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rtc: class: avoid unnecessary lookup in hctosys

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rtc_hctosys is only called when the relevant RTC is found, avoid looking it
up while we already have a pinter to the proper struct rtc_device.

Link: https://lore.kernel.org/r/20200323213039.297458-1-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Alexandre Belloni 2020-03-23 22:30:39 +01:00
parent f1cd223389
commit 5614a4a3ca
1 changed files with 2 additions and 14 deletions
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16
drivers/rtc/class.c
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@ -46,20 +46,13 @@ int rtc_hctosys_ret = -ENODEV;
* the best guess is to add 0.5s. * the best guess is to add 0.5s.
*/ */
static int rtc_hctosys(void) static void rtc_hctosys(struct rtc_device *rtc)
{ {
int err = -ENODEV; int err = -ENODEV;
struct rtc_time tm; struct rtc_time tm;
struct timespec64 tv64 = { struct timespec64 tv64 = {
.tv_nsec = NSEC_PER_SEC >> 1, .tv_nsec = NSEC_PER_SEC >> 1,
}; };
struct rtc_device *rtc = rtc_class_open(CONFIG_RTC_HCTOSYS_DEVICE);
if (!rtc) {
pr_info("unable to open rtc device (%s)\n",
CONFIG_RTC_HCTOSYS_DEVICE);
goto err_open;
}
err = rtc_read_time(rtc, &tm); err = rtc_read_time(rtc, &tm);
if (err) { if (err) {
@ -83,12 +76,7 @@ static int rtc_hctosys(void)
&tm, (long long)tv64.tv_sec); &tm, (long long)tv64.tv_sec);
err_read: err_read:
rtc_class_close(rtc);
err_open:
rtc_hctosys_ret = err; rtc_hctosys_ret = err;
return err;
} }
#endif #endif
@ -433,7 +421,7 @@ int __rtc_register_device(struct module *owner, struct rtc_device *rtc)
#ifdef CONFIG_RTC_HCTOSYS_DEVICE #ifdef CONFIG_RTC_HCTOSYS_DEVICE
if (!strcmp(dev_name(&rtc->dev), CONFIG_RTC_HCTOSYS_DEVICE)) if (!strcmp(dev_name(&rtc->dev), CONFIG_RTC_HCTOSYS_DEVICE))
rtc_hctosys(); rtc_hctosys(rtc);
#endif #endif
return 0; return 0;