esp: ensure cmdfifo is not empty and current_dev is non-NULL
commit99545751734035b76bd372c4e7215bb337428d89
authorMark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Wed, 7 Apr 2021 19:57:55 +0000 (7 20:57 +0100)
committerMark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Mon, 12 Apr 2021 21:35:53 +0000 (12 22:35 +0100)
treea585793c32cbb55c919cdc607eadf69fda9e6daf
parent7b320a8e67a534925048cbabfa51431e0349dafd
esp: ensure cmdfifo is not empty and current_dev is non-NULL

When about to execute a SCSI command, ensure that cmdfifo is not empty and
current_dev is non-NULL. This can happen if the guest tries to execute a TI
(Transfer Information) command without issuing one of the select commands
first.

Buglink: https://bugs.launchpad.net/qemu/+bug/1910723
Buglink: https://bugs.launchpad.net/qemu/+bug/1909247
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Alexander Bulekov <alxndr@bu.edu>
Message-Id: <20210407195801.685-7-mark.cave-ayland@ilande.co.uk>
hw/scsi/esp.c