From 36304f3d7a32fc4e7573fa6f3db2efb437416639 Mon Sep 17 00:00:00 2001
From: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date: Fri, 8 Dec 2017 15:56:26 +0100
Subject: spi: Use self-contained mutex

Update #2843.
---
 cpukit/dev/spi/spi-bus.c | 36 ++++++------------------------------
 1 file changed, 6 insertions(+), 30 deletions(-)

(limited to 'cpukit/dev/spi')

diff --git a/cpukit/dev/spi/spi-bus.c b/cpukit/dev/spi/spi-bus.c
index 343e203485..a3ee6f14fb 100644
--- a/cpukit/dev/spi/spi-bus.c
+++ b/cpukit/dev/spi/spi-bus.c
@@ -7,7 +7,7 @@
  */
 
 /*
- * Copyright (c) 2016 embedded brains GmbH.  All rights reserved.
+ * Copyright (c) 2016, 2017 embedded brains GmbH.  All rights reserved.
  *
  *  embedded brains GmbH
  *  Dornierstr. 4
@@ -33,20 +33,12 @@
 
 static void spi_bus_obtain(spi_bus *bus)
 {
-  rtems_status_code sc;
-
-  sc = rtems_semaphore_obtain(bus->mutex, RTEMS_WAIT, RTEMS_NO_TIMEOUT);
-  _Assert(sc == RTEMS_SUCCESSFUL);
-  (void) sc;
+  rtems_recursive_mutex_lock(&bus->mutex);
 }
 
 static void spi_bus_release(spi_bus *bus)
 {
-  rtems_status_code sc;
-
-  sc = rtems_semaphore_release(bus->mutex);
-  _Assert(sc == RTEMS_SUCCESSFUL);
-  (void) sc;
+  rtems_recursive_mutex_unlock(&bus->mutex);
 }
 
 static void spi_bus_set_defaults(spi_bus *bus, spi_ioc_transfer *msg)
@@ -304,34 +296,18 @@ static int spi_bus_do_init(
   void (*destroy)(spi_bus *bus)
 )
 {
-  rtems_status_code sc;
-
-  sc = rtems_semaphore_create(
-    rtems_build_name('S', 'P', 'I', ' '),
-    1,
-    RTEMS_BINARY_SEMAPHORE | RTEMS_INHERIT_PRIORITY | RTEMS_PRIORITY,
-    0,
-    &bus->mutex
-  );
-  if (sc != RTEMS_SUCCESSFUL) {
-    (*destroy)(bus);
-    rtems_set_errno_and_return_minus_one(ENOMEM);
-  }
-
+  rtems_recursive_mutex_init(&bus->mutex, "SPI Bus");
   bus->transfer = spi_bus_transfer_default;
   bus->setup = spi_bus_setup_default;
   bus->destroy = destroy;
   bus->bits_per_word = 8;
+
   return 0;
 }
 
 void spi_bus_destroy(spi_bus *bus)
 {
-  rtems_status_code sc;
-
-  sc = rtems_semaphore_delete(bus->mutex);
-  _Assert(sc == RTEMS_SUCCESSFUL);
-  (void) sc;
+  rtems_recursive_mutex_destroy(&bus->mutex);
 }
 
 void spi_bus_destroy_and_free(spi_bus *bus)
-- 
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