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@@ -3224,6 +3224,8 @@ static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
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fcx_multitrack = private->features.feature[40] & 0x20;
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data_size = blk_rq_bytes(req);
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+ if (data_size % blksize)
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+ return ERR_PTR(-EINVAL);
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/* tpm write request add CBC data on each track boundary */
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if (rq_data_dir(req) == WRITE)
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data_size += (last_trk - first_trk) * 4;
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