While looking at usb/95173 I noticed what appears to be a bug in
umass_scsi_transform(). Specifically, a TEST_UNIT_READY command will
have the FORCE_SHORT_INQUIRY quirk logic applied to it due to the switch
statement fall-through. Unless these two commands are equivalent in
some way, it would seem that you would only want to apply the
FORCE_SHORT_INQUIRY quirk to INQUIRY commands.
I'm attaching a possible fix for the problem, but I cannot test it as I
don't have any devices requiring these quirks.
Anyway, I just thought I would mention it. I'm not that familiar with
the code so its certainly possible I am off base here.
Thanks.
- Ben
--- /usr/src/sys/dev/usb/umass.c 2007-12-02 18:47:00.466926284 +0000
+++ umass.c 2007-12-02 22:07:44.896977086 +0000
@@ -3297,7 +3297,7 @@
(*rcmd)[4] = SSS_START;
return 1;
}
- /* fallthrough */
+ break;
case INQUIRY:
/* some drives wedge when asked for full inquiry
information. */
if (sc->quirks & FORCE_SHORT_INQUIRY) {
@@ -3306,12 +3306,14 @@
(*rcmd)[4] = SHORT_INQUIRY_LENGTH;
return 1;
}
- /* fallthrough */
+ break;
default:
- *rcmd = cmd; /* We don't need to copy it */
- *rcmdlen = cmdlen;
+ break;
}
+ *rcmd = cmd; /* We don't need to copy it */
+ *rcmdlen = cmdlen;
+
return 1;
}
/* RBC specific functions */
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