4.9-stable review patch. If anyone has any objections, please let me know.
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From: Philipp Zabel p.zabel@pengutronix.de
commit 62e24c5775ecb387a3eb33701378ccfa6dbc98ee upstream.
Rename the internal __reset_control_get/put functions to __reset_control_get/put_internal and add an exported __reset_control_get equivalent to __of_reset_control_get that takes a struct device parameter. This avoids the confusing call to __of_reset_control_get in the non-DT case and fixes the devm_reset_control_get_optional function to return NULL if RESET_CONTROLLER is enabled but dev->of_node == NULL.
Fixes: bb475230b8e5 ("reset: make optional functions really optional") Reported-by: Andy Shevchenko andriy.shevchenko@linux.intel.com Tested-by: Andy Shevchenko andriy.shevchenko@linux.intel.com Cc: Ramiro Oliveira Ramiro.Oliveira@synopsys.com Signed-off-by: Philipp Zabel p.zabel@pengutronix.de Cc: Dinh Nguyen dinguyen@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/reset/core.c | 22 ++++++++++++++++------ include/linux/reset.h | 22 ++++++++++++++-------- 2 files changed, 30 insertions(+), 14 deletions(-)
--- a/drivers/reset/core.c +++ b/drivers/reset/core.c @@ -241,7 +241,7 @@ int reset_control_status(struct reset_co } EXPORT_SYMBOL_GPL(reset_control_status);
-static struct reset_control *__reset_control_get( +static struct reset_control *__reset_control_get_internal( struct reset_controller_dev *rcdev, unsigned int index, int shared) { @@ -274,7 +274,7 @@ static struct reset_control *__reset_con return rstc; }
-static void __reset_control_put(struct reset_control *rstc) +static void __reset_control_put_internal(struct reset_control *rstc) { lockdep_assert_held(&reset_list_mutex);
@@ -343,7 +343,7 @@ struct reset_control *__of_reset_control }
/* reset_list_mutex also protects the rcdev's reset_control list */ - rstc = __reset_control_get(rcdev, rstc_id, shared); + rstc = __reset_control_get_internal(rcdev, rstc_id, shared);
mutex_unlock(&reset_list_mutex);
@@ -351,6 +351,17 @@ struct reset_control *__of_reset_control } EXPORT_SYMBOL_GPL(__of_reset_control_get);
+struct reset_control *__reset_control_get(struct device *dev, const char *id, + int index, bool shared, bool optional) +{ + if (dev->of_node) + return __of_reset_control_get(dev->of_node, id, index, shared, + optional); + + return optional ? NULL : ERR_PTR(-EINVAL); +} +EXPORT_SYMBOL_GPL(__reset_control_get); + /** * reset_control_put - free the reset controller * @rstc: reset controller @@ -362,7 +373,7 @@ void reset_control_put(struct reset_cont return;
mutex_lock(&reset_list_mutex); - __reset_control_put(rstc); + __reset_control_put_internal(rstc); mutex_unlock(&reset_list_mutex); } EXPORT_SYMBOL_GPL(reset_control_put); @@ -383,8 +394,7 @@ struct reset_control *__devm_reset_contr if (!ptr) return ERR_PTR(-ENOMEM);
- rstc = __of_reset_control_get(dev ? dev->of_node : NULL, - id, index, shared, optional); + rstc = __reset_control_get(dev, id, index, shared, optional); if (!IS_ERR(rstc)) { *ptr = rstc; devres_add(dev, ptr); --- a/include/linux/reset.h +++ b/include/linux/reset.h @@ -15,6 +15,9 @@ int reset_control_status(struct reset_co struct reset_control *__of_reset_control_get(struct device_node *node, const char *id, int index, bool shared, bool optional); +struct reset_control *__reset_control_get(struct device *dev, const char *id, + int index, bool shared, + bool optional); void reset_control_put(struct reset_control *rstc); struct reset_control *__devm_reset_control_get(struct device *dev, const char *id, int index, bool shared, @@ -72,6 +75,13 @@ static inline struct reset_control *__of return optional ? NULL : ERR_PTR(-ENOTSUPP); }
+static inline struct reset_control *__reset_control_get( + struct device *dev, const char *id, + int index, bool shared, bool optional) +{ + return optional ? NULL : ERR_PTR(-ENOTSUPP); +} + static inline struct reset_control *__devm_reset_control_get( struct device *dev, const char *id, int index, bool shared, bool optional) @@ -102,8 +112,7 @@ __must_check reset_control_get_exclusive #ifndef CONFIG_RESET_CONTROLLER WARN_ON(1); #endif - return __of_reset_control_get(dev ? dev->of_node : NULL, id, 0, false, - false); + return __reset_control_get(dev, id, 0, false, false); }
/** @@ -131,22 +140,19 @@ __must_check reset_control_get_exclusive static inline struct reset_control *reset_control_get_shared( struct device *dev, const char *id) { - return __of_reset_control_get(dev ? dev->of_node : NULL, id, 0, true, - false); + return __reset_control_get(dev, id, 0, true, false); }
static inline struct reset_control *reset_control_get_optional_exclusive( struct device *dev, const char *id) { - return __of_reset_control_get(dev ? dev->of_node : NULL, id, 0, false, - true); + return __reset_control_get(dev, id, 0, false, true); }
static inline struct reset_control *reset_control_get_optional_shared( struct device *dev, const char *id) { - return __of_reset_control_get(dev ? dev->of_node : NULL, id, 0, true, - true); + return __reset_control_get(dev, id, 0, true, true); }
/**