Changes in uspace/drv/uhci-hcd/transfer_list.c [d736fe38:4125b7d] in mainline

File:

• uspace/drv/uhci-hcd/transfer_list.c (modified) (4 diffs)

uspace/drv/uhci-hcd/transfer_list.c

@@ -34 +34 @@
 #include <errno.h>
 #include <usb/debug.h>
-#include <arch/barrier.h>
 
 #include "transfer_list.h"
@@ -72 +71 @@
  * @param[in] instance Memory place to use.
  *
- * Frees memory of the internal qh_t structure.
+ * Frees memory for internal qh_t structure.
  */
 void transfer_list_fini(transfer_list_t *instance)
@@ -127 +126 @@
         assert((pa & LINK_POINTER_ADDRESS_MASK) == pa);
 
-        /* Make sure all data in the batch are written */
-        write_barrier();
-
         /* keep link */
         batch_qh(batch)->next = last_qh->next;
         qh_set_next_qh(last_qh, batch_qh(batch));
 
-        /* Make sure the pointer is updated */
-        write_barrier();
+        asm volatile ("": : :"memory");
 
         /* Add to the driver list */
@@ -227 +222 @@
             == addr_to_phys(batch_qh(batch)));
         prev_qh->next = batch_qh(batch)->next;
-
-        /* Make sure the pointer is updated */
-        write_barrier();
-
+        asm volatile ("": : :"memory");
         /* Remove from the batch list */
         list_remove(&batch->link);