tree 632319f6acf459f66a97144a2a41efeb11e7eb77
parent 324c8809897c8c53ad05c3a7147d272f1711cd5e
author Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> 1617825480 +0100
committer Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> 1618263353 +0100

esp: ensure that do_cmd is set to zero before submitting an ESP select command

When a CDB has been received and is about to be submitted to the SCSI layer
via one of the ESP select commands, ensure that do_cmd is set to zero before
executing the command.

Otherwise a guest executing 2 valid CDBs in quick sequence can invoke the SCSI
.transfer_data callback again before do_cmd is set to zero by the callback
function triggering an assert at the start of esp_transfer_data().

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210407195801.685-12-mark.cave-ayland@ilande.co.uk>