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author | Ben Hutchings <bhutchings@solarflare.com> | 2010-07-23 13:56:28 (GMT) |
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committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2010-07-30 16:41:39 (GMT) |
commit | 30da55242818a8ca08583188ebcbaccd283ad4d9 (patch) | |
tree | eaa39565cf37a2fbc739e1af02b569107aeee447 /drivers/pci/proc.c | |
parent | 911e1c9b05a8e3559a7aa89083930700a0b9e7ee (diff) | |
download | linux-30da55242818a8ca08583188ebcbaccd283ad4d9.tar.xz |
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/proc.c')
0 files changed, 0 insertions, 0 deletions