[PATCH 2/2] ALSA:line6: remove unnecessary initialization to PODHD500X.

From: Hans P. MÃller Ebner
Date: Fri Jun 16 2017 - 14:14:43 EST


Body:
Remove Initialization from POD HD500X because it's not needed.
Every time the device is connected dmesg gives the following output: "receive length failed (error -11)".
To solve this problem, another flags is introduced (LINE6_CAP_CONTROL_INFO) and it is only used for PODX3 in: sysfs entries, call podhd_startup_finalize(pod) and disconnection.
With this patch the error disappear.

Signed-off-by: Hans P. Moller <hmoller@xxxxx>
---
sound/usb/line6/driver.h | 2 ++
sound/usb/line6/podhd.c | 12 +++++++-----
2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/sound/usb/line6/driver.h b/sound/usb/line6/driver.h
index a5c2e9a..dc97895 100644
--- a/sound/usb/line6/driver.h
+++ b/sound/usb/line6/driver.h
@@ -117,6 +117,8 @@ enum {
LINE6_CAP_IN_NEEDS_OUT = 1 << 3,
/* device uses raw MIDI via USB (data endpoints) */
LINE6_CAP_CONTROL_MIDI = 1 << 4,
+ /* device provides low-level information */
+ LINE6_CAP_CONTROL_INFO = 1 << 5,
};

/*
diff --git a/sound/usb/line6/podhd.c b/sound/usb/line6/podhd.c
index e389f92..49c034c 100644
--- a/sound/usb/line6/podhd.c
+++ b/sound/usb/line6/podhd.c
@@ -293,7 +293,7 @@ static void podhd_disconnect(struct usb_line6 *line6)
{
struct usb_line6_podhd *pod = (struct usb_line6_podhd *)line6;

- if (pod->line6.properties->capabilities & LINE6_CAP_CONTROL) {
+ if (pod->line6.properties->capabilities & LINE6_CAP_CONTROL_INFO) {
struct usb_interface *intf;

del_timer_sync(&pod->startup_timer);
@@ -333,7 +333,9 @@ static int podhd_init(struct usb_line6 *line6,
pod->line6.properties->ctrl_if, err);
return err;
}
-
+ }
+
+ if (pod->line6.properties->capabilities & LINE6_CAP_CONTROL_INFO) {
/* create sysfs entries: */
err = snd_card_add_dev_attr(line6->card, &podhd_dev_attr_group);
if (err < 0)
@@ -350,7 +352,7 @@ static int podhd_init(struct usb_line6 *line6,
return err;
}

- if (!(pod->line6.properties->capabilities & LINE6_CAP_CONTROL)) {
+ if (!(pod->line6.properties->capabilities & LINE6_CAP_CONTROL_INFO)) {
/* register USB audio system directly */
return podhd_startup_finalize(pod);
}
@@ -428,7 +430,7 @@ static const struct line6_properties podhd_properties_table[] = {
[LINE6_PODX3] = {
.id = "PODX3",
.name = "POD X3",
- .capabilities = LINE6_CAP_CONTROL
+ .capabilities = LINE6_CAP_CONTROL | LINE6_CAP_CONTROL_INFO
| LINE6_CAP_PCM | LINE6_CAP_HWMON | LINE6_CAP_IN_NEEDS_OUT,
.altsetting = 1,
.ep_ctrl_r = 0x81,
@@ -440,7 +442,7 @@ static const struct line6_properties podhd_properties_table[] = {
[LINE6_PODX3LIVE] = {
.id = "PODX3LIVE",
.name = "POD X3 LIVE",
- .capabilities = LINE6_CAP_CONTROL
+ .capabilities = LINE6_CAP_CONTROL | LINE6_CAP_CONTROL_INFO
| LINE6_CAP_PCM | LINE6_CAP_HWMON | LINE6_CAP_IN_NEEDS_OUT,
.altsetting = 1,
.ep_ctrl_r = 0x81,
--
2.7.4