Changeset c19a5a59 in mainline for uspace/lib/c/generic/device/hw_res.c

Timestamp:

2017-12-08T21:03:35Z (6 years ago)

Author:

Jiří Zárevúcky <zarevucky.jiri@…>

Branches:

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

Children:

c8211849

Parents:

f77c1c9

git-author:

Jiří Zárevúcky <zarevucky.jiri@…> (2017-12-07 21:23:47)

git-committer:

Jiří Zárevúcky <zarevucky.jiri@…> (2017-12-08 21:03:35)

Message:

Return value from hw_res_dma_channel_remain separately from error code.

File:

• uspace/lib/c/generic/device/hw_res.c (modified) (2 diffs)

uspace/lib/c/generic/device/hw_res.c

@@ -140 +140 @@
  * @param channel DMA channel.
  *
- * @return Number of bytes remaining in the buffer if positive.
- * @return Error code if negative.
+ * @param[out] rem Number of bytes remaining in the buffer if positive.
+ *
+ * @return Error code.
  *
  */
-int hw_res_dma_channel_remain(async_sess_t *sess, unsigned channel)
+int hw_res_dma_channel_remain(async_sess_t *sess, unsigned channel, size_t *rem)
 {
         async_exch_t *exch = async_exchange_begin(sess);
@@ -155 +156 @@
         
         if (ret == EOK)
-                return remain;
+                *rem = remain;
         
         return ret;