From: Bjorn Helgaas Date: Tue, 27 Aug 2013 15:54:40 +0000 (-0600) Subject: PCI: Allow PCIe Capability link-related register access for switches X-Git-Tag: v3.12-rc1~177^2~1^2~3 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d3694d4fa3f44f6a295f8ab064937c8a1549d174;p=pandora-kernel.git PCI: Allow PCIe Capability link-related register access for switches Every PCIe device has a link, except Root Complex Integrated Endpoints and Root Complex Event Collectors. Previously we didn't give access to PCIe capability link-related registers for Upstream Ports, Downstream Ports, and Bridges, so attempts to read PCI_EXP_LNKCTL incorrectly returned zero. See PCIe spec r3.0, sec 7.8 and 1.3.2.3. Reference: http://lkml.kernel.org/r/979A8436335E3744ADCD3A9F2A2B68A52AD136BE@SJEXCHMB10.corp.ad.broadcom.com Reported-by: Yuval Mintz Signed-off-by: Bjorn Helgaas Reviewed-By: Jiang Liu --- Reading git-diff-tree failed