[PATCH v2 3/5] crypto: iaa - avoid counting fallback decompression bytes

Vinicius Costa Gomes <[email protected]> Wed, 05 Aug 2026 14:19:24 -0700
Newsgroups org.kernel.vger.linux-crypto,org.kernel.vger.dmaengine,org.kernel.vger.linux-kernel
Message-ID <[email protected]>
From: Giovanni Cabiddu <[email protected]>

When decompression falls back to deflate-generic after an analytics
error, the request no longer completes through IAA.

Move decompression byte accounting into the successful IAA completion
path in both the synchronous and asynchronous flows so decomp_bytes only
reflects bytes actually processed by IAA.

Signed-off-by: Giovanni Cabiddu <[email protected]>
Signed-off-by: Vinicius Costa Gomes <[email protected]>
Reviewed-by: Dave Jiang <[email protected]>
---
 drivers/crypto/intel/iaa/iaa_crypto_main.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/drivers/crypto/intel/iaa/iaa_crypto_main.c b/drivers/crypto/intel/iaa/iaa_crypto_main.c
index 904d9413ba18..9505ca23e6f3 100644
--- a/drivers/crypto/intel/iaa/iaa_crypto_main.c
+++ b/drivers/crypto/intel/iaa/iaa_crypto_main.c
@@ -1071,15 +1071,17 @@ static void iaa_desc_complete(struct idxd_desc *idxd_desc,
 		}
 	} else {
 		ctx->req->dlen = idxd_desc->iax_completion->output_size;
+
+		if (!ctx->compress) {
+			update_total_decomp_bytes_in(ctx->req->slen);
+			update_wq_decomp_bytes(iaa_wq->wq, ctx->req->slen);
+		}
 	}
 
 	/* Update stats */
 	if (ctx->compress) {
 		update_total_comp_bytes_out(ctx->req->dlen);
 		update_wq_comp_bytes(iaa_wq->wq, ctx->req->dlen);
-	} else {
-		update_total_decomp_bytes_in(ctx->req->slen);
-		update_wq_decomp_bytes(iaa_wq->wq, ctx->req->slen);
 	}
 
 	if (ctx->compress && compression_ctx->verify_compress) {
@@ -1462,16 +1464,16 @@ static int iaa_decompress(struct crypto_tfm *tfm, struct acomp_req *req,
 		}
 	} else {
 		req->dlen = idxd_desc->iax_completion->output_size;
+
+		/* Update stats */
+		update_total_decomp_bytes_in(slen);
+		update_wq_decomp_bytes(wq, slen);
 	}
 
 	*dlen = req->dlen;
 
 	if (!ctx->async_mode)
 		idxd_free_desc(wq, idxd_desc);
-
-	/* Update stats */
-	update_total_decomp_bytes_in(slen);
-	update_wq_decomp_bytes(wq, slen);
 out:
 	return ret;
 err:

-- 
2.55.0