Little fix for usb packet handling on i/o cancelation. The
usb packet pointer (s->packet) is cleared at the wrong place:
The scsi request cancel handler does it. When a usb packet
is canceled the usb-storage emulation canceles the scsi request
if present. In most cases there is one, so usually s->packet
is cleared as needed even with the code sitting at the wrong
place.
If there is no scsi request in flight s->packet is not cleared
though. The usb-storage emulation will then try to complete an
usb packet which is not in flight any more and thereby trigger
an assert() in the usb core.
Fix this by clearing s->packet at the correct place, which is
the usb packet cancel header.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
It currently uses qerror_report(), but next commit will convert
the drive_del command to the QAPI and this requires using
error_set().
One particularity of qerror_report() is that it knows when it's
running on monitor context or command-line context and prints the
error message accordingly. error_set() doesn't do this, so we
have to be careful not to drop error messages.
qdev_unplug() has three kinds of usages:
1. It's called when hot adding a device fails, to undo anything
that has been done before hitting the error
2. It's called by function monitor functions like device_del(),
to unplug a device
3. It's used by xen_platform.c in a way that doesn't _seem_ to
be in monitor context
Only item 2 can print an error message to the user, this commit
maintains that.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
This fixes a broken endian assumption in an assertion in usb-msd.
Cc: Gerd Hoffman <kraxel@redhat.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reorganize usb source files. Create a new hw/usb/ directory and move
all usb source code to that place. Also make filenames a bit more
descriptive. Host adapters are prefixed with "hch-" now, usb device
emulations are prefixed with "dev-". Fixup paths Makefile and include
paths to make it compile. No code changes.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Gerd Hoffmann