diff --git a/drivers/staging/bcm/Bcmchar.c b/drivers/staging/bcm/Bcmchar.c
index 179707b5e7c7d915a7cc2845b40971af926478a3..8bf3f575160ff845304b1bd5eb8d3849abaeedaa 100644
--- a/drivers/staging/bcm/Bcmchar.c
+++ b/drivers/staging/bcm/Bcmchar.c
@@ -1302,8 +1302,10 @@ static long bcm_char_ioctl(struct file *filp, UINT cmd, ULONG arg)
 		/*
 		 * Deny the access if the offset crosses the cal area limit.
 		 */
+		if (stNVMReadWrite.uiNumBytes > Adapter->uiNVMDSDSize)
+			return STATUS_FAILURE;
 
-		if ((stNVMReadWrite.uiOffset + stNVMReadWrite.uiNumBytes) > Adapter->uiNVMDSDSize) {
+		if (stNVMReadWrite.uiOffset > Adapter->uiNVMDSDSize - stNVMReadWrite.uiNumBytes) {
 			/* BCM_DEBUG_PRINT(Adapter,DBG_TYPE_PRINTK, 0, 0,"Can't allow access beyond NVM Size: 0x%x 0x%x\n", stNVMReadWrite.uiOffset, stNVMReadWrite.uiNumBytes); */
 			return STATUS_FAILURE;
 		}