Have a look at find_image_format():
if (blk_is_sg(file) || !blk_is_inserted(file) || blk_getlength(file) == 0) {
*pdrv = &bdrv_raw;
return ret;
}
blk_getlength() can fail. Shouldn't we error out then?
We pretty obviously should in img_map():
length = blk_getlength(blk);
while (curr.start + curr.length < length) {
Since I have to touch @length in the series I'm working on, I'll stick
in a fix.
