FROMGIT: scsi: sd: sd_zbc: Verify that the zone size is a power of two

The following check in sd_zbc_cmnd_checks() can only work correctly if the
zone size is a power of two:

	if (sector & (sd_zbc_zone_sectors(sdkp) - 1))
		/* Unaligned request */
		return BLK_STS_IOERR;

Hence this patch that verifies that the zone size is a power of two.

Link: https://lore.kernel.org/r/20220421183023.3462291-3-bvanassche@acm.org
Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Bug: 230616396
(cherry picked from commit 9a93b9c9d3 mkp-scsi/staging)
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Change-Id: I99b06e3dbc4f99d3696edde0af60e8fb876745b7

drivers/scsi/sd_zbc.c

@@ -666,6 +666,13 @@ static int sd_zbc_check_capacity(struct scsi_disk *sdkp, unsigned char *buf,
 		return -EFBIG;
 	}
 
+	if (!is_power_of_2(zone_blocks)) {
+		sd_printk(KERN_ERR, sdkp,
+			  "Zone size %llu is not a power of two.\n",
+			  zone_blocks);
+		return -EINVAL;
+	}
+
 	*zblocks = zone_blocks;
 
 	return 0;