diff options
Diffstat (limited to 'drivers/usb/gadget/function/f_midi.c')
| -rw-r--r-- | drivers/usb/gadget/function/f_midi.c | 48 |
1 files changed, 46 insertions, 2 deletions
diff --git a/drivers/usb/gadget/function/f_midi.c b/drivers/usb/gadget/function/f_midi.c index 71a1a26e85c7..fddf539008a9 100644 --- a/drivers/usb/gadget/function/f_midi.c +++ b/drivers/usb/gadget/function/f_midi.c @@ -1097,7 +1097,7 @@ static ssize_t f_midi_opts_##name##_show(struct config_item *item, char *page) \ int result; \ \ mutex_lock(&opts->lock); \ - result = sprintf(page, "%d\n", opts->name); \ + result = sprintf(page, "%u\n", opts->name); \ mutex_unlock(&opts->lock); \ \ return result; \ @@ -1134,7 +1134,51 @@ end: \ \ CONFIGFS_ATTR(f_midi_opts_, name); -F_MIDI_OPT(index, true, SNDRV_CARDS); +#define F_MIDI_OPT_SIGNED(name, test_limit, limit) \ +static ssize_t f_midi_opts_##name##_show(struct config_item *item, char *page) \ +{ \ + struct f_midi_opts *opts = to_f_midi_opts(item); \ + int result; \ + \ + mutex_lock(&opts->lock); \ + result = sprintf(page, "%d\n", opts->name); \ + mutex_unlock(&opts->lock); \ + \ + return result; \ +} \ + \ +static ssize_t f_midi_opts_##name##_store(struct config_item *item, \ + const char *page, size_t len) \ +{ \ + struct f_midi_opts *opts = to_f_midi_opts(item); \ + int ret; \ + s32 num; \ + \ + mutex_lock(&opts->lock); \ + if (opts->refcnt > 1) { \ + ret = -EBUSY; \ + goto end; \ + } \ + \ + ret = kstrtos32(page, 0, &num); \ + if (ret) \ + goto end; \ + \ + if (test_limit && num > limit) { \ + ret = -EINVAL; \ + goto end; \ + } \ + opts->name = num; \ + ret = len; \ + \ +end: \ + mutex_unlock(&opts->lock); \ + return ret; \ +} \ + \ +CONFIGFS_ATTR(f_midi_opts_, name); + +F_MIDI_OPT_SIGNED(index, true, SNDRV_CARDS); F_MIDI_OPT(buflen, false, 0); F_MIDI_OPT(qlen, false, 0); F_MIDI_OPT(in_ports, true, MAX_PORTS); |