scsi: ufs: core: Add a compile-time structure size check

Before modifying struct ufshcd_sg_entry, add a compile-time structure size
check.

Link: https://lore.kernel.org/r/20211020214024.2007615-10-bvanassche@acm.org
Acked-by: Avri Altman <Avri.Altman@wdc.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 7ea0588247b0e6a804797478a38988a83485525c..dde4d3f607f23f67d8ecb73a1cf3ec89b2bf2922 100644 (file)
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -9791,6 +9791,11 @@ static int __init ufshcd_core_init(void)
 {
        int ret;
 
+       /* Verify that there are no gaps in struct utp_transfer_cmd_desc. */
+       static_assert(sizeof(struct utp_transfer_cmd_desc) ==
+                     2 * ALIGNED_UPIU_SIZE +
+                             SG_ALL * sizeof(struct ufshcd_sg_entry));
+
        ufs_debugfs_init();
 
        ret = scsi_register_driver(&ufs_dev_wlun_template.gendrv);