Changeset b3258ad in mainline

Timestamp:

2011-01-29T00:08:35Z (13 years ago)

Author:

Vojtech Horky <vojtechhorky@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

4046c1ea

Parents:

24b07ac4

Message:

Null data packet handled in TD initialization

File:

• uspace/drv/uhci/uhci_struct/transfer_descriptor.c (modified) (1 diff)

uspace/drv/uhci/uhci_struct/transfer_descriptor.c

@@ -41 +41 @@
         uhci_print_verbose("Creating status field: %x.\n", instance->status);
 
+        uint32_t maxlen_field = (size == 0) ? 0x7FF : ((uint32_t) size - 1);
+        maxlen_field = (maxlen_field & TD_DEVICE_MAXLEN_MASK)
+            << TD_DEVICE_MAXLEN_POS;
         instance->device = 0
-                | (((size - 1) & TD_DEVICE_MAXLEN_MASK) << TD_DEVICE_MAXLEN_POS)
+                | (maxlen_field)
                 | ((target.address & TD_DEVICE_ADDRESS_MASK) << TD_DEVICE_ADDRESS_POS)
                 | ((target.endpoint & TD_DEVICE_ENDPOINT_MASK) << TD_DEVICE_ENDPOINT_POS)