Ertuğrul Erata
50 lines
1.5 KiB
Diff
50 lines
1.5 KiB
Diff
Subject: mpt scsi modules for VMWare's emulated
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The attached patch is a workaround for a bug in VMWare's emulated LSI
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Fusion SCSI HBA. The emulated firmware returns zero for the maximum
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number of attached devices; the real firmware returns a positive
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number. Therefore, the kernel that boots and works fine on bare metal
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will fail on VMWare because this firmware value is handed to the SCSI
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midlayer, which then skips the entire bus scan.
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F7 bz 241935
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The patch below was submitted by Eric Moore of LSI to the linux-scsi
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mailing list:
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http://marc.info/?l=linux-scsi&m=117432237404247
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then immediately rejected by Christoph Hellwig, who prefers that
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VMWare fix their emulation instead.
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This patch is workaround.
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---
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drivers/message/fusion/mptbase.c | 15 +++++++++++++--
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1 file changed, 13 insertions(+), 2 deletions(-)
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--- a/drivers/message/fusion/mptbase.c
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+++ b/drivers/message/fusion/mptbase.c
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@@ -3051,8 +3051,19 @@ GetPortFacts(MPT_ADAPTER *ioc, int portn
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pfacts->MaxPersistentIDs = le16_to_cpu(pfacts->MaxPersistentIDs);
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pfacts->MaxLanBuckets = le16_to_cpu(pfacts->MaxLanBuckets);
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- max_id = (ioc->bus_type == SAS) ? pfacts->PortSCSIID :
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- pfacts->MaxDevices;
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+ switch (ioc->bus_type) {
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+ case SAS:
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+ max_id = pfacts->PortSCSIID;
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+ break;
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+ case FC:
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+ max_id = pfacts->MaxDevices;
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+ break;
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+ case SPI:
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+ default:
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+ max_id = MPT_MAX_SCSI_DEVICES;
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+ break;
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+ }
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+
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ioc->devices_per_bus = (max_id > 255) ? 256 : max_id;
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ioc->number_of_buses = (ioc->devices_per_bus < 256) ? 1 : max_id/256;
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