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| author | Ben Hutchings <bhutchings@solarflare.com> | 2010-07-23 14:56:28 +0100 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2010-07-30 09:41:39 -0700 |
| commit | 30da55242818a8ca08583188ebcbaccd283ad4d9 (patch) | |
| tree | eaa39565cf37a2fbc739e1af02b569107aeee447 /arch/ia64/kernel | |
| parent | 911e1c9b05a8e3559a7aa89083930700a0b9e7ee (diff) | |
| download | kernel_samsung_crespo-30da55242818a8ca08583188ebcbaccd283ad4d9.zip kernel_samsung_crespo-30da55242818a8ca08583188ebcbaccd283ad4d9.tar.gz kernel_samsung_crespo-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 'arch/ia64/kernel')
| -rw-r--r-- | arch/ia64/kernel/msi_ia64.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/ia64/kernel/msi_ia64.c b/arch/ia64/kernel/msi_ia64.c index 6c89228..4a746ea 100644 --- a/arch/ia64/kernel/msi_ia64.c +++ b/arch/ia64/kernel/msi_ia64.c @@ -25,7 +25,7 @@ static int ia64_set_msi_irq_affinity(unsigned int irq, if (irq_prepare_move(irq, cpu)) return -1; - read_msi_msg(irq, &msg); + get_cached_msi_msg(irq, &msg); addr = msg.address_lo; addr &= MSI_ADDR_DEST_ID_MASK; |