libmultipath issue

[James Shoemaker <james@xxxxxxxxxx>]

   I have a piece of hardware, a 16 bay storagetek  optically connected SAN to
be specific, that returns empty string for Device id.

   I did the following patch to resolve the issue, it basically allows empty
string for vendor and product, I couldn't find anywhere that had an issue with
it..

diff --git a/libmultipath/discovery.c b/libmultipath/discovery.c
index 663c8ea..92d0e49 100644
--- a/libmultipath/discovery.c
+++ b/libmultipath/discovery.c
@@ -1149,12 +1149,12 @@ scsi_sysfs_pathinfo (struct path * pp, vector hwtable)
        if (!attr_path || pp->sg_id.host_no == -1)
                return 1;

-       if (sysfs_get_vendor(parent, pp->vendor_id, SCSI_VENDOR_SIZE) <= 0)
+       if (sysfs_get_vendor(parent, pp->vendor_id, SCSI_VENDOR_SIZE) < 0)
                return 1;

        condlog(3, "%s: vendor = %s", pp->dev, pp->vendor_id);

-       if (sysfs_get_model(parent, pp->product_id, SCSI_PRODUCT_SIZE) <= 0)
+       if (sysfs_get_model(parent, pp->product_id, SCSI_PRODUCT_SIZE) < 0)
                return 1;

        condlog(3, "%s: product = %s", pp->dev, pp->product_id);

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