From c9c75143a5962c4c26d2f2c99b7a6e06f421f5e1 Mon Sep 17 00:00:00 2001 From: Yongji Xie Date: Mon, 10 Apr 2017 19:58:11 +0800 Subject: [PATCH] PCI: Fix calculation of bridge window's size and alignment In case that one device's alignment is greater than its size, we may get an incorrect size and alignment for its bus's memory window in pbus_size_mem(). Fix this case. Signed-off-by: Yongji Xie Signed-off-by: Bjorn Helgaas --- drivers/pci/setup-bus.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c index cb389277df41..958da7db9033 100644 --- a/drivers/pci/setup-bus.c +++ b/drivers/pci/setup-bus.c @@ -1066,10 +1066,10 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask, r->flags = 0; continue; } - size += r_size; + size += max(r_size, align); /* Exclude ranges with size > align from calculation of the alignment. */ - if (r_size == align) + if (r_size <= align) aligns[order] += align; if (order > max_order) max_order = order;