linux-kernel - [PATCH 4/8] lib/zlib: Fix DFLTCC ignoring flush modes when avail

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Date:   Thu, 26 Jan 2023 14:14:24 +0100
From:   Mikhail Zaslonko <zaslonko@...ux.ibm.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Ilya Leoshkevich <iii@...ux.ibm.com>,
        Mikhail Zaslonko <zaslonko@...ux.ibm.com>
Subject: [PATCH 4/8] lib/zlib: Fix DFLTCC ignoring flush modes when avail_in == 0

This commit is based on:
  https://github.com/zlib-ng/zlib-ng/commit/40acb3f

Signed-off-by: Mikhail Zaslonko <zaslonko@...ux.ibm.com>
Acked-by: Ilya Leoshkevich <iii@...ux.ibm.com>
---
 lib/zlib_dfltcc/dfltcc_deflate.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/zlib_dfltcc/dfltcc_deflate.c b/lib/zlib_dfltcc/dfltcc_deflate.c
index dc85ec890163..211d344710d5 100644
--- a/lib/zlib_dfltcc/dfltcc_deflate.c
+++ b/lib/zlib_dfltcc/dfltcc_deflate.c
@@ -142,7 +142,8 @@ int dfltcc_deflate(
         /* Clear history. */
         if (flush == Z_FULL_FLUSH)
             param->hl = 0;
-        *result = need_more;
+        /* Trigger block post-processing if necessary. */
+        *result = no_flush ? need_more : block_done;
         return 1;
     }
 
-- 
2.34.1