qzfs-fix

patch

From 06cb8310a54a222437f5a84bbbe61111435a08bf Mon Sep 17 00:00:00 2001
From: Yanfei Guo <[email protected]>
Date: Fri, 18 Apr 2025 19:48:19 +0000
Subject: [PATCH] qat: wait for in-flight req to complete before remove session

reqs in session may be still in-flight after callback returns.
This results in session remove fail with message "There are %lu
requests pending". Adding a small loop to wait for the completion
of in-flight requests.
---
 module/os/linux/zfs/qat_crypt.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/module/os/linux/zfs/qat_crypt.c b/module/os/linux/zfs/qat_crypt.c
index 27965a36d..c55b33a94 100644
--- a/module/os/linux/zfs/qat_crypt.c
+++ b/module/os/linux/zfs/qat_crypt.c
@@ -73,6 +73,18 @@ symcallback(void *p_callback, CpaStatus status, const CpaCySymOp operation,
 	}
 }
 
+static void sym_session_wait_inflight_req(CpaCySymSessionCtx pSessionCtx)
+{
+    CpaBoolean sessionInUse = CPA_FALSE;
+
+    do
+    {
+        cpaCySymSessionInUse(pSessionCtx, &sessionInUse);
+    } while (sessionInUse);
+
+    return;
+}
+
 boolean_t
 qat_crypt_use_accel(size_t s_len)
 {
@@ -446,6 +458,8 @@ fail:
 	if (status != CPA_STATUS_SUCCESS)
 		QAT_STAT_BUMP(crypt_fails);
 
+	sym_session_wait_inflight_req(cy_session_ctx);
+
 	for (i = 0; i < in_page_num; i++)
 		kunmap(in_pages[i]);
 	for (i = 0; i < out_page_num; i++)
@@ -564,6 +578,8 @@ fail:
 	if (status != CPA_STATUS_SUCCESS)
 		QAT_STAT_BUMP(cksum_fails);
 
+	sym_session_wait_inflight_req(cy_session_ctx);
+
 	for (i = 0; i < page_num; i++)
 		kunmap(in_pages[i]);
 
-- 
2.43.0