From: Ivan Kokshaysky Date: Wed, 6 Jul 2005 23:07:56 +0000 (+0400) Subject: [PATCH] yet another fix for setup-bus.c/x86 merge X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=960b8466548c9bc6f718b5f470c1a58000fab09d;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git [PATCH] yet another fix for setup-bus.c/x86 merge There is a slight disagreement between setup-bus.c code and traditional x86 PCI setup wrt which recourses are invalid vs resources that are free for further allocations. In particular, in the setup-bus.c, if we failed to allocate some resource, we nullify "start" and "flags" fields, but *not* the "end" one. But x86 pcibios_enable_resources() does the following check: if (!r->start && r->end) { printk(KERN_ERR "PCI: Device %s not available because of resource collisions\n", pci_name(dev)); return -EINVAL; which means that the device owning the offending resource cannot be enabled. In particular, this breaks cardbus behind the normal decode p2p bridge - the cardbus code from setup-bus.c requests rather large IO and MEM windows, and if it fails, the socket is completely unavailable. Which is wrong, as the yenta code is capable to allocate smaller windows. Signed-off-by: Ivan Kokshaysky Signed-off-by: Linus Torvalds --- diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c index c1bdfb424658..9fe48f712be9 100644 --- a/drivers/pci/setup-bus.c +++ b/drivers/pci/setup-bus.c @@ -74,6 +74,7 @@ pbus_assign_resources_sorted(struct pci_bus *bus) idx = res - &list->dev->resource[0]; if (pci_assign_resource(list->dev, idx)) { res->start = 0; + res->end = 0; res->flags = 0; } tmp = list;