* Amit Shah [2011-04-07 03:53]:
> We restrict the commands that a guest can send us after a cdrom change
> event. The current list includes REQUEST_SENSE and INQUIRY commands.
> Guests can also issue TEST_UNIT_READY to inquire for the status, so
> allow this command as well.
>
> This also gets rid of one cause of the HSM violation errors in Linux
> guests. Those errors came up because we had the UNIT_ATTENTION event
> pending and we replied with an error message to a command that should be
> allowed in such a condition. The guest then did a soft reset to get to
> a sane state.
>
> Signed-off-by: Amit Shah
> ---
> hw/ide/core.c |9 +
> 1 files changed, 5 insertions(+), 4 deletions(-)
>
> diff --git a/hw/ide/core.c b/hw/ide/core.c
> index 007a4ee..d55d804 100644
> --- a/hw/ide/core.c
> +++ b/hw/ide/core.c
> @@ -1105,10 +1105,11 @@ static void ide_atapi_cmd(IDEState *s)
> /* If there's a UNIT_ATTENTION condition pending, only
> REQUEST_SENSE and INQUIRY commands are allowed to complete. */
Wasn't this comment going to get updated to be more generic (ie more
than just the 3 commands below may be needed?)
> if (s->sense_key == SENSE_UNIT_ATTENTION &&
> - s->io_buffer[0] != GPCMD_REQUEST_SENSE &&
> - s->io_buffer[0] != GPCMD_INQUIRY) {
> - ide_atapi_cmd_check_status(s);
> - return;
> +s->io_buffer[0] != GPCMD_REQUEST_SENSE &&
> +s->io_buffer[0] != GPCMD_INQUIRY &&
> +s->io_buffer[0] != GPCMD_TEST_UNIT_READY) {
> +ide_atapi_cmd_check_status(s);
> +return;
> }
> switch(s->io_buffer[0]) {
> case GPCMD_TEST_UNIT_READY:
> --
> 1.7.4
>
--
Ryan Harper
Software Engineer; Linux Technology Center
IBM Corp., Austin, Tx
ry...@us.ibm.com
