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Subject: [Bug 211716] [PATCH] USB Driver didn't get the right size
Date: Wed, 10 Aug 2016 07:10:45 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D211716

            Bug ID: 211716
           Summary: [PATCH] USB Driver didn't get the right size
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Keywords: patch
          Severity: Affects Only Me
          Priority: ---
         Component: usb
          Assignee: freebsd-usb@FreeBSD.org
          Reporter: howard0su@gmail.com
          Keywords: patch

One I-O Data USB Flash Disk cannot get the right size. the dmesg shows
umass0: <I-O DATA USB Flash Disk, class 0/0, rev 2.10/0.01, addr 2> on usbu=
s7
umass0:  SCSI over Bulk-Only; quirks =3D 0x8100
umass0:6:0: Attached to scbus6
da0 at umass-sim0 bus 0 scbus6 target 0 lun 0
da0: <I-O DATA USB Flash Disk 1.00> Removable Direct Access SPC-4 SCSI devi=
ce
da0: Serial Number 137161312223005B
da0: 40.000MB/s transfers
da0: 0MB (1 512 byte sectors)
da0: quirks=3D0x2<NO_6_BYTE>

The following patch solves the problem:
diff --git a/sys/cam/scsi/scsi_da.c b/sys/cam/scsi/scsi_da.c
index b869467..0614b28 100644
--- a/sys/cam/scsi/scsi_da.c
+++ b/sys/cam/scsi/scsi_da.c
@@ -1295,6 +1295,13 @@ static struct da_quirk_entry da_quirk_table[] =3D
                { T_DIRECT, SIP_MEDIA_REMOVABLE, "MX", "MXUB3*", "*"},
                /*quirks*/DA_Q_NO_RC16
        },
+       {
+               /*
+                * I-O Data USB Flash Disk
+                */
+               { T_DIRECT, SIP_MEDIA_REMOVABLE, "I-O DATA", "USB Flash Dis=
k*",
"*"},
+               /*quirks*/DA_Q_NO_RC16
+       },
 };

 static disk_strategy_t dastrategy;

After the patch the size is correctly detected.

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