From d67afe5ed00070de0965bfc98de5f6ed3a80a73e Mon Sep 17 00:00:00 2001 From: David Miller Date: Fri, 10 Nov 2006 12:27:48 -0800 Subject: [PATCH] [PATCH] pci: don't try to remove sysfs files before they are setup. The PCI sysfs attributes are created after the initial PCI bus scan. With the addition of more return value checking and assertions in the device and sysfs layers we now can get dumps like this on sparc64: [ 20.135032] Call Trace: [ 20.135042] [0000000000537f88] pci_remove_bus_device+0x30/0xc0 [ 20.135076] [000000000078f890] pci_fill_in_pbm_cookies+0x98/0x440 [ 20.135109] [000000000042e828] sabre_scan_bus+0x230/0x400 [ 20.135139] [000000000078c710] pcibios_init+0x58/0xa0 [ 20.135159] [0000000000416f14] init+0x9c/0x2e0 [ 20.135190] [0000000000417a50] kernel_thread+0x38/0x60 [ 20.135211] [0000000000417170] rest_init+0x18/0x40 [ 20.135514] PCI0(PBMB): Bus running at 33MHz It's triggering because removal of the "config" PCI sysfs file for the device fails. On sparc64, after probing the device, we'll delete the PCI device via pci_remove_bus_device() if we cannot find the firmware device tree node corresponding to it. This is fine, but at this point the sysfs files for the PCI device won't be setup yet. So we should not try to do anything in pci_remove_sysfs_dev_files() if pci_sysfs_init() has not run yet. Signed-off-by: David S. Miller Acked-by: Greg Kroah-Hartman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/pci/pci-sysfs.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index a1d2e979b17..f952bfea48a 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -642,6 +642,9 @@ err: */ void pci_remove_sysfs_dev_files(struct pci_dev *pdev) { + if (!sysfs_initialized) + return; + if (pdev->cfg_size < 4096) sysfs_remove_bin_file(&pdev->dev.kobj, &pci_config_attr); else -- 2.20.1