lib/string_helpers: fix not adding strarray to device's resource list

Add allocated strarray to device's resource list. This is a must to
automatically release strarray when the device disappears.

Without this fix we have a memory leak in the few drivers which use
devm_kasprintf_strarray().

Link: https://lkml.kernel.org/r/20220506044409.30066-1-puyou.lu@gmail.com
Link: https://lkml.kernel.org/r/20220506073623.2679-1-puyou.lu@gmail.com
Fixes: acdb89b6c87a ("lib/string_helpers: Introduce managed variant of kasprintf_strarray()")
Signed-off-by: Puyou Lu <puyou.lu@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/lib/string_helpers.c b/lib/string_helpers.c
index 4f877e9551d5b7116b5e1f028c1eab4d19516c5f..5ed3beb066e6d09fe8deae3607a8f58416ad13f3 100644 (file)
--- a/lib/string_helpers.c
+++ b/lib/string_helpers.c
@@ -757,6 +757,9 @@ char **devm_kasprintf_strarray(struct device *dev, const char *prefix, size_t n)
                return ERR_PTR(-ENOMEM);
        }
 
+       ptr->n = n;
+       devres_add(dev, ptr);
+
        return ptr->array;
 }
 EXPORT_SYMBOL_GPL(devm_kasprintf_strarray);