On Tue, Apr 14, 2020 at 05:25:17PM -0700, Scott Branden wrote:
> Remove unnecessary use of test_fw_mutex in test_dev_config_show_xxx
> functions that show simple bool, int, and u8.
I would expect at least a READ_ONCE(), yes?
>
> Signed-off-by: Scott Branden <scott.branden@xxxxxxxxxxxx>
> ---
> lib/test_firmware.c | 26 +++-----------------------
> 1 file changed, 3 insertions(+), 23 deletions(-)
>
> diff --git a/lib/test_firmware.c b/lib/test_firmware.c
> index 0c7fbcf07ac5..9fee2b93a8d1 100644
> --- a/lib/test_firmware.c
> +++ b/lib/test_firmware.c
> @@ -310,27 +310,13 @@ static int test_dev_config_update_bool(const char *buf, size_t size,
> return ret;
> }
>
> -static ssize_t
> -test_dev_config_show_bool(char *buf,
> - bool config)
> +static ssize_t test_dev_config_show_bool(char *buf, bool val)
> {
> - bool val;
> -
> - mutex_lock(&test_fw_mutex);
> - val = config;
> - mutex_unlock(&test_fw_mutex);
> -
> return snprintf(buf, PAGE_SIZE, "%d\n", val);
> }
>
> -static ssize_t test_dev_config_show_int(char *buf, int cfg)
> +static ssize_t test_dev_config_show_int(char *buf, int val)
> {
> - int val;
> -
> - mutex_lock(&test_fw_mutex);
> - val = cfg;
> - mutex_unlock(&test_fw_mutex);
> -
> return snprintf(buf, PAGE_SIZE, "%d\n", val);
> }
>
> @@ -354,14 +340,8 @@ static int test_dev_config_update_u8(const char *buf, size_t size, u8 *cfg)
> return size;
> }
>
> -static ssize_t test_dev_config_show_u8(char *buf, u8 cfg)
> +static ssize_t test_dev_config_show_u8(char *buf, u8 val)
> {
> - u8 val;
> -
> - mutex_lock(&test_fw_mutex);
> - val = cfg;
> - mutex_unlock(&test_fw_mutex);
> -
> return snprintf(buf, PAGE_SIZE, "%u\n", val);
> }
>
> --
> 2.17.1
>
--
Kees Cook
