From: Petr Vandrovec <vandrove@vc.cvut.cz>
Subject: Installation in VMware-Server fails
References: 263883

Installation in VMware-Server fails as the VMware mpt emulation is
broken; it does not (or wrongly) set the MaxDevices field to '0'.

Signed-off-by: Hannes Reinecke <hare@suse.de>

diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c
index 97471af..b3eb367 100644
--- a/drivers/message/fusion/mptbase.c
+++ b/drivers/message/fusion/mptbase.c
@@ -2567,6 +2567,16 @@ GetPortFacts(MPT_ADAPTER *ioc, int portn
 	pfacts->IOCStatus = le16_to_cpu(pfacts->IOCStatus);
 	pfacts->IOCLogInfo = le32_to_cpu(pfacts->IOCLogInfo);
 	pfacts->MaxDevices = le16_to_cpu(pfacts->MaxDevices);
+        /*
+	 * VMware emulation is broken, its PortFact's MaxDevices reports value
+	 * programmed by IOC Init, so if IOC Init is programmed to 256 (which
+	 * is 0, as that field is only 8 bit), it reports back 0 in port facts,
+	 * instead of 256... And unfortunately using 256 triggers another bug
+	 * in the code (parallel SCSI can have only 16 devices).
+	 */
+	if (pfacts->MaxDevices == 0) {
+	    pfacts->MaxDevices = 16;
+	}
 	pfacts->PortSCSIID = le16_to_cpu(pfacts->PortSCSIID);
 	pfacts->ProtocolFlags = le16_to_cpu(pfacts->ProtocolFlags);
 	pfacts->MaxPostedCmdBuffers = le16_to_cpu(pfacts->MaxPostedCmdBuffers);
@@ -2574,7 +2584,7 @@ GetPortFacts(MPT_ADAPTER *ioc, int portn
 	pfacts->MaxLanBuckets = le16_to_cpu(pfacts->MaxLanBuckets);
 
 	max_id = (ioc->bus_type == SAS) ? pfacts->PortSCSIID :
-	    pfacts->MaxDevices;
+		pfacts->MaxDevices;
 	ioc->devices_per_bus = (max_id > 255) ? 256 : max_id;
 	ioc->number_of_buses = (ioc->devices_per_bus < 256) ? 1 : max_id/256;