linux-kernel - [PATCH 4.9 45/67] mtd: nand: sunxi: Fix the non-polling case in sunxi_nfc_wait

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Date:   Mon,  6 Nov 2017 10:44:08 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Sasha Levin <alexander.levin@...izon.com>
Subject: [PATCH 4.9 45/67] mtd: nand: sunxi: Fix the non-polling case in sunxi_nfc_wait_events()

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/mtd/nand/sunxi_nand.c |    4 ++++
 1 file changed, 4 insertions(+)

--- 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
 
 		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 {