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ASoC: core: remove artificial component and DAI name constraint 

Current fmt_single_name code limits maximum name of a DAI or component
to 32 bytes. On some systems corresponding device names might be longer
than that (e.g.
17300000.remoteproc:glink-edge:apr:apr-service@8:routing). This will
result in duplicate DAI/component names. Rewrite fmt_single_name() to
remove such length limitations.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20200827205100.1479331-1-dmitry.baryshkov@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Dmitry Baryshkov 2020-08-27 23:51:00 +03:00 committed by Mark Brown
parent 4b15c49719
commit 45dd9943fc
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 16 additions and 19 deletions
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35
sound/soc/soc-core.c
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@ -44,8 +44,6 @@
#define CREATE_TRACE_POINTS
#include <trace/events/asoc.h>
#define NAME_SIZE 32
static DEFINE_MUTEX(client_mutex);
static LIST_HEAD(component_list);
static LIST_HEAD(unbind_card_list);
@ -2231,13 +2229,14 @@ EXPORT_SYMBOL_GPL(snd_soc_unregister_card);
*/
static char *fmt_single_name(struct device *dev, int *id)
{
char *found, name[NAME_SIZE];
const char *devname = dev_name(dev);
char *found, *name;
int id1, id2;
if (dev_name(dev) == NULL)
if (devname == NULL)
return NULL;
strlcpy(name, dev_name(dev), NAME_SIZE);
name = devm_kstrdup(dev, devname, GFP_KERNEL);
/* are we a "%s.%d" name (platform and SPI components) */
found = strstr(name, dev->driver->name);
@ -2250,23 +2249,21 @@ static char *fmt_single_name(struct device *dev, int *id)
found[strlen(dev->driver->name)] = '\0';
}
/* I2C component devices are named "bus-addr" */
} else if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
/* create unique ID number from I2C addr and bus */
*id = ((id1 & 0xffff) << 16) + id2;
devm_kfree(dev, name);
/* sanitize component name for DAI link creation */
name = devm_kasprintf(dev, GFP_KERNEL, "%s.%s", dev->driver->name, devname);
} else {
/* I2C component devices are named "bus-addr" */
if (sscanf(name, "%x-%x", &id1, &id2) == 2) {
char tmp[NAME_SIZE];
/* create unique ID number from I2C addr and bus */
*id = ((id1 & 0xffff) << 16) + id2;
/* sanitize component name for DAI link creation */
snprintf(tmp, NAME_SIZE, "%s.%s", dev->driver->name,
name);
strlcpy(name, tmp, NAME_SIZE);
} else
*id = 0;
*id = 0;
}
return devm_kstrdup(dev, name, GFP_KERNEL);
return name;
}
/*