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From b6e18eb57f3dd104704d0a5ec3d2f051645b9068 Mon Sep 17 00:00:00 2001
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From: Adam Jackson <ajax@redhat.com>
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Date: Wed, 19 Jun 2019 14:23:56 -0400
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Subject: [PATCH xserver] linux: Fix platform device PCI detection for complex
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bus topologies
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Suppose you're in a Hyper-V guest and are trying to use PCI passthrough.
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The ID_PATH that udev will construct for that looks something like
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"acpi-VMBUS:00-pci-b8c8:00:00.0", and obviously looking for "pci-" in
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the first four characters of that is going to not work.
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Instead, strstr. I suppose it's possible you could have _multiple_ PCI
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buses in the path, in which case you'd want strrstr, if that were a
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thing.
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---
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config/udev.c | 6 +++---
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1 file changed, 3 insertions(+), 3 deletions(-)
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diff --git a/config/udev.c b/config/udev.c
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index 314acba6ce..6e11aa3b88 100644
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--- a/config/udev.c
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+++ b/config/udev.c
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@@ -474,7 +474,7 @@ config_udev_odev_setup_attribs(struct udev_device *udev_device, const char *path
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config_odev_probe_proc_ptr probe_callback)
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{
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struct OdevAttributes *attribs = config_odev_allocate_attributes();
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- const char *value;
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+ const char *value, *str;
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attribs->path = XNFstrdup(path);
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attribs->syspath = XNFstrdup(syspath);
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@@ -482,8 +482,8 @@ config_udev_odev_setup_attribs(struct udev_device *udev_device, const char *path
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attribs->minor = minor;
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value = udev_device_get_property_value(udev_device, "ID_PATH");
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- if (value && !strncmp(value, "pci-", 4)) {
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- attribs->busid = XNFstrdup(value);
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+ if (value && (str = strstr(value, "pci-"))) {
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+ attribs->busid = XNFstrdup(str);
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attribs->busid[3] = ':';
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}
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--
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2.21.0
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