[dpdk-stable] [PATCH] crypto/qat: fix uninitilized compiler warning

[Feifei Wang]

In Arm platform, when "RTE_ARCH_ARM64_MEMCPY" is set as true, compiler
will report variable uninitilized warning:

../drivers/crypto/qat/qat_sym_session.c: In function ‘partial_hash_compute’:
../lib/eal/include/generic/rte_byteorder.h:241:24: warning:
‘<U35a0>’ may be used uninitialized in this function
	[-Wmaybe-uninitialized]
	241 | #define rte_bswap32(x) __builtin_bswap32(x)
	...

This is because "digest" will be initialized by "rte_memcpy" function
rather than "memcpy" if "RTE_ARCH_ARM64_MEMCPY" is set as true. However,
compiler cannot know it is initialized by the function.

To fix this, use "calloc" to initialize "digest".

Fixes: cd7fc8a84b48 ("eal/arm64: optimize memcpy")
Cc: stable at dpdk.org

Signed-off-by: Feifei Wang <feifei.wang2 at arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang at arm.com>
---
 drivers/crypto/qat/qat_sym_session.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/qat/qat_sym_session.c b/drivers/crypto/qat/qat_sym_session.c
index 231b1640da..dab23a3290 100644
--- a/drivers/crypto/qat/qat_sym_session.c
+++ b/drivers/crypto/qat/qat_sym_session.c
@@ -1190,8 +1190,8 @@ static int partial_hash_compute(enum icp_qat_hw_auth_algo hash_alg,
 			uint8_t *data_out)
 {
 	int digest_size;
-	uint8_t digest[qat_hash_get_digest_size(
-			ICP_QAT_HW_AUTH_ALGO_DELIMITER)];
+	uint8_t *digest = (uint8_t *)calloc(qat_hash_get_digest_size(
+				ICP_QAT_HW_AUTH_ALGO_DELIMITER), sizeof(uint8_t));
 	uint32_t *hash_state_out_be32;
 	uint64_t *hash_state_out_be64;
 	int i;
-- 
2.25.1