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authorBenjamin Rood <benjaminjrood@gmail.com>2015-10-30 17:53:29 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2015-11-03 07:39:35 +0300
commitfaf321b0b7fe3bfcb00ceb5192ecce9d6257dc06 (patch)
tree6759d256e8194357f1362756cf46dbe4259883d7 /drivers/scsi/pm8001
parentc5614df7ffa74d2fcb591eb4e9008ca38f0bc8c1 (diff)
downloadlinux-faf321b0b7fe3bfcb00ceb5192ecce9d6257dc06.tar.xz
pm80xx: do not examine registers for iButton feature if ATTO adapter
ATTO adapters do not support this feature. If the firmware fails to be ready, it should not check the examined registers in order to examine the state of the feature in order to prevent undefined behavior. Signed-off-by: Benjamin Rood <brood@attotech.com> Reviewed-by: Jack Wang <jinpu.wang@profitbricks.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/pm8001')
-rw-r--r--drivers/scsi/pm8001/pm80xx_hwi.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/scsi/pm8001/pm80xx_hwi.c b/drivers/scsi/pm8001/pm80xx_hwi.c
index 29c548be6438..eb4fee61df72 100644
--- a/drivers/scsi/pm8001/pm80xx_hwi.c
+++ b/drivers/scsi/pm8001/pm80xx_hwi.c
@@ -1267,6 +1267,8 @@ pm80xx_chip_soft_rst(struct pm8001_hba_info *pm8001_ha)
/* check iButton feature support for motherboard controller */
if (pm8001_ha->pdev->subsystem_vendor !=
PCI_VENDOR_ID_ADAPTEC2 &&
+ pm8001_ha->pdev->subsystem_vendor !=
+ PCI_VENDOR_ID_ATTO &&
pm8001_ha->pdev->subsystem_vendor != 0) {
ibutton0 = pm8001_cr32(pm8001_ha, 0,
MSGU_HOST_SCRATCH_PAD_6);