diff options
| author | Salyzyn, Mark <Mark_Salyzyn@adaptec.com> | 2008-01-08 12:01:07 -0800 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-01-23 11:29:18 -0600 |
| commit | 95e852e1ef165560e85d3012127068c8f08b19a1 (patch) | |
| tree | 42963d0880b10f34c888ad55890b679ad8a5ccc2 /drivers/scsi/aacraid/commsup.c | |
| parent | 9b161a4d3e83518323ce13822e55de70c630aa65 (diff) | |
[SCSI] aacraid: add parameter to control FUA and SYNCHRONIZE_CACHE policy
aacraid.cache parameter, Disable Queue Flush commands:
bit 0 - Disable FUA in WRITE SCSI commands
bit 1 - Disable SYNCHRONIZE_CACHE SCSI command
bit 2 - Disable only if Battery not protecting adapter supplied Cache
e.g.: aacraid.cache=7 will disable the FUA and SYNCHRONIZE_CACHE
commands if the adapter has reported that it's cache is battery backed
up.
This parameter permits experimentation with tradeoffs between
performance and caching policy.
Signed-off-by: Mark Salyzyn <aacraid@adaptec.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi/aacraid/commsup.c')
| -rw-r--r-- | drivers/scsi/aacraid/commsup.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/scsi/aacraid/commsup.c b/drivers/scsi/aacraid/commsup.c index 53d415e812ee..81cdac166d4b 100644 --- a/drivers/scsi/aacraid/commsup.c +++ b/drivers/scsi/aacraid/commsup.c @@ -849,6 +849,10 @@ static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr) case AifCmdEventNotify: switch (le32_to_cpu(((__le32 *)aifcmd->data)[0])) { + case AifEnBatteryEvent: + dev->cache_protected = + (((__le32 *)aifcmd->data)[1] == cpu_to_le32(3)); + break; /* * Add an Array. */ |