1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 4f9b6d792017..5d0e135824f9 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -3898,6 +3898,13 @@ static struct pci_driver cciss_pci_driver = {
  */
 static int __init cciss_init(void)
 {
+        /*
+         * The hardware requires that commands are aligned on a 64-bit
+         * boundary. Given that we use pci_alloc_consistent() to allocate an
+         * array of them, the size must be a multiple of 8 bytes.
+         */
+        BUILD_BUG_ON(sizeof(CommandList_struct) % 8);
+
         printk(KERN_INFO DRIVER_NAME "\n");
 
         /* Register for our PCI devices */