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  1. 12 4月, 2010 6 次提交
    • K
      [SCSI] mpt2sas: Send default descriptor for RAID pass through in mpt2ctl · ebda4d38
      由 Kashyap, Desai 提交于 
      RAID_SCSI_IO_PASSTHROUGH: Driver needs to be sending the default
descriptor for RAID Passthru, currently its sending SCSI_IO descriptor.
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
      ebda4d38
    • K
      [SCSI] mpt2sas: sanity added to remove duplicate port from topology · 38c29114
      由 Kashyap, Desai 提交于 
      There are few special cases which needs to be handled deleting old port.

CASE1: In topology you need cascaded expanders. Through sysfs just make sure
topology is up. Erase the manufacturing image of the cascaded expander and
reset the board. In some cases Adapter will receive Exapnder Add event
before expander delete. In such a case, driver needs to delete duplicate
port before adding new port.

CASE2: Enable Device Missing delay of HBA through lsiutils. If expander or
end device is hotswapped with different device before DMD timer expires,
driver will get device add for new device first and then device deletion
event for the original devices will arrive later at DMD timer expires. In
this case also driver need to delete duplicate port before adding port for
new device.

Added new function which will make sure when new port is
added, that its not claiming the same phy resources already in use by
another port. If it does, then it will delete the other port before adding
the new port.
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
      38c29114
    • D
      [SCSI] scsi_debug: add max_queue + no_uld parameters · 78d4e5a0
      由 Douglas Gilbert 提交于 
      While testing the midlevel q_at_head and q_at_tail
patch for sg and the block SG_IO ioctl I found it
useful to reduce the queuing within the scsi_debug
driver. The reason is that the midlevel queue only
comes into play when the corresponding LLD queue
is full.

It is also useful when testing to be confident that
your program is the only thing issuing commands
to the (virtual) scsi_debug device. The no_uld=1
parameter will stop a scsi_debug virtual disk
appearing as /dev/sd* .

Changelog:
   - add max_queue parameter to reduce the number
     of queued commands the driver will accept.
     This parameter can be changed after the driver
     is loaded.
   - add no_uld parameter that restricts scsi_debug's
     virtual devices to the sg and bsg drivers
   - correct stale url
Signed-off-by: NDouglas Gilbert <dgilbert@interlog.com>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
      78d4e5a0
    • J
      [SCSI] sd: retry read_capacity on UNIT_ATTENTION · 3233ac19
      由 James Bottomley 提交于 
      Hazard testing uncovered yet another bug in sd. Under heavy reset
activity the retry counter might be exhausted and the command will be
returned with sense UNIT_ATTENTION/0x29/00 (POWER ON, RESET, OR BUS
DEVICE RESET OCCURRED). In those cases we should just increase the
retry counter again, retrying one more to clear up this Unit Attention
state.

[jejb: update to work with RC16 devices and not to loop endlessly]
Signed-off-by: NHannes Reinecke <hare@suse.de>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
      3233ac19
    • K
      [SCSI] mpt2sas : IOs needs to be pause until handles are refreshed for all device after recovery · 14695853
      由 Kashyap, Desai 提交于 
      After Host Reset firmware will have new list of device handles for the target.
Device handle refresh in driver is part of Rescan topology logic.
(See functions like *_search_responding_*). This needs to be done from Host
Reset context before making shost_recovery to 0. Currently it is done in
Firwmare event context, which may leads IO to a wrong device.

Now handler refresh is moved to HBA reset context.
Apart from this, Now driver will stop IOs for all device setting deleted
flag to 1 at the time of HBA Reset through _scsih_prep_device_scan.
It will only unblock devices, if devices has been found as part of RESCAN.
This way it will make more safe IO blocking at the time of HBA reset at
mpt2sas driver layer.
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
      14695853
    • H
      [SCSI] sd: quiet spurious error messages in READ_CAPACITY(16) · f87146bb
      由 Hannes Reinecke 提交于 
      sd always tries to submit a READ_CAPACITY(16) CDB,
regardless whether the host actually supports it.
queuecommand() will then return DID_ABORT, which is
not qualified enough to detect the true cause here.
So better check in sd_try_rc16 first if the cdblen
is supported.
Signed-off-by: NHannes Reinecke <hare@suse.de>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>
      f87146bb
  3. 11 4月, 2010 34 次提交