From 7ca4a9a10fe82ee50ce0da02c72791ecf7c83869 Mon Sep 17 00:00:00 2001 From: Radu Alexe Date: Tue, 25 Apr 2017 16:26:37 +0300 Subject: [PATCH] crypto: caam - incapsulate dropping leading zeros into function MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This function will be used into further patches. Signed-off-by: Radu Alexe Signed-off-by: Horia Geantă Signed-off-by: Herbert Xu --- drivers/crypto/caam/caampkc.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/crypto/caam/caampkc.c b/drivers/crypto/caam/caampkc.c index 999ba18495b0..d2c6977ba82e 100644 --- a/drivers/crypto/caam/caampkc.c +++ b/drivers/crypto/caam/caampkc.c @@ -357,6 +357,14 @@ static void caam_rsa_free_key(struct caam_rsa_key *key) key->n_sz = 0; } +static void caam_rsa_drop_leading_zeros(const u8 **ptr, size_t *nbytes) +{ + while (!**ptr && *nbytes) { + (*ptr)++; + (*nbytes)--; + } +} + /** * caam_read_raw_data - Read a raw byte stream as a positive integer. * The function skips buffer's leading zeros, copies the remained data @@ -370,10 +378,7 @@ static inline u8 *caam_read_raw_data(const u8 *buf, size_t *nbytes) { u8 *val; - while (!*buf && *nbytes) { - buf++; - (*nbytes)--; - } + caam_rsa_drop_leading_zeros(&buf, nbytes); if (!*nbytes) return NULL;