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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2016-01-19 09:00:21 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2016-01-25 22:42:09 +0800 |
| commit | 0f987e25cb8a9c23bfd70942a580c2698444e4b4 (patch) | |
| tree | 68080c60ed0d470058af4fd61d46e505abb46c6f /drivers/crypto/ixp4xx_crypto.c | |
| parent | 9dbcc215ad2cee4c07da359cc9e7ac315d031f1d (diff) | |
| download | blackbird-op-linux-0f987e25cb8a9c23bfd70942a580c2698444e4b4.tar.gz blackbird-op-linux-0f987e25cb8a9c23bfd70942a580c2698444e4b4.zip | |
crypto: ixp4xx - Fix false lastlen uninitialised warning
This patch fixes a false positive uninitialised variable warning
in aead_perform by moving the source processing in front of the
destination processing, thus ensuring that the initialisation of
lastlen is always visible to gcc.
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/crypto/ixp4xx_crypto.c')
| -rw-r--r-- | drivers/crypto/ixp4xx_crypto.c | 26 |
1 files changed, 12 insertions, 14 deletions
diff --git a/drivers/crypto/ixp4xx_crypto.c b/drivers/crypto/ixp4xx_crypto.c index e52496a172d0..2296934455fc 100644 --- a/drivers/crypto/ixp4xx_crypto.c +++ b/drivers/crypto/ixp4xx_crypto.c @@ -1031,6 +1031,18 @@ static int aead_perform(struct aead_request *req, int encrypt, BUG_ON(ivsize && !req->iv); memcpy(crypt->iv, req->iv, ivsize); + buf = chainup_buffers(dev, req->src, crypt->auth_len, + &src_hook, flags, src_direction); + req_ctx->src = src_hook.next; + crypt->src_buf = src_hook.phys_next; + if (!buf) + goto free_buf_src; + + lastlen = buf->buf_len; + if (lastlen >= authsize) + crypt->icv_rev_aes = buf->phys_addr + + buf->buf_len - authsize; + req_ctx->dst = NULL; if (req->src != req->dst) { @@ -1055,20 +1067,6 @@ static int aead_perform(struct aead_request *req, int encrypt, } } - buf = chainup_buffers(dev, req->src, crypt->auth_len, - &src_hook, flags, src_direction); - req_ctx->src = src_hook.next; - crypt->src_buf = src_hook.phys_next; - if (!buf) - goto free_buf_src; - - if (!encrypt || !req_ctx->dst) { - lastlen = buf->buf_len; - if (lastlen >= authsize) - crypt->icv_rev_aes = buf->phys_addr + - buf->buf_len - authsize; - } - if (unlikely(lastlen < authsize)) { /* The 12 hmac bytes are scattered, * we need to copy them into a safe buffer */ |
