linux-kernel - [PATCH 5/7] [stable-4.19] i2c: aspeed: fix build warning

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Message-Id: <20181214221023.3878670-6-arnd@arndb.de>
Date:   Fri, 14 Dec 2018 23:10:10 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Brendan Higgins <brendanhiggins@...gle.com>,
        Joel Stanley <joel@....id.au>
Cc:     stable@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
        openbmc@...ts.ozlabs.org, linux-aspeed@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 5/7] [stable-4.19] i2c: aspeed: fix build warning

Upstream commit 3e9efc3299dd ("i2c: aspeed: Handle master/slave combined irq events
properly") reworked the interrupt handling and fixed a warning in the process:

drivers/i2c/busses/i2c-aspeed.c: In function 'aspeed_i2c_bus_irq':
drivers/i2c/busses/i2c-aspeed.c:567:1: error: label 'out' defined but not used [-Werror=unused-label]

The warning is still present in v4.19.8 and can be fixed either by applying
that original patch, or by adding a simple #ifdef.

Here, I choose the second simpler option as the original patch seems too
invasive for a stable backport.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/i2c/busses/i2c-aspeed.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-aspeed.c b/drivers/i2c/busses/i2c-aspeed.c
index a4f956c6d567..a19fbff16861 100644
--- a/drivers/i2c/busses/i2c-aspeed.c
+++ b/drivers/i2c/busses/i2c-aspeed.c
@@ -555,7 +555,7 @@ static irqreturn_t aspeed_i2c_bus_irq(int irq, void *dev_id)
 	spin_lock(&bus->lock);
 
 #if IS_ENABLED(CONFIG_I2C_SLAVE)
-	if (aspeed_i2c_slave_irq(bus)) {
+	if (IS_ENABLED(CONFIG_I2C_SLAVE) && aspeed_i2c_slave_irq(bus)) {
 		dev_dbg(bus->dev, "irq handled by slave.\n");
 		ret = true;
 		goto out;
@@ -564,7 +564,9 @@ static irqreturn_t aspeed_i2c_bus_irq(int irq, void *dev_id)
 
 	ret = aspeed_i2c_master_irq(bus);
 
+#if IS_ENABLED(CONFIG_I2C_SLAVE)
 out:
+#endif
 	spin_unlock(&bus->lock);
 	return ret ? IRQ_HANDLED : IRQ_NONE;
 }
-- 
2.20.0