diff --git a/drivers/bch/bchdev_driver.c b/drivers/bch/bchdev_driver.c
index 7032908a5b..59c97a6ea8 100644
--- a/drivers/bch/bchdev_driver.c
+++ b/drivers/bch/bchdev_driver.c
@@ -435,6 +435,14 @@ static int bch_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
         break;
 #endif
 
+      case BIOC_DISCARD:
+        {
+          /* Invalidate the sector so next read is from the device- */
+
+          bch->sector = (size_t)-1;
+          goto ioctl_default;
+        }
+
       case BIOC_FLUSH:
         {
           /* Flush any dirty pages remaining in the cache */
@@ -450,6 +458,7 @@ static int bch_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
 
       /* Pass the IOCTL command on to the contained block driver. */
 
+ioctl_default:
       default:
         {
           FAR struct inode *bchinode = bch->inode;
@@ -462,7 +471,8 @@ static int bch_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
 
               /* Drivers may not support command BIOC_FLUSH */
 
-              if (ret == -ENOTTY && cmd == BIOC_FLUSH)
+              if (ret == -ENOTTY && (cmd == BIOC_FLUSH ||
+                  cmd == BIOC_DISCARD))
                 {
                   ret = 0;
                 }
diff --git a/drivers/misc/rwbuffer.c b/drivers/misc/rwbuffer.c
index 91e6307fde..9a357a4ab7 100644
--- a/drivers/misc/rwbuffer.c
+++ b/drivers/misc/rwbuffer.c
@@ -1279,4 +1279,30 @@ int rwb_flush(FAR struct rwbuffer_s *rwb)
 }
 #endif
 
+/****************************************************************************
+ * Name: rwb_flush
+ *
+ * Description:
+ *   Flush the write buffer
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_DRVR_READAHEAD
+int rwb_discard(FAR struct rwbuffer_s *rwb)
+{
+  int ret;
+
+  ret = rwb_lock(&rwb->rhlock);
+  if (ret < 0)
+    {
+      return ret;
+    }
+
+  rwb_resetrhbuffer(rwb);
+  rwb_unlock(&rwb->rhlock);
+
+  return ret;
+}
+#endif
+
 #endif /* CONFIG_DRVR_WRITEBUFFER || CONFIG_DRVR_READAHEAD */
diff --git a/drivers/mtd/ftl.c b/drivers/mtd/ftl.c
index 04f9fc7592..3b0e0a29b7 100644
--- a/drivers/mtd/ftl.c
+++ b/drivers/mtd/ftl.c
@@ -716,6 +716,13 @@ static int ftl_ioctl(FAR struct inode *inode, int cmd, unsigned long arg)
 
   dev = inode->i_private;
 
+  if (cmd == BIOC_DISCARD)
+    {
+#ifdef CONFIG_FTL_READAHEAD
+      rwb_discard(&dev->rwb);
+#endif
+    }
+
   if (cmd == BIOC_FLUSH)
     {
 #ifdef CONFIG_FTL_WRITEBUFFER
diff --git a/include/nuttx/drivers/rwbuffer.h b/include/nuttx/drivers/rwbuffer.h
index 32ce6db0e0..30b1463e33 100644
--- a/include/nuttx/drivers/rwbuffer.h
+++ b/include/nuttx/drivers/rwbuffer.h
@@ -198,6 +198,10 @@ int rwb_invalidate(FAR struct rwbuffer_s *rwb,
 int rwb_flush(FAR struct rwbuffer_s *rwb);
 #endif
 
+#ifdef CONFIG_DRVR_READAHEAD
+int rwb_discard(FAR struct rwbuffer_s *rwb);
+#endif
+
 #undef EXTERN
 #if defined(__cplusplus)
 }
diff --git a/include/nuttx/fs/ioctl.h b/include/nuttx/fs/ioctl.h
index 67b7304efd..ed2d62bb67 100644
--- a/include/nuttx/fs/ioctl.h
+++ b/include/nuttx/fs/ioctl.h
@@ -348,6 +348,10 @@
                                            *      to return sector numbers.
                                            * OUT: Data return in user-provided
                                            *      buffer. */
+#define BIOC_DISCARD    _BIOC(0x0011)     /* Discards the block device read buffer
+                                           * IN:  None
+                                           * OUT: None (ioctl return value provides
+                                           *      success/failure indication). */
 
 /* NuttX MTD driver ioctl definitions ***************************************/