From: Thomas Bourgoin Date: Fri, 15 Dec 2023 11:17:24 +0000 (+0100) Subject: crypto: stm32/crc32 - fix parsing list of devices X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=0eaef675b94c746900dcea7f6c41b9a103ed5d53;p=linux.git crypto: stm32/crc32 - fix parsing list of devices smatch warnings: drivers/crypto/stm32/stm32-crc32.c:108 stm32_crc_get_next_crc() warn: can 'crc' even be NULL? Use list_first_entry_or_null instead of list_first_entry to retrieve the first device registered. The function list_first_entry always return a non NULL pointer even if the list is empty. Hence checking if the pointer returned is NULL does not tell if the list is empty or not. Reported-by: kernel test robot Closes: https://lore.kernel.org/r/202311281111.ou2oUL2i-lkp@intel.com/ Reported-by: Dan Carpenter Closes: https://lore.kernel.org/r/202311281111.ou2oUL2i-lkp@intel.com/ Signed-off-by: Thomas Bourgoin Signed-off-by: Herbert Xu --- diff --git a/drivers/crypto/stm32/stm32-crc32.c b/drivers/crypto/stm32/stm32-crc32.c index b2d5c8921ab36..b0cf6d2fd352f 100644 --- a/drivers/crypto/stm32/stm32-crc32.c +++ b/drivers/crypto/stm32/stm32-crc32.c @@ -104,7 +104,7 @@ static struct stm32_crc *stm32_crc_get_next_crc(void) struct stm32_crc *crc; spin_lock_bh(&crc_list.lock); - crc = list_first_entry(&crc_list.dev_list, struct stm32_crc, list); + crc = list_first_entry_or_null(&crc_list.dev_list, struct stm32_crc, list); if (crc) list_move_tail(&crc->list, &crc_list.dev_list); spin_unlock_bh(&crc_list.lock);