From: Bart Van Assche <bvanassche@acm.org>
Date: Wed, 20 Oct 2021 21:40:23 +0000 (-0700)
Subject: scsi: ufs: core: Add a compile-time structure size check
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=9a868c8ad3f467fe3487e3d96fc0e2f3c90f34f9;p=linux.git

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 7ea0588247b0e..dde4d3f607f23 100644
--- 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);