linux-kernel - [PATCH AUTOSEL 4.19 28/68] net: ks8851: Reassert reset pin if chip ID check fails

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Message-Id: <20190422194516.11634-28-sashal@kernel.org>
Date:   Mon, 22 Apr 2019 15:44:36 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Lukas Wunner <lukas@...ner.de>, Frank Pavlic <f.pavlic@...bus.de>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Nishanth Menon <nm@...com>,
        "David S . Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>, netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 4.19 28/68] net: ks8851: Reassert reset pin if chip ID check fails

From: Lukas Wunner <lukas@...ner.de>

[ Upstream commit 761cfa979a0c177d6c2d93ef5585cd79ae49a7d5 ]

Commit 73fdeb82e963 ("net: ks8851: Add optional vdd_io regulator and
reset gpio") amended the ks8851 driver to briefly assert the chip's
reset pin on probe. It also amended the probe routine's error path to
reassert the reset pin if a subsequent initialization step fails.

However the commit misplaced reassertion of the reset pin in the error
path such that it is not performed if the check of the Chip ID and
Enable Register (CIDER) fails. The error path is therefore slightly
asymmetrical to the probe routine's body. Fix it.

Signed-off-by: Lukas Wunner <lukas@...ner.de>
Cc: Frank Pavlic <f.pavlic@...bus.de>
Cc: Stephen Boyd <sboyd@...eaurora.org>
Cc: Nishanth Menon <nm@...com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin (Microsoft) <sashal@...nel.org>
---
 drivers/net/ethernet/micrel/ks8851.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/micrel/ks8851.c b/drivers/net/ethernet/micrel/ks8851.c
index a93f8e842c07..1633fa5c709c 100644
--- a/drivers/net/ethernet/micrel/ks8851.c
+++ b/drivers/net/ethernet/micrel/ks8851.c
@@ -1554,9 +1554,9 @@ static int ks8851_probe(struct spi_device *spi)
 	free_irq(ndev->irq, ks);
 
 err_irq:
+err_id:
 	if (gpio_is_valid(gpio))
 		gpio_set_value(gpio, 0);
-err_id:
 	regulator_disable(ks->vdd_reg);
 err_reg:
 	regulator_disable(ks->vdd_io);
-- 
2.19.1