Re: [Qemu-devel] [patch] fix scsi-generic

[Kevin Wolf]

Am 07.08.2010 02:55, schrieb adq:
> Hi, I've been tracking down why scsi generic devices (using SG_IO)
> don't work any more. After adding debug, I can see that it actually
> submits the scsi CDB in hw/scsi-generic.c/execute_command(), but that
> the hw/scsi-generic.c/scsi_read_complete() callback is never called.
> 
> This is because these are done with ioctls, and the posix async ioctl
> code is, I think, broken right now. Some more debugging, led me to
> posix-aio-compat.c/posix_aio_process_queue():
> 
>             if (acb->async_context_id != async_context_id) {
> 
> The async_context_ids don't match, so the request is never handled.
> This is because the acb->async_context_id field is not initialised in
> posix-aio-compat.c/paio_ioctl() (compare with
> posix-aio-compat.c/paio_submit()). The attached patch adds the missing
> line in.
> 
> This seems to fix the problem. Of course, /now/ I'm getting other
> weird problems (as I'm trying to see if I can get slysoft anydvd
> working in a KVM winXP vm), but they need further investigation and
> likely other fixes.
> 
> Please forgive me if I'm mistaken in this, I've only just started
> looking at the qemu code.

The patch looks correct to me.

Please use git format-patch to generate the patch, so that it contains a
decent commit message and I can apply it with git am. Also, please don't
forget the Signed-off-by line, otherwise we can't accept it.

Kevin