Re: [PATCH v6 1/5] PCI: Handle IORESOURCE_PCI_FIXED when sizing resources.
From: David Daney <hidden>
Date: 2015-10-29 20:57:22
Also in:
linux-pci, lkml
Bjorn, A small snafu... On 10/20/2015 04:04 PM, David Daney wrote:
quoted hunk ↗ jump to hunk
From: David Daney <david.daney-YGCgFSpz5w/QT0dZR+AlfA@public.gmane.org> The new Enhanced Allocation (EA) capability support (patches to follow) creates resources with the IORESOURCE_PCI_FIXED set. Since these resources cannot be relocated or resized, their alignment is not really defined, and it is therefore not specified. This causes a problem in pbus_size_mem() where resources with unspecified alignment are disabled. So, in pbus_size_mem() skip IORESOURCE_PCI_FIXED resources, instead of disabling them. Acked-by: Sean O. Stalley <redacted> Signed-off-by: David Daney <david.daney-YGCgFSpz5w/QT0dZR+AlfA@public.gmane.org> --- drivers/pci/setup-bus.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c index 508cc56..4dfef10 100644 --- a/drivers/pci/setup-bus.c +++ b/drivers/pci/setup-bus.c@@ -1037,9 +1037,10 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask, struct resource *r = &dev->resource[i]; resource_size_t r_size; - if (r->parent || ((r->flags & mask) != type && - (r->flags & mask) != type2 && - (r->flags & mask) != type3)) + if (r->parent || (r->flags | IORESOURCE_PCI_FIXED) ||
Should be: r->flags & IORESOURCE_PCI_FIXED With the erroneous '|', sizing of bridge resources can break. Q: How to fix this. A) Replace this patch entirely? B) A patch on top of this one?
+ ((r->flags & mask) != type && + (r->flags & mask) != type2 && + (r->flags & mask) != type3)) continue; r_size = resource_size(r); #ifdef CONFIG_PCI_IOV