From: Yinghai Lu Date: Fri, 24 Feb 2012 03:23:29 +0000 (-0800) Subject: PCI: Retry on IORESOURCE_IO type allocations X-Git-Tag: v3.4-rc1~114^2~32 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0c5be0cb0edfe3b5c4b62eac68aa2aa15ec681af;p=pandora-kernel.git PCI: Retry on IORESOURCE_IO type allocations When enabling pci reallocation for a pci bridge, we clear the small size in in bridge and re-assign with requested + optional size for first several tries, but Ram mention could have problem with one case: https://bugzilla.kernel.org/show_bug.cgi?id=15960 After checking the booting log in https://lkml.org/lkml/2010/4/19/44 [regression, bisected] Xonar DX invalid PCI I/O range since 977d17bb174 We should not stop too early for io ports. Apr 19 10:19:38 [kernel] pci 0000:04:00.0: BAR 7: can't assign io (size 0x4000) Apr 19 10:19:38 [kernel] pci 0000:05:01.0: BAR 8: assigned [mem 0x80400000-0x805fffff] Apr 19 10:19:38 [kernel] pci 0000:05:01.0: BAR 7: can't assign io (size 0x2000) Apr 19 10:19:38 [kernel] pci 0000:05:02.0: BAR 7: can't assign io (size 0x1000) Apr 19 10:19:38 [kernel] pci 0000:05:03.0: BAR 7: can't assign io (size 0x1000) Apr 19 10:19:38 [kernel] pci 0000:08:00.0: BAR 7: can't assign io (size 0x1000) Apr 19 10:19:38 [kernel] pci 0000:09:04.0: BAR 0: can't assign io (size 0x100) and clear 00:1c.0 to retry again. This patch removes IORESOUCE_IO checking, and tries one more time. It gives us a chance to get an allocation for the 00:1c.0 io port range because the range from 0x4000 to 0x8000 will be freed and we can use it. Signed-off-by: Yinghai Lu Signed-off-by: Jesse Barnes --- Reading git-diff-tree failed