From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Date: Wed, 15 Feb 2023 12:08:45 +0100
Subject: [PATCH] mtd: nand: mxic-ecc: Fix
 mxic_ecc_data_xfer_wait_for_completion() when irq is used
References: bsc#1012628
Patch-mainline: 6.2.10
Git-commit: 75dce6a941e3f16c3b4878c8b2f46d5d07c619ce

[ Upstream commit 75dce6a941e3f16c3b4878c8b2f46d5d07c619ce ]

wait_for_completion_timeout() and readl_poll_timeout() don't handle their
return value the same way.

wait_for_completion_timeout() returns 0 on time out (and >0 in all other
cases)
readl_poll_timeout() returns 0 on success and -ETIMEDOUT upon a timeout.

In order for the error handling path to work in both cases, the logic
against wait_for_completion_timeout() needs to be inverted.

Fixes: 48e6633a9fa2 ("mtd: nand: mxic-ecc: Add Macronix external ECC engine support")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/beddbc374557e44ceec897e68c4a5d12764ddbb9.1676459308.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/mtd/nand/ecc-mxic.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mtd/nand/ecc-mxic.c b/drivers/mtd/nand/ecc-mxic.c
index 8afdca73..6b487ffe 100644
--- a/drivers/mtd/nand/ecc-mxic.c
+++ b/drivers/mtd/nand/ecc-mxic.c
@@ -429,6 +429,7 @@ static int mxic_ecc_data_xfer_wait_for_completion(struct mxic_ecc_engine *mxic)
 		mxic_ecc_enable_int(mxic);
 		ret = wait_for_completion_timeout(&mxic->complete,
 						  msecs_to_jiffies(1000));
+		ret = ret ? 0 : -ETIMEDOUT;
 		mxic_ecc_disable_int(mxic);
 	} else {
 		ret = readl_poll_timeout(mxic->regs + INTRPT_STS, val,
-- 
2.35.3