On Mon, Mar 06, 2023 at 09:17:23AM -0800, Guenter Roeck wrote:
> On 3/6/23 01:09, Uwe Kleine-König wrote:
> > s3c2410_get_wdt_drv_data() is only called by s3c2410wdt_probe(), so the
> > implementation of the former can move to the latter.
> >
> > scripts/bloat-o-meter reports for this change (on an ARCH=arm
> > allmodconfig build):
> >
> > add/remove: 1/1 grow/shrink: 0/2 up/down: 4/-129 (-125)
> >
>
> The reason for separating functions in this case wasn't that the separate function
> would be called several times. It was to improve code readability. If anything,
> I would argue that it might sense to split the already lengthy probe function
> further instead of combining it.
Agreed. For dev_err_probe() to work the following would be alternatively
possible:
diff --git a/drivers/watchdog/s3c2410_wdt.c b/drivers/watchdog/s3c2410_wdt.c
index 58b262ca4e88..564919717761 100644
--- a/drivers/watchdog/s3c2410_wdt.c
+++ b/drivers/watchdog/s3c2410_wdt.c
@@ -579,8 +579,8 @@ static inline unsigned int s3c2410wdt_get_bootstatus(struct s3c2410_wdt *wdt)
return 0;
}
-static inline const struct s3c2410_wdt_variant *
-s3c2410_get_wdt_drv_data(struct platform_device *pdev)
+static inline int
+s3c2410_get_wdt_drv_data(struct platform_device *pdev, struct s3c2410_wdt *wdt)
{
const struct s3c2410_wdt_variant *variant;
struct device *dev = &pdev->dev;
@@ -603,24 +603,26 @@ s3c2410_get_wdt_drv_data(struct platform_device *pdev)
"samsung,cluster-index", &index);
if (err) {
dev_err(dev, "failed to get cluster index\n");
- return NULL;
+ return -EINVAL;
}
switch (index) {
case 0:
- return variant;
+ break;
case 1:
- return (variant == &drv_data_exynos850_cl0) ?
+ variant = (variant == &drv_data_exynos850_cl0) ?
&drv_data_exynos850_cl1 :
&drv_data_exynosautov9_cl1;
+ break;
default:
dev_err(dev, "wrong cluster index: %u\n", index);
- return NULL;
+ return -EINVAL;
}
}
#endif
+ wdt->drv_data = variant;
- return variant;
+ return 0;
}
static void s3c2410wdt_wdt_disable_action(void *data)
@@ -644,9 +646,9 @@ static int s3c2410wdt_probe(struct platform_device *pdev)
spin_lock_init(&wdt->lock);
wdt->wdt_device = s3c2410_wdd;
- wdt->drv_data = s3c2410_get_wdt_drv_data(pdev);
- if (!wdt->drv_data)
- return -EINVAL;
+ ret = s3c2410_get_wdt_drv_data(pdev, wdt);
+ if (ret)
+ return ret;
if (wdt->drv_data->quirks & QUIRKS_HAVE_PMUREG) {
wdt->pmureg = syscon_regmap_lookup_by_phandle(dev->of_node,
I didn't check if it's the same as for my initial patch #1, but for an
allmodconfig ARCH=arm build this also has a nice bloatometer output:
add/remove: 1/1 grow/shrink: 0/1 up/down: 4/-104 (-100)
This would allow to make use of dev_err_probe() in
s3c2410_get_wdt_drv_data() and still maintain the split into two
functions.
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | https://www.pengutronix.de/ |
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