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| author | Zhang Rui <rui.zhang@intel.com> | 2008-07-04 09:32:17 +0400 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2008-07-14 23:59:33 +0400 |
| commit | 24920c8a6358bf5532f1336b990b1c0fe2b599ee (patch) | |
| tree | 576c2dcbde9c76e13585ed37208640fbd3dba005 /drivers/s390/cio/ccwgroup.c | |
| parent | 1e9dbc9291738149577cc488fd441f061815e02e (diff) | |
| download | linux-24920c8a6358bf5532f1336b990b1c0fe2b599ee.tar.xz | |
AHCI: speed up resume
During resume, sleep 1 second to wait for the HBA reset
to finish is a waste of time.
According to the AHCI 1.2 spec,
We should poll the HOST_CTL register,
and return error if the host reset is not
finished within 1 second.
Test results show that the HBA reset can be done quickly(in usecs).
And this patch may save nearly 1 second during resume.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/s390/cio/ccwgroup.c')
0 files changed, 0 insertions, 0 deletions