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From da30e9f2eee235ce11d47bb2e32f976b8c187e5d Mon Sep 17 00:00:00 2001
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From: Peter Jones <pjones@redhat.com>
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Date: Mon, 10 Sep 2018 15:00:03 -0400
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Subject: [PATCH 31/39] Fix another buggy fake acpi pci root driver
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In this case, the platform driver that creates the PCI(e) root device
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doesn't fill in its driver link, so we can't look up what driver is in
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use - but since it's the root, it *really* doesn't matter. And in
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general, we only really care if it's the last node in our path, because
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that'll be the controller for the boot device anyway.
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Signed-off-by: Peter Jones <pjones@redhat.com>
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---
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src/linux-pci.c | 24 +++++++++++++++++-------
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1 file changed, 17 insertions(+), 7 deletions(-)
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diff --git a/src/linux-pci.c b/src/linux-pci.c
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index e7c864b2d33..f63f5914d9f 100644
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--- a/src/linux-pci.c
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+++ b/src/linux-pci.c
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@@ -67,7 +67,9 @@ parse_pci(struct device *dev, const char *current, const char *root)
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uint8_t bus, device, function;
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struct pci_dev_info *pci_dev;
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unsigned int i = dev->n_pci_devs;
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+ struct stat statbuf;
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+ debug("devpart is \"%s\"", devpart);
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pos = 0;
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debug("searching for 0000:00:00.0/");
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rc = sscanf(devpart, "%hx:%hhx:%hhx.%hhx/%n",
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@@ -100,15 +102,23 @@ parse_pci(struct device *dev, const char *current, const char *root)
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return -1;
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}
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tmp[devpart - root] = '\0';
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- rc = sysfs_readlink(&linkbuf, "class/block/%s/driver", tmp);
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- if (rc < 0 || !linkbuf) {
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- efi_error("Could not find driver for pci device %s", tmp);
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- free(tmp);
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- return -1;
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+ rc = sysfs_stat(&statbuf, "class/block/%s/driver", tmp);
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+ if (rc < 0 && errno == ENOENT) {
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+ debug("No driver link for /sys/class/block/%s", tmp);
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+ debug("Assuming this is just a buggy platform core driver");
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+ dev->pci_dev[i].driverlink = NULL;
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+ } else {
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+ rc = sysfs_readlink(&linkbuf, "class/block/%s/driver", tmp);
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+ if (rc < 0 || !linkbuf) {
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+ efi_error("Could not find driver for pci device %s", tmp);
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+ free(tmp);
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+ return -1;
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+ } else {
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+ dev->pci_dev[i].driverlink = strdup(linkbuf);
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+ debug("driver:%s\n", linkbuf);
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+ }
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}
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free(tmp);
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- dev->pci_dev[i].driverlink = strdup(linkbuf);
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- debug("driver:%s\n", linkbuf);
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dev->n_pci_devs += 1;
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}
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--
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2.17.1
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