From: Greg Edwards Date: Thu, 26 Jul 2018 19:52:54 +0000 (-0400) Subject: scsi: virtio_scsi: fix pi_bytes{out,in} on 4 KiB block size devices X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=cdcdcaae8450a975e7d07e1bfec21f9b8c016d0c;p=openwrt%2Fstaging%2Fblogic.git scsi: virtio_scsi: fix pi_bytes{out,in} on 4 KiB block size devices When the underlying device is a 4 KiB logical block size device with a protection interval exponent of 0, i.e. 4096 bytes data + 8 bytes PI, the driver miscalculates the pi_bytes{out,in} by a factor of 8x (64 bytes). This leads to errors on all reads and writes on 4 KiB logical block size devices when CONFIG_BLK_DEV_INTEGRITY is enabled and the VIRTIO_SCSI_F_T10_PI feature bit has been negotiated. Fixes: e6dc783a38ec0 ("virtio-scsi: Enable DIF/DIX modes in SCSI host LLD") Acked-by: Martin K. Petersen Signed-off-by: Greg Edwards Signed-off-by: Jens Axboe --- diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c index 6dc8891ccb74..1c72db94270e 100644 --- a/drivers/scsi/virtio_scsi.c +++ b/drivers/scsi/virtio_scsi.c @@ -513,12 +513,12 @@ static void virtio_scsi_init_hdr_pi(struct virtio_device *vdev, if (sc->sc_data_direction == DMA_TO_DEVICE) cmd_pi->pi_bytesout = cpu_to_virtio32(vdev, - blk_rq_sectors(rq) * - bi->tuple_size); + bio_integrity_bytes(bi, + blk_rq_sectors(rq))); else if (sc->sc_data_direction == DMA_FROM_DEVICE) cmd_pi->pi_bytesin = cpu_to_virtio32(vdev, - blk_rq_sectors(rq) * - bi->tuple_size); + bio_integrity_bytes(bi, + blk_rq_sectors(rq))); } #endif