b0
[ 0.410000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 0.410000] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 0.410000] Process swapper/0 (pid: 1, threadinfo ffff88007c84a000, task ffff88007bcc0000)
[ 0.410000] Stack:
[ 0.410000] ffff88007beba000 ffff88007be89600 ffff88007beba000 0000000000000008
[ 0.410000] ffff88007c84bcd8 ffffffff81319663 0000000000000000 ffffffff813155bf
[ 0.410000] ffff88007c804c20 ffff88007beba000 ffffffff81a87920 0000000000000000
[ 0.410000] Call Trace:
[ 0.410000] [<ffffffff81319663>] acpi_pci_root_add+0x29d/0x302
[ 0.410000] [<ffffffff813155bf>] ? acpi_scan_match_handler+0x2f/0x71
[ 0.410000] [<ffffffff81315672>] acpi_bus_device_attach+0x71/0xc8
[ 0.410000] [<ffffffff8132ead1>] acpi_ns_walk_namespace+0xbe/0x179
[ 0.410000] [<ffffffff81315601>] ? acpi_scan_match_handler+0x71/0x71
[ 0.410000] [<ffffffff81315601>] ? acpi_scan_match_handler+0x71/0x71
[ 0.410000] [<ffffffff8132ef91>] acpi_walk_namespace+0x98/0xcb
[ 0.410000] [<ffffffff81cdb23d>] ? acpi_sleep_proc_init+0x2a/0x2a
[ 0.410000] [<ffffffff81316356>] acpi_bus_scan+0x8b/0x9f
[ 0.410000] [<ffffffff81cdb669>] acpi_scan_init+0x57/0x14b
It seems caused by commit cc8f7f9e4e79a0940af6b4b6fdfbcf18a03aa9f4.
It caused the device not to be added before sysfs_initialized is set.
For the devices added earlier, pci_create_sysfs_dev_files() is called in
late_initcall pci_sysfs_init().
The fix below ignores the error retval, if sysfs_initialized is not set.
I'm not sure whether I missed something.
--
diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index 445a99d..efebb6f 100644
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -175,7 +175,7 @@ int pci_bus_add_device(struct pci_dev *dev)
* are not assigned yet for some devices.
*/
retval = pci_create_sysfs_dev_files(dev);
- if (retval)
+ if (retval < 0 && is_sysfs_initialized())
return retval;
dev->match_driver = true;
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index b189c716..26827c5 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -1426,6 +1426,11 @@ void pci_remove_sysfs_dev_files(struct pci_dev *pdev)
}
+int is_sysfs_initialized()
+{
+ return sysfs_initialized;
+}
+
static int __init pci_sysfs_init(void)
{
struct pci_dev *pdev = NULL;
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 0f1b306..149b946 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -8,6 +8,7 @@
/* Functions internal to the PCI core code */
+int is_sysfs_initialized(void);
int __must_check pci_create_sysfs_dev_files(struct pci_dev *pdev);
void pci_remove_sysfs_dev_files(struct pci_dev *pdev);
#if !defined(CONFIG_DMI) && !defined(CONFIG_ACPI)
--
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