From: Punit Agrawal <punitagrawal@gmail.com>
To: linux-rockchip@lists.infradead.org, linux-pci@vger.kernel.org
Cc: Punit Agrawal <punitagrawal@gmail.com>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, alexandru.elisei@arm.com,
wqu@suse.com, robin.murphy@arm.com, pgwipeout@gmail.com,
ardb@kernel.org, briannorris@chromium.org,
shawn.lin@rock-chips.com, helgaas@kernel.org, robh+dt@kernel.org,
Vidya Sagar <vidyas@nvidia.com>
Subject: [PATCH v2 2/4] PCI: of: Relax the condition for warning about non-prefetchable memory aperture size
Date: Tue, 1 Jun 2021 07:10:55 +0900 [thread overview]
Message-ID: <20210531221057.3406958-3-punitagrawal@gmail.com> (raw)
In-Reply-To: <20210531221057.3406958-1-punitagrawal@gmail.com>
Commit fede8526cc48 ("PCI: of: Warn if non-prefetchable memory
aperture size is > 32-bit") introduced a warning for non-prefetchable
resources that need more than 32bits to resolve. It turns out that the
check is too restrictive and should be applicable to only resources
that are limited to host bridge windows that don't have the ability to
map 64-bit address space.
Relax the condition to only warn when the resource size requires >
32-bits and doesn't allow mapping to 64-bit addresses.
Link: https://lore.kernel.org/r/7a1e2ebc-f7d8-8431-d844-41a9c36a8911@arm.com
Signed-off-by: Punit Agrawal <punitagrawal@gmail.com>
Cc: Vidya Sagar <vidyas@nvidia.com>
---
drivers/pci/of.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/pci/of.c b/drivers/pci/of.c
index e2e64c5c55cb..c2a57c61f1d1 100644
--- a/drivers/pci/of.c
+++ b/drivers/pci/of.c
@@ -574,7 +574,8 @@ static int pci_parse_request_of_pci_ranges(struct device *dev,
res_valid |= !(res->flags & IORESOURCE_PREFETCH);
if (!(res->flags & IORESOURCE_PREFETCH))
- if (upper_32_bits(resource_size(res)))
+ if (!(res->flags & IORESOURCE_MEM_64) &&
+ upper_32_bits(resource_size(res)))
dev_warn(dev, "Memory resource size exceeds max for 32 bits\n");
break;
--
2.30.2
next prev parent reply other threads:[~2021-05-31 22:12 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-31 22:10 [PATCH v2 0/4] PCI: of: Improvements to handle 64-bit attribute for non-prefetchable ranges Punit Agrawal
2021-05-31 22:10 ` [PATCH v2 1/4] PCI: of: Override 64-bit flag for non-prefetchable memory below 4GB Punit Agrawal
2021-06-01 5:49 ` Ard Biesheuvel
2021-06-02 13:38 ` Punit Agrawal
2021-05-31 22:10 ` Punit Agrawal [this message]
2021-05-31 22:10 ` [PATCH v2 3/4] PCI: of: Refactor the check for non-prefetchable 32-bit window Punit Agrawal
2021-05-31 22:10 ` [PATCH v2 4/4] arm64: dts: rockchip: Update PCI host bridge window to 32-bit address memory Punit Agrawal
2021-06-01 12:53 ` [PATCH v2 0/4] PCI: of: Improvements to handle 64-bit attribute for non-prefetchable ranges Alexandru Elisei
2021-06-02 13:39 ` Punit Agrawal
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