linux-kernel - [PATCH] dmaengine: ti: k3-udma: fix -Wenum-conversion warning

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Message-Id: <20201026160123.3704531-1-arnd@kernel.org>
Date:   Mon, 26 Oct 2020 17:01:15 +0100
From:   Arnd Bergmann <arnd@...nel.org>
To:     Vinod Koul <vkoul@...nel.org>,
        Peter Ujfalusi <peter.ujfalusi@...com>,
        Grygorii Strashko <grygorii.strashko@...com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Dan Williams <dan.j.williams@...el.com>,
        Yu Kuai <yukuai3@...wei.com>, dmaengine@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] dmaengine: ti: k3-udma: fix -Wenum-conversion warning

From: Arnd Bergmann <arnd@...db.de>

gcc warns about a mismatch argument type when passing
'false' into a function that expects an enum:

drivers/dma/ti/k3-udma-private.c: In function 'xudma_tchan_get':
drivers/dma/ti/k3-udma-private.c:86:34: warning: implicit conversion from 'enum <anonymous>' to 'enum udma_tp_level' [-Wenum-conversion]
  86 |  return __udma_reserve_##res(ud, false, id);   \
     |                                  ^~~~~
drivers/dma/ti/k3-udma-private.c:95:1: note: in expansion of macro 'XUDMA_GET_PUT_RESOURCE'
   95 | XUDMA_GET_PUT_RESOURCE(tchan);
      | ^~~~~~~~~~~~~~~~~~~~~~

In this case, false has the same numerical value as
UDMA_TP_NORMAL, so passing that is most likely the correct
way to avoid the warning without changing the behavior.

Fixes: d70241913413 ("dmaengine: ti: k3-udma: Add glue layer for non DMAengine users")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/dma/ti/k3-udma-private.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/ti/k3-udma-private.c b/drivers/dma/ti/k3-udma-private.c
index aa24e554f7b4..8563a392f30b 100644
--- a/drivers/dma/ti/k3-udma-private.c
+++ b/drivers/dma/ti/k3-udma-private.c
@@ -83,7 +83,7 @@ EXPORT_SYMBOL(xudma_rflow_is_gp);
 #define XUDMA_GET_PUT_RESOURCE(res)					\
 struct udma_##res *xudma_##res##_get(struct udma_dev *ud, int id)	\
 {									\
-	return __udma_reserve_##res(ud, false, id);			\
+	return __udma_reserve_##res(ud, UDMA_TP_NORMAL, id);		\
 }									\
 EXPORT_SYMBOL(xudma_##res##_get);					\
 									\
-- 
2.27.0