linux-kernel - [PATCH 5.10 134/141] i2c: imx: If pm_runtime_get_sync() returned 1 device access is possible

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Date:   Mon, 26 Sep 2022 12:12:40 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Oleksij Rempel <o.rempel@...gutronix.de>,
        Wolfram Sang <wsa@...nel.org>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 134/141] i2c: imx: If pm_runtime_get_sync() returned 1 device access is possible

From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>

[ Upstream commit 085aacaa73163f4b8a89dec24ecb32cfacd34017 ]

pm_runtime_get_sync() returning 1 also means the device is powered. So
resetting the chip registers in .remove() is possible and should be
done.

Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Fixes: d98bdd3a5b50 ("i2c: imx: Make sure to unregister adapter on remove()")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Acked-by: Oleksij Rempel <o.rempel@...gutronix.de>
Signed-off-by: Wolfram Sang <wsa@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/i2c/busses/i2c-imx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c
index d3719df1c40d..be4ad516293b 100644
--- a/drivers/i2c/busses/i2c-imx.c
+++ b/drivers/i2c/busses/i2c-imx.c
@@ -1289,7 +1289,7 @@ static int i2c_imx_remove(struct platform_device *pdev)
 	if (i2c_imx->dma)
 		i2c_imx_dma_free(i2c_imx);
 
-	if (ret == 0) {
+	if (ret >= 0) {
 		/* setup chip registers to defaults */
 		imx_i2c_write_reg(0, i2c_imx, IMX_I2C_IADR);
 		imx_i2c_write_reg(0, i2c_imx, IMX_I2C_IFDR);
-- 
2.35.1