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Commit ab3ea36e authored by Alexandre Belloni's avatar Alexandre Belloni
Browse files

rtc: nvmem: disallow registering nvmem more than once 



Make rtc_nvmem_register return -EBUSY when an nvmem is already registered
for that RTC.

Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@bootlin.com>
parent 2cc82121

drivers/rtc/nvmem.c

+3 −0
Original line number Original line Diff line number Diff line
@@ -87,6 +87,9 @@ static void rtc_nvram_unregister(struct rtc_device *rtc) 
int rtc_nvmem_register(struct rtc_device *rtc,

int rtc_nvmem_register(struct rtc_device *rtc,

		       struct nvmem_config *nvmem_config)

		       struct nvmem_config *nvmem_config)

{

{

	if (!IS_ERR_OR_NULL(rtc->nvmem))

		return -EBUSY;



	if (!nvmem_config)

	if (!nvmem_config)

		return -ENODEV;

		return -ENODEV;