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iscsi: Don't use error_is_set() to suppress additional errors

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Using error_is_set(errp) that way can sweep programming errors under
the carpet when we get called incorrectly with an error set.

Commit 24d3bd6 added a broken error path to iscsi_do_inquiry(): it
first calls error_setg(), then jumps to the preexisting error label,
where error_setg() gets called again, triggering an assertion failure.

Commit cbee81f fixed this by guarding the second error_setg() with an
error_is_set().

Replace this fix by a simpler and safer one: jump right behind the
second error_setg().

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Markus Armbruster 2014-04-25 16:50:35 +02:00 • committed by Stefan Hajnoczi
parent f70edf9948
commit 172fc4dd33
1 changed files with 4 additions and 5 deletions
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5
block/iscsi.c
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@ -1095,16 +1095,15 @@ static struct scsi_task *iscsi_do_inquiry(struct iscsi_context *iscsi, int lun,
*inq = scsi_datain_unmarshall(task); *inq = scsi_datain_unmarshall(task);
if (*inq == NULL) { if (*inq == NULL) {
error_setg(errp, "iSCSI: failed to unmarshall inquiry datain blob"); error_setg(errp, "iSCSI: failed to unmarshall inquiry datain blob");
goto fail; goto fail_with_err;
} }
return task; return task;
fail: fail:
if (!error_is_set(errp)) {
error_setg(errp, "iSCSI: Inquiry command failed : %s", error_setg(errp, "iSCSI: Inquiry command failed : %s",
iscsi_get_error(iscsi)); iscsi_get_error(iscsi));
} fail_with_err:
if (task != NULL) { if (task != NULL) {
scsi_free_scsi_task(task); scsi_free_scsi_task(task);
} }