sd_zbc: Force use of READ16/WRITE16
Normally, sd_read_capacity sets sdp->use_16_for_rw to 1 based on the disk capacity so that READ16/WRITE16 are used for large drives. However, for a zoned disk with RC_BASIS set to 0, the capacity reported through READ_CAPACITY may be very small, leading to use_16_for_rw not being set and READ10/WRITE10 commands being used, even after the actual zoned disk capacity is corrected in sd_zbc_read_zones. This causes LBA offset overflow for accesses beyond 2TB. As the ZBC standard makes it mandatory for ZBC drives to support the READ16/WRITE16 commands anyway, make sure that use_16_for_rw is set. Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> eviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
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@ -612,6 +612,10 @@ int sd_zbc_read_zones(struct scsi_disk *sdkp,
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if (ret)
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goto err;
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/* READ16/WRITE16 is mandatory for ZBC disks */
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sdkp->device->use_16_for_rw = 1;
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sdkp->device->use_10_for_rw = 0;
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return 0;
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err:
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