[PATCH 03/45] rtc: nvmem: return error values

From: Alexandre Belloni
Date: Mon Feb 12 2018 - 17:48:54 EST


In case of error, make rtc_nvmem_register() able to return an error value
to its caller.

Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>
---
drivers/rtc/nvmem.c | 10 ++++++----
drivers/rtc/rtc-core.h | 11 +++++++----
2 files changed, 13 insertions(+), 8 deletions(-)

diff --git a/drivers/rtc/nvmem.c b/drivers/rtc/nvmem.c
index 0a3522bcdd25..293df6db7c42 100644
--- a/drivers/rtc/nvmem.c
+++ b/drivers/rtc/nvmem.c
@@ -84,21 +84,23 @@ static void rtc_nvram_unregister(struct rtc_device *rtc)
/*
* New ABI, uses nvmem
*/
-void rtc_nvmem_register(struct rtc_device *rtc,
- struct nvmem_config *nvmem_config)
+int rtc_nvmem_register(struct rtc_device *rtc,
+ struct nvmem_config *nvmem_config)
{
if (!nvmem_config)
- return;
+ return -ENODEV;

nvmem_config->dev = &rtc->dev;
nvmem_config->owner = rtc->owner;
rtc->nvmem = nvmem_register(nvmem_config);
if (IS_ERR_OR_NULL(rtc->nvmem))
- return;
+ return PTR_ERR(rtc->nvmem);

/* Register the old ABI */
if (rtc->nvram_old_abi)
rtc_nvram_register(rtc, nvmem_config->size);
+
+ return 0;
}

void rtc_nvmem_unregister(struct rtc_device *rtc)
diff --git a/drivers/rtc/rtc-core.h b/drivers/rtc/rtc-core.h
index 5f60e3b11cde..05a67837fd76 100644
--- a/drivers/rtc/rtc-core.h
+++ b/drivers/rtc/rtc-core.h
@@ -48,11 +48,14 @@ static inline const struct attribute_group **rtc_get_dev_attribute_groups(void)
#endif

#ifdef CONFIG_RTC_NVMEM
-void rtc_nvmem_register(struct rtc_device *rtc,
- struct nvmem_config *nvmem_config);
+int rtc_nvmem_register(struct rtc_device *rtc,
+ struct nvmem_config *nvmem_config);
void rtc_nvmem_unregister(struct rtc_device *rtc);
#else
-static inline void rtc_nvmem_register(struct rtc_device *rtc,
- struct nvmem_config *nvmem_config) {}
+static inline int rtc_nvmem_register(struct rtc_device *rtc,
+ struct nvmem_config *nvmem_config)
+{
+ return -ENODEV;
+}
static inline void rtc_nvmem_unregister(struct rtc_device *rtc) {}
#endif
--
2.16.1