Right now, I/O will fail as soon as a unit attention condition is detected on a unit with removable media. However, this is not always necessary. There are some cases (such as "Capacity data has changed") where no particular action is needed. On the other hand, all problematic cases have to report at least one of "No medium" and/or a "Medium may have changed", so restrict our attention to those. This patch fixes resizing a removable medium with virtio-scsi. Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx> --- drivers/scsi/scsi_lib.c | 7 +++++-- 1 files changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index b583277..6d8ca08 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -843,8 +843,11 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes) } else if (sense_valid && !sense_deferred) { switch (sshdr.sense_key) { case UNIT_ATTENTION: - if (cmd->device->removable) { - /* Detected disc change. Set a bit + if (cmd->device->removable && + (sshdr.asc == 0x3a || + (sshdr.asc == 0x28 && sshdr.ascq == 0x00))) { + /* "No medium" or "Medium may have changed." + * This means a disc change. Set a bit * and quietly refuse further access. */ cmd->device->changed = 1; -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html