linux-kernel - resource sanity check, mapping multiple BARs

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Message-ID: <a19ca757-195d-c2d3-c1b8-529c1028a37f@gmail.com>
Date:   Mon, 6 Dec 2021 21:56:55 +0100
From:   Ferry Toth <fntoth@...il.com>
To:     linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: resource sanity check, mapping multiple BARs

Hi,

Between v5.15 and v5.16-rc the following (unrelated?) errors are 
appearing in kernel.log:

resource sanity check: requesting [mem 0xff200000-0xff3fffff], which 
spans more than 0000:00:0e.0 [mem 0xff298000-0xff29bfff]
caller devm_ioremap+0x45/0x80 mapping multiple BARs
pmd_set_huge: Cannot satisfy [mem 0x05e00000-0x06000000] with a 
huge-page mapping due to MTRR override.

This is on Intel Edison (Merrifield), which has (from lspci):

00:0e.0 System peripheral: Intel Corporation Device 119b (rev 01)
     Flags: fast devsel, IRQ 25
     Memory at ff298000 (32-bit, non-prefetchable) [size=16K]
     Memory at ff2a2000 (32-bit, non-prefetchable) [size=4K]
     Capabilities: [b0] Power Management version 3
     Capabilities: [b8] Vendor Specific Information: Len=08 <?>
     Capabilities: [c0] PCI-X non-bridge device
     Capabilities: [100] Vendor Specific Information: ID=0000 Rev=0 
Len=024 <?>

Any suggestions on the cause of this would be welcome.

Ferry