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crypto: qce - Return error for zero length messages 

Crypto engine BAM dma does not support 0 length data. Return unsupported
if zero length messages are passed for transformation.

Signed-off-by: Thara Gopinath <thara.gopinath@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Thara Gopinath 2021-02-11 15:01:22 -05:00 committed by Herbert Xu
parent 42f730a47b
commit f087894622
1 changed files with 5 additions and 0 deletions
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5
drivers/crypto/qce/skcipher.c
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@ -8,6 +8,7 @@
#include <linux/interrupt.h>
#include <linux/moduleparam.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <crypto/aes.h>
#include <crypto/internal/des.h>
#include <crypto/internal/skcipher.h>
@ -260,6 +261,10 @@ static int qce_skcipher_crypt(struct skcipher_request *req, int encrypt)
rctx->flags |= encrypt ? QCE_ENCRYPT : QCE_DECRYPT;
keylen = IS_XTS(rctx->flags) ? ctx->enc_keylen >> 1 : ctx->enc_keylen;
/* CE does not handle 0 length messages */
if (!req->cryptlen)
return 0;
/* qce is hanging when AES-XTS request len > QCE_SECTOR_SIZE and
* is not a multiple of it; pass such requests to the fallback
*/