diff mbox series

[v2,4/6] drivers: crypto: qce: common: Set data unit size to message length for AES XTS transformation

Message ID 20210112030545.669480-5-thara.gopinath@linaro.org (mailing list archive)
State Changes Requested
Delegated to: Herbert Xu
Headers show
Series Regression fixes/clean ups in the Qualcomm crypto engine driver | expand

Commit Message

Thara Gopinath Jan. 12, 2021, 3:05 a.m. UTC 
Set the register REG_ENCR_XTS_DU_SIZE to cryptlen for AES XTS
transformation. Anything else causes the engine to return back
wrong results.

Signed-off-by: Thara Gopinath <thara.gopinath@linaro.org>
---
 drivers/crypto/qce/common.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/drivers/crypto/qce/common.c b/drivers/crypto/qce/common.c
index a73db2a5637f..f7bc701a4aa2 100644
--- a/drivers/crypto/qce/common.c
+++ b/drivers/crypto/qce/common.c
@@ -295,15 +295,15 @@  static void qce_xtskey(struct qce_device *qce, const u8 *enckey,
 {
 	u32 xtskey[QCE_MAX_CIPHER_KEY_SIZE / sizeof(u32)] = {0};
 	unsigned int xtsklen = enckeylen / (2 * sizeof(u32));
-	unsigned int xtsdusize;
 
 	qce_cpu_to_be32p_array((__be32 *)xtskey, enckey + enckeylen / 2,
 			       enckeylen / 2);
 	qce_write_array(qce, REG_ENCR_XTS_KEY0, xtskey, xtsklen);
 
-	/* xts du size 512B */
-	xtsdusize = min_t(u32, QCE_SECTOR_SIZE, cryptlen);
-	qce_write(qce, REG_ENCR_XTS_DU_SIZE, xtsdusize);
+	/* Set data unit size to cryptlen. Anything else causes
+	 * crypto engine to return back incorrect results.
+	 */
+	qce_write(qce, REG_ENCR_XTS_DU_SIZE, cryptlen);
 }
 
 static int qce_setup_regs_skcipher(struct crypto_async_request *async_req,