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authorBen Hutchings <bhutchings@solarflare.com>2010-07-23 14:56:28 +0100
committerJesse Barnes <jbarnes@virtuousgeek.org>2010-07-30 09:41:39 -0700
commit30da55242818a8ca08583188ebcbaccd283ad4d9 (patch)
treeeaa39565cf37a2fbc739e1af02b569107aeee447 /drivers/pci/quirks.c
parent911e1c9b05a8e3559a7aa89083930700a0b9e7ee (diff)
downloadlinux-30da55242818a8ca08583188ebcbaccd283ad4d9.tar.bz2
PCI: MSI: Restore read_msi_msg_desc(); add get_cached_msi_msg_desc()
commit 2ca1af9aa3285c6a5f103ed31ad09f7399fc65d7 "PCI: MSI: Remove unsafe and unnecessary hardware access" changed read_msi_msg_desc() to return the last MSI message written instead of reading it from the device, since it may be called while the device is in a reduced power state. However, the pSeries platform code really does need to read messages from the device, since they are initially written by firmware. Therefore: - Restore the previous behaviour of read_msi_msg_desc() - Add new functions get_cached_msi_msg{,_desc}() which return the last MSI message written - Use the new functions where appropriate Acked-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci/quirks.c')
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