From 56410c0cb43e26a94af094aceab45a5ea38a1a38 Mon Sep 17 00:00:00 2001 From: Nathan Chancellor Date: Mon, 18 Feb 2019 20:22:40 -0700 Subject: hwrng: optee: Initialize some structs using memset instead of braces Clang warns: drivers/char/hw_random/optee-rng.c:80:31: warning: suggest braces around initialization of subobject [-Wmissing-braces] struct tee_param param[4] = {0}; ^ {} drivers/char/hw_random/optee-rng.c:177:31: warning: suggest braces around initialization of subobject [-Wmissing-braces] struct tee_param param[4] = {0}; ^ {} drivers/char/hw_random/optee-rng.c:212:48: warning: suggest braces around initialization of subobject [-Wmissing-braces] struct tee_ioctl_open_session_arg sess_arg = {0}; ^ {} 3 warnings generated. One way to fix these warnings is to add additional braces like Clang suggests; however, there has been a bit of push back from some maintainers, who just prefer memset as it is unambiguous, doesn't depend on a particular compiler version, and properly initializes all subobjects [1][2]. Do that here so there are no more warnings. [1]: https://lore.kernel.org/lkml/022e41c0-8465-dc7a-a45c-64187ecd9684@amd.com/ [2]: https://lore.kernel.org/lkml/20181128.215241.702406654469517539.davem@davemloft.net/ Fixes: 5fe8b1cc6a03 ("hwrng: add OP-TEE based rng driver") Link: https://github.com/ClangBuiltLinux/linux/issues/369 Signed-off-by: Nathan Chancellor Reviewed-by: Sumit Garg Signed-off-by: Arnd Bergmann --- drivers/char/hw_random/optee-rng.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/drivers/char/hw_random/optee-rng.c b/drivers/char/hw_random/optee-rng.c index 2b9fc8ac5500..46f4bcd28c41 100644 --- a/drivers/char/hw_random/optee-rng.c +++ b/drivers/char/hw_random/optee-rng.c @@ -76,8 +76,11 @@ static size_t get_optee_rng_data(struct optee_rng_private *pvt_data, u32 ret = 0; u8 *rng_data = NULL; size_t rng_size = 0; - struct tee_ioctl_invoke_arg inv_arg = {0}; - struct tee_param param[4] = {0}; + struct tee_ioctl_invoke_arg inv_arg; + struct tee_param param[4]; + + memset(&inv_arg, 0, sizeof(inv_arg)); + memset(¶m, 0, sizeof(param)); /* Invoke TA_CMD_GET_ENTROPY function of Trusted App */ inv_arg.func = TA_CMD_GET_ENTROPY; @@ -173,8 +176,11 @@ static struct optee_rng_private pvt_data = { static int get_optee_rng_info(struct device *dev) { u32 ret = 0; - struct tee_ioctl_invoke_arg inv_arg = {0}; - struct tee_param param[4] = {0}; + struct tee_ioctl_invoke_arg inv_arg; + struct tee_param param[4]; + + memset(&inv_arg, 0, sizeof(inv_arg)); + memset(¶m, 0, sizeof(param)); /* Invoke TA_CMD_GET_RNG_INFO function of Trusted App */ inv_arg.func = TA_CMD_GET_RNG_INFO; @@ -209,7 +215,9 @@ static int optee_rng_probe(struct device *dev) { struct tee_client_device *rng_device = to_tee_client_device(dev); int ret = 0, err = -ENODEV; - struct tee_ioctl_open_session_arg sess_arg = {0}; + struct tee_ioctl_open_session_arg sess_arg; + + memset(&sess_arg, 0, sizeof(sess_arg)); /* Open context with TEE driver */ pvt_data.ctx = tee_client_open_context(NULL, optee_ctx_match, NULL, -- cgit