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i2c: mux: use proper dev when removing "channel-X" symlinks

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Those symlinks are created for the mux_dev, so we need to remove it from
there. Currently, it breaks for muxes where the mux_dev is not the device
of the parent adapter like this:

[   78.234644] WARNING: CPU: 0 PID: 365 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x5c/0x78()
[   78.242438] sysfs: cannot create duplicate filename '/devices/platform/i2cbus@8/channel-0'

Remove confusing comments while we are here.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Fixes: c9449affad
Cc: stable@kernel.org
This commit is contained in:
Wolfram Sang 2015-04-23 10:29:09 +02:00 committed by Wolfram Sang
parent 4c8979b226
commit 133778482e
1 changed files with 5 additions and 3 deletions
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8
drivers/i2c/i2c-mux.c
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@ -32,8 +32,9 @@ struct i2c_mux_priv {
struct i2c_algorithm algo;
struct i2c_adapter *parent;
void *mux_priv; /* the mux chip/device */
u32 chan_id; /* the channel id */
struct device *mux_dev;
void *mux_priv;
u32 chan_id;
int (*select)(struct i2c_adapter *, void *mux_priv, u32 chan_id);
int (*deselect)(struct i2c_adapter *, void *mux_priv, u32 chan_id);
@ -119,6 +120,7 @@ struct i2c_adapter *i2c_add_mux_adapter(struct i2c_adapter *parent,
/* Set up private adapter data */
priv->parent = parent;
priv->mux_dev = mux_dev;
priv->mux_priv = mux_priv;
priv->chan_id = chan_id;
priv->select = select;
@ -203,7 +205,7 @@ void i2c_del_mux_adapter(struct i2c_adapter *adap)
char symlink_name[20];
snprintf(symlink_name, sizeof(symlink_name), "channel-%u", priv->chan_id);
sysfs_remove_link(&adap->dev.parent->kobj, symlink_name);
sysfs_remove_link(&priv->mux_dev->kobj, symlink_name);
sysfs_remove_link(&priv->adap.dev.kobj, "mux_device");
i2c_del_adapter(adap);