linux-kernel - [PATCH review for 4.9 28/50] mtd: nand: sunxi: Fix the non-polling case in sunxi_nfc_wait

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Date:   Sat, 7 Oct 2017 22:36:52 +0000
From:   "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Cc:     Boris Brezillon <boris.brezillon@...e-electrons.com>,
        "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com>
Subject: [PATCH review for 4.9 28/50] mtd: nand: sunxi: Fix the non-polling
 case in sunxi_nfc_wait_events()

From: Boris Brezillon <boris.brezillon@...e-electrons.com>

[ Upstream commit 19649e2c16fbc94b664f7074ec4fa9f15292fdce ]

wait_for_completion_timeout() returns 0 if a timeout occurred, 1
otherwise. Fix the sunxi_nfc_wait_events() accordingly.

Signed-off-by: Boris Brezillon <boris.brezillon@...e-electrons.com>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
---
 drivers/mtd/nand/sunxi_nand.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/mtd/nand/sunxi_nand.c b/drivers/mtd/nand/sunxi_nand.c
index 8b8470c4e6d0..f9b2a771096b 100644
--- a/drivers/mtd/nand/sunxi_nand.c
+++ b/drivers/mtd/nand/sunxi_nand.c
@@ -320,6 +320,10 @@ static int sunxi_nfc_wait_events(struct sunxi_nfc *nfc, u32 events,
 
 		ret = wait_for_completion_timeout(&nfc->complete,
 						msecs_to_jiffies(timeout_ms));
+		if (!ret)
+			ret = -ETIMEDOUT;
+		else
+			ret = 0;
 
 		writel(0, nfc->regs + NFC_REG_INT);
 	} else {
-- 
2.11.0