Re: [PATCH 1/5] libsas: disable scanning lun > 0 on ata devices

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On 09/20/2011 06:10 PM, Dan Williams wrote:
Currently mvsas and pm8001 have custom ->slave_alloc implementations to
achieve this.  Uplevel it for all libsas drivers as isci encounters problems
with atapi devices when scanning past lun0.

Just do what Darrick suggested [1], and limit the scan for ata devices.

[1] http://marc.info/?l=linux-scsi&m=116604101119861&w=2

Cc: Darrick Wong<djwong@xxxxxxxxxx>
Cc: Xiangliang Yu<yuxiangl@xxxxxxxxxxx>
Cc: Jack Wang<jack_wang@xxxxxxxxx>
Cc: Mark Salyzyn<msalyzyn@xxxxxxxxxxxxxx>
Cc: Luben Tuikov<ltuikov@xxxxxxxxx>
Signed-off-by: Dan Williams<dan.j.williams@xxxxxxxxx>
---
  drivers/scsi/scsi_transport_sas.c |   10 ++++++++--
  1 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/scsi_transport_sas.c b/drivers/scsi/scsi_transport_sas.c
index c6fcf76..9d9330a 100644
--- a/drivers/scsi/scsi_transport_sas.c
+++ b/drivers/scsi/scsi_transport_sas.c
@@ -1545,8 +1545,14 @@ int sas_rphy_add(struct sas_rphy *rphy)

  	if (identify->device_type == SAS_END_DEVICE&&
  	rphy->scsi_target_id != -1) {
-		scsi_scan_target(&rphy->dev, 0,
-				rphy->scsi_target_id, SCAN_WILD_CARD, 0);
+		int lun;
+
+		if (identify->target_port_protocols&  SAS_PROTOCOL_SSP)
+			lun = SCAN_WILD_CARD;
+		else
+			lun = 0;
+
+		scsi_scan_target(&rphy->dev, 0, rphy->scsi_target_id, lun, 0);

Acked-by: Jeff Garzik <jgarzik@xxxxxxxxxx>



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