sg_nents_for_len() returns an int which is negative in case of error.
Fixes: 472b04444cd3 ("crypto: keembay - Add Keem Bay OCS HCU driver")
Signed-off-by: Thomas Fourier <fourier.thomas@xxxxxxxxx>
---
drivers/crypto/intel/keembay/keembay-ocs-hcu-core.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/crypto/intel/keembay/keembay-ocs-hcu-core.c b/drivers/crypto/intel/keembay/keembay-ocs-hcu-core.c
index 8f9e21ced0fe..48281d882260 100644
--- a/drivers/crypto/intel/keembay/keembay-ocs-hcu-core.c
+++ b/drivers/crypto/intel/keembay/keembay-ocs-hcu-core.c
@@ -232,7 +232,7 @@ static int kmb_ocs_dma_prepare(struct ahash_request *req)
struct device *dev = rctx->hcu_dev->dev;
unsigned int remainder = 0;
unsigned int total;
- size_t nents;
+ int nents;
size_t count;
int rc;
int i;
@@ -253,6 +253,9 @@ static int kmb_ocs_dma_prepare(struct ahash_request *req)
/* Determine the number of scatter gather list entries to process. */
nents = sg_nents_for_len(req->src, rctx->sg_data_total - remainder);
+ if (nents < 0)
+ return nents;
+
/* If there are entries to process, map them. */
if (nents) {
rctx->sg_dma_nents = dma_map_sg(dev, req->src, nents,
--
2.43.0
