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base: soc: Make soc_device_match() simpler and easier to read 

The function soc_device_match() is difficult to read for various
reasons:
  - There are two loop conditions using different styles: "while (...)"
    (which is BTW always true) vs. "if ... break",
  - The are two return condition using different logic: "if ... return
    foo" vs. "if ... else return bar".

Make the code easier to read by:
  1. Removing the always-true "!ret" loop condition, and dropping the
     now unneeded pre-initialization of "ret",
  2. Converting "if ... break" to a proper "while (...)" loop condition,
  3. Inverting the logic of the second return condition.

Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/9f9107c06f7d065ae6581e5290ef5d72f7298fd1.1646132835.git.geert+renesas@glider.be
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Geert Uytterhoeven 2022-03-01 12:10:35 +01:00 committed by Greg Kroah-Hartman
parent f2aad54703
commit b0f6807d35
1 changed files with 6 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/base/soc.c
View File

@ -241,15 +241,13 @@ static int soc_device_match_one(struct device *dev, void *arg)
const struct soc_device_attribute *soc_device_match(
const struct soc_device_attribute *matches)
{
int ret = 0;
int ret;
if (!matches)
return NULL;
while (!ret) {
if (!(matches->machine || matches->family ||
matches->revision || matches->soc_id))
break;
while (matches->machine || matches->family || matches->revision ||
matches->soc_id) {
ret = bus_for_each_dev(&soc_bus_type, NULL, (void *)matches,
soc_device_match_one);
if (ret < 0 && early_soc_dev_attr)
@ -257,10 +255,10 @@ const struct soc_device_attribute *soc_device_match(
matches);
if (ret < 0)
return NULL;
if (!ret)
matches++;
else
if (ret)
return matches;
matches++;
}
return NULL;
}