Patch "i2c: gxp: fix build failure without CONFIG_I2C_SLAVE" has been added to the 6.3-stable tree

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This is a note to let you know that I've just added the patch titled

    i2c: gxp: fix build failure without CONFIG_I2C_SLAVE

to the 6.3-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     i2c-gxp-fix-build-failure-without-config_i2c_slave.patch
and it can be found in the queue-6.3 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit ef7881f382b1c2c70beef81ad14175c1941dc6ea
Author: Arnd Bergmann <arnd@xxxxxxxx>
Date:   Mon Apr 3 09:49:13 2023 +0200

    i2c: gxp: fix build failure without CONFIG_I2C_SLAVE
    
    [ Upstream commit 5d388143fa6c351d985ffd23ea50c91c8839141b ]
    
    The gxp_i2c_slave_irq_handler() is hidden in an #ifdef, but the
    caller uses an IS_ENABLED() check:
    
    drivers/i2c/busses/i2c-gxp.c: In function 'gxp_i2c_irq_handler':
    drivers/i2c/busses/i2c-gxp.c:467:29: error: implicit declaration of function 'gxp_i2c_slave_irq_handler'; did you mean 'gxp_i2c_irq_handler'? [-Werror=implicit-function-declaration]
    
    It has to consistently use one method or the other to avoid warnings,
    so move to IS_ENABLED() here for readability and build coverage, and
    move the #ifdef in linux/i2c.h to allow building it as dead code.
    
    Fixes: 4a55ed6f89f5 ("i2c: Add GXP SoC I2C Controller")
    Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
    Reviewed-by: Nick Hawkins <nick.hawkins@xxxxxxx>
    Signed-off-by: Wolfram Sang <wsa@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/i2c/busses/i2c-gxp.c b/drivers/i2c/busses/i2c-gxp.c
index d4b55d989a268..8ea3fb5e4c7f7 100644
--- a/drivers/i2c/busses/i2c-gxp.c
+++ b/drivers/i2c/busses/i2c-gxp.c
@@ -353,7 +353,6 @@ static void gxp_i2c_chk_data_ack(struct gxp_i2c_drvdata *drvdata)
 	writew(value, drvdata->base + GXP_I2CMCMD);
 }
 
-#if IS_ENABLED(CONFIG_I2C_SLAVE)
 static bool gxp_i2c_slave_irq_handler(struct gxp_i2c_drvdata *drvdata)
 {
 	u8 value;
@@ -437,7 +436,6 @@ static bool gxp_i2c_slave_irq_handler(struct gxp_i2c_drvdata *drvdata)
 
 	return true;
 }
-#endif
 
 static irqreturn_t gxp_i2c_irq_handler(int irq, void *_drvdata)
 {
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 5ba89663ea865..13a1ce38cb0c5 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -385,7 +385,6 @@ static inline void i2c_set_clientdata(struct i2c_client *client, void *data)
 
 /* I2C slave support */
 
-#if IS_ENABLED(CONFIG_I2C_SLAVE)
 enum i2c_slave_event {
 	I2C_SLAVE_READ_REQUESTED,
 	I2C_SLAVE_WRITE_REQUESTED,
@@ -396,9 +395,10 @@ enum i2c_slave_event {
 
 int i2c_slave_register(struct i2c_client *client, i2c_slave_cb_t slave_cb);
 int i2c_slave_unregister(struct i2c_client *client);
-bool i2c_detect_slave_mode(struct device *dev);
 int i2c_slave_event(struct i2c_client *client,
 		    enum i2c_slave_event event, u8 *val);
+#if IS_ENABLED(CONFIG_I2C_SLAVE)
+bool i2c_detect_slave_mode(struct device *dev);
 #else
 static inline bool i2c_detect_slave_mode(struct device *dev) { return false; }
 #endif



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