Changeset c21e6a5 in mainline for uspace/lib/drv/generic/remote_usbhc.c

Timestamp:

2018-02-05T00:54:08Z (6 years ago)

Author:

Ondřej Hlavatý <aearsis@…>

Branches:

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

Children:

af16ebe

Parents:

65c059f

git-author:

Ondřej Hlavatý <aearsis@…> (2018-02-05 00:27:40)

git-committer:

Ondřej Hlavatý <aearsis@…> (2018-02-05 00:54:08)

Message:

usbhost: prepare buffers for transfers in library

File:

• uspace/lib/drv/generic/remote_usbhc.c (modified) (1 diff)

uspace/lib/drv/generic/remote_usbhc.c

@@ -428 +428 @@
                 return err;
 
+        /*
+         * As we're going to check the mapping, we must make sure the memory is
+         * actually mapped. We must do it right now, because the area might be
+         * read-only or write-only, and we may be unsure later.
+         */
+        if (flags & AS_AREA_READ) {
+                char foo = 0;
+                volatile const char *buf = trans->buffer;
+                for (size_t i = 0; i < size; i += PAGE_SIZE)
+                        foo += buf[i];
+        } else {
+                volatile char *buf = trans->buffer;
+                for (size_t i = 0; i < size; i += PAGE_SIZE)
+                        buf[i] = 0xff;
+        }
+
         return EOK;
 }