[PATCH] Fixup blk_rq_unmap_user() API
The blk_rq_unmap_user() API is not very nice. It expects the caller to know that rq->bio has to be reset to the original bio, and it will silently do nothing if that is not done. Instead make it explicit that we need to pass in the first bio, by expecting a bio argument. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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@@ -2139,8 +2139,7 @@ static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
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cdi->last_sense = s->sense_key;
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}
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rq->bio = bio;
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if (blk_rq_unmap_user(rq))
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if (blk_rq_unmap_user(bio))
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ret = -EFAULT;
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if (ret)
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