Searched hist:e1f7de0cdd68d246d7008241cd9e443a54f880a8 (Results 1 – 3 of 3) sorted by relevance
| /openbmc/linux/drivers/scsi/ |
| H A D | hpsa_cmd.h | diff e1f7de0cdd68d246d7008241cd9e443a54f880a8 Tue Feb 18 13:55:17 CST 2014 Matt Gates <matthew.gates@hp.com> [SCSI] hpsa: add support for 'fastpath' i/o
For certain i/o's to certain devices (unmasked physical disks) we
can bypass the RAID stack firmware and do the i/o to the device
directly and it will be faster.
Signed-off-by: Matt Gates <matthew.gates@hp.com>
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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| H A D | hpsa.h | diff e1f7de0cdd68d246d7008241cd9e443a54f880a8 Tue Feb 18 13:55:17 CST 2014 Matt Gates <matthew.gates@hp.com> [SCSI] hpsa: add support for 'fastpath' i/o
For certain i/o's to certain devices (unmasked physical disks) we
can bypass the RAID stack firmware and do the i/o to the device
directly and it will be faster.
Signed-off-by: Matt Gates <matthew.gates@hp.com>
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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| H A D | hpsa.c | diff 67c99a72e3006e4276e91d7282a3d6734fc77a0b Mon Apr 14 14:01:09 CDT 2014 scameron@beardog.cce.hp.com <scameron@beardog.cce.hp.com> [SCSI] hpsa: fix NULL dereference in hpsa_put_ctlr_into_performant_mode()
Initialize local variable trans_support before it is used rather
than after. It is supposed to contain the value of a register on the
controller containing bits that describe which transport modes the
controller supports (e.g. "performant", "ioaccel1", "ioaccel2"). A
NULL pointer dereference will almost certainly occur if trans_support
is not initialized at the right point. If for example the uninitialized
trans_support value does not have the bit set for ioaccel2 support when it
should be, then ioaccel2_alloc_cmds_and_bft() will not get called as it
should be and the h->ioaccel2_blockFetchTable array will remain NULL
instead of being allocated. Too late, trans_support finally gets
initialized with the correct value with ioaccel2 mode bit set,
which later causes calc_bucket_map() to be called to fill in
h->ioaccel2_blockFetchTable[]. However h->ioaccel2_blockFetchTable
is NULL because it didn't get allocated because earlier trans_support
wasn't initialized at the right point.
Fixes: e1f7de0cdd68d246d7008241cd9e443a54f880a8
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Reported-by: Baoquan He <bhe@redhat.com>
Tested-by: Baoquan He <bhe@redhat.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff e1f7de0cdd68d246d7008241cd9e443a54f880a8 Tue Feb 18 13:55:17 CST 2014 Matt Gates <matthew.gates@hp.com> [SCSI] hpsa: add support for 'fastpath' i/o
For certain i/o's to certain devices (unmasked physical disks) we
can bypass the RAID stack firmware and do the i/o to the device
directly and it will be faster.
Signed-off-by: Matt Gates <matthew.gates@hp.com>
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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