docs: libata.rst: fix a wrong usage of :c:type: tag
The usage of :c:type: to reference to a struct member is wrong,
as pointed by Sphinx 3:
./Documentation/driver-api/libata.rst:511: WARNING: Unparseable C cross-reference: 'qc->complete_fn'
Invalid C declaration: Expected end of definition. [error at 2]
qc->complete_fn
--^
Instead, let's use :c:expr: for such purpose.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
diff --git a/Documentation/driver-api/libata.rst b/Documentation/driver-api/libata.rst
index e2f87b8..d477e29 100644
--- a/Documentation/driver-api/libata.rst
+++ b/Documentation/driver-api/libata.rst
@@ -508,7 +508,7 @@
2. ATA_QCFLAG_ACTIVE is cleared from qc->flags.
-3. :c:func:`qc->complete_fn` callback is invoked. If the return value of the
+3. :c:expr:`qc->complete_fn` callback is invoked. If the return value of the
callback is not zero. Completion is short circuited and
:c:func:`ata_qc_complete` returns.