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Commit faf321b0 authored by Benjamin Rood's avatar Benjamin Rood Committed by Martin K. Petersen
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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: default avatarBenjamin Rood <brood@attotech.com>
Reviewed-by: default avatarJack Wang <jinpu.wang@profitbricks.com>
Reviewed-by: default avatarHannes Reinecke <hare@suse.de>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent c5614df7

drivers/scsi/pm8001/pm80xx_hwi.c

+2 −0
Original line number Diff line number Diff line
@@ -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);