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staging: most: core: remove sysfs attr remove_link 

This patch removes the sysfs attribute remove_link, as it is not needed
anymore since the introduction of the configfs configuration interface.

Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
Link: https://lore.kernel.org/r/1574258738-12863-1-git-send-email-christian.gromm@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Christian Gromm 2019-11-20 15:05:38 +01:00 committed by Greg Kroah-Hartman
parent 83072c35ee
commit 1637a947e6
1 changed files with 0 additions and 86 deletions
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86
drivers/staging/most/core.c
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@ -520,48 +520,6 @@ static ssize_t components_show(struct device_driver *drv, char *buf)
return offs;
}
/**
* split_string - parses buf and extracts ':' separated substrings.
*
* @buf: complete string from attribute 'add_channel'
* @a: storage for 1st substring (=interface name)
* @b: storage for 2nd substring (=channel name)
* @c: storage for 3rd substring (=component name)
* @d: storage optional 4th substring (=user defined name)
*
* Examples:
*
* Input: "mdev0:ch6:cdev:my_channel\n" or
* "mdev0:ch6:cdev:my_channel"
*
* Output: *a -> "mdev0", *b -> "ch6", *c -> "cdev" *d -> "my_channel"
*
* Input: "mdev1:ep81:cdev\n"
* Output: *a -> "mdev1", *b -> "ep81", *c -> "cdev" *d -> ""
*
* Input: "mdev1:ep81"
* Output: *a -> "mdev1", *b -> "ep81", *c -> "cdev" *d == NULL
*/
static int split_string(char *buf, char **a, char **b, char **c, char **d)
{
*a = strsep(&buf, ":");
if (!*a)
return -EIO;
*b = strsep(&buf, ":\n");
if (!*b)
return -EIO;
*c = strsep(&buf, ":\n");
if (!*c)
return -EIO;
if (d)
*d = strsep(&buf, ":\n");
return 0;
}
/**
* get_channel - get pointer to channel
* @mdev: name of the device interface
@ -723,48 +681,6 @@ int most_add_link(char *mdev, char *mdev_ch, char *comp_name, char *link_name,
return link_channel_to_component(c, comp, link_name, comp_param);
}
/**
* remove_link_store - store function for remove_link attribute
* @drv: device driver
* @buf: buffer
* @len: buffer length
*
* Example:
* echo "mdev0:ep81" >remove_link
*/
static ssize_t remove_link_store(struct device_driver *drv,
const char *buf,
size_t len)
{
struct most_channel *c;
struct core_component *comp;
char buffer[STRING_SIZE];
char *mdev;
char *mdev_ch;
char *comp_name;
int ret;
size_t max_len = min_t(size_t, len + 1, STRING_SIZE);
strlcpy(buffer, buf, max_len);
ret = split_string(buffer, &mdev, &mdev_ch, &comp_name, NULL);
if (ret)
return ret;
comp = match_component(comp_name);
if (!comp)
return -ENODEV;
c = get_channel(mdev, mdev_ch);
if (!c)
return -ENODEV;
if (comp->disconnect_channel(c->iface, c->channel_id))
return -EIO;
if (c->pipe0.comp == comp)
c->pipe0.comp = NULL;
if (c->pipe1.comp == comp)
c->pipe1.comp = NULL;
return len;
}
int most_remove_link(char *mdev, char *mdev_ch, char *comp_name)
{
struct most_channel *c;
@ -790,12 +706,10 @@ int most_remove_link(char *mdev, char *mdev_ch, char *comp_name)
static DRIVER_ATTR_RO(links);
static DRIVER_ATTR_RO(components);
static DRIVER_ATTR_WO(remove_link);
static struct attribute *mc_attrs[] = {
DRV_ATTR(links),
DRV_ATTR(components),
DRV_ATTR(remove_link),
NULL,
};