Subject: [PATCH v10 1/4] PCI: A fix for caculating bridge window's size and alignment

From: Yongji Xie <[email-masked]>
Date: Mon, 10 Apr 2017 19:58:11 +0800

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(). This patch fixes this case.

Signed-off-by: Yongji Xie <[email-masked]>
---
 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 cb389277..958da7d 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;
-- 
1.7.9.5