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linux: Fix platform device PCI detection for complex bus topologies 

Suppose you're in a Hyper-V guest and are trying to use PCI passthrough.
The ID_PATH that udev will construct for that looks something like
"acpi-VMBUS:00-pci-b8c8:00:00.0", and obviously looking for "pci-" in
the first four characters of that is going to not work.

Instead, strstr. I suppose it's possible you could have _multiple_ PCI
buses in the path, in which case you'd want strrstr, if that were a
thing.
This commit is contained in:
Adam Jackson 2019-06-19 14:23:56 -04:00 committed by Adam Jackson
parent b3f3d65ed3
commit 9acff30943
1 changed files with 3 additions and 3 deletions
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6
config/udev.c
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@ -474,7 +474,7 @@ config_udev_odev_setup_attribs(struct udev_device *udev_device, const char *path
config_odev_probe_proc_ptr probe_callback)
{
struct OdevAttributes *attribs = config_odev_allocate_attributes();
const char *value;
const char *value, *str;
attribs->path = XNFstrdup(path);
attribs->syspath = XNFstrdup(syspath);
@ -482,8 +482,8 @@ config_udev_odev_setup_attribs(struct udev_device *udev_device, const char *path
attribs->minor = minor;
value = udev_device_get_property_value(udev_device, "ID_PATH");
if (value && !strncmp(value, "pci-", 4)) {
attribs->busid = XNFstrdup(value);
if (value && (str = strstr(value, "pci-"))) {
attribs->busid = XNFstrdup(str);
attribs->busid[3] = ':';
}