linux-kernel - [PATCH] large pci adress space in pci/probe.c for linux-2.6.18

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Message-ID: <4561CBF9.CA21F786@ru.mvista.com>
Date:	Mon, 20 Nov 2006 18:38:33 +0300
From:	yadviga <yadviga@...mvista.com>
To:	Linux Kernel ML <linux-kernel@...r.kernel.org>
Subject: [PATCH] large pci adress space in pci/probe.c for linux-2.6.18

This is a request from Cisco to update pci address space for 64-bit mips
Cavium Octeon.

The size returned by a 4GB or greater sized BAR register returns zero
which made the algorithm in pci_read_bases() hit a continue instead of
continuing to read the upper 32-bits of the address space. I needed to
add the code to check if it was a 64-bit memory space by checking the
relevant lower bits, in which case the lower 32-bits of the size are
0xffffffff by the way they calculate size. As far as I can tell this has
still not been fixed in the latest release of Linux which is 2.6.18. I
guess no one has
encountered such a large BAR register yet.

View attachment "pci_probe_2.6.18.2.patch" of type "text/plain" (782 bytes)