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Message-Id: <20250505231817.2697367-80-sashal@kernel.org>
Date: Mon, 5 May 2025 19:17:43 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
stable@...r.kernel.org
Cc: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Xiaochun Lee <lixc17@...ovo.com>,
Sasha Levin <sashal@...nel.org>,
linux-pci@...r.kernel.org
Subject: [PATCH AUTOSEL 5.10 080/114] PCI: Fix old_size lower bound in calculate_iosize() too
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
[ Upstream commit ff61f380de5652e723168341480cc7adf1dd6213 ]
Commit 903534fa7d30 ("PCI: Fix resource double counting on remove &
rescan") fixed double counting of mem resources because of old_size being
applied too early.
Fix a similar counting bug on the io resource side.
Link: https://lore.kernel.org/r/20241216175632.4175-6-ilpo.jarvinen@linux.intel.com
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
Tested-by: Xiaochun Lee <lixc17@...ovo.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/pci/setup-bus.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index a159bfdfa2512..04c3ae8efc0f8 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -806,11 +806,9 @@ static resource_size_t calculate_iosize(resource_size_t size,
size = (size & 0xff) + ((size & ~0xffUL) << 2);
#endif
size = size + size1;
- if (size < old_size)
- size = old_size;
- size = ALIGN(max(size, add_size) + children_add_size, align);
- return size;
+ size = max(size, add_size) + children_add_size;
+ return ALIGN(max(size, old_size), align);
}
static resource_size_t calculate_memsize(resource_size_t size,
--
2.39.5
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