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ALSA: usb-audio: Use unsigned char for iface and altsettings fields 

Just for consistency, use unsigned char for iface and altsetting in
allover places.  Also rearrange the field positions of
snd_usb_endpiont and tidy up with some comments.

Tested-by: Keith Milner <kamilner@superlative.org>
Tested-by: Dylan Robinson <dylan_robinson@motu.com>
Link: https://lore.kernel.org/r/20201123085347.19667-35-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2020-11-23 09:53:40 +01:00
parent 53837b4ac2
commit 89fa3f686c
2 changed files with 8 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
sound/usb/card.h
View File

@ -16,7 +16,7 @@ struct audioformat {
unsigned int fmt_type; /* USB audio format type (1-3) */
unsigned int fmt_bits; /* number of significant bits */
unsigned int frame_size; /* samples per frame for non-audio */
int iface; /* interface number */
unsigned char iface; /* interface number */
unsigned char altsetting; /* corresponding alternate setting */
unsigned char altset_idx; /* array index of altenate setting */
unsigned char attributes; /* corresponding attributes of cs endpoint */
@ -63,7 +63,12 @@ struct snd_usb_endpoint {
atomic_t running; /* running status */
int ep_num; /* the referenced endpoint number */
int type; /* SND_USB_ENDPOINT_TYPE_* */
unsigned long flags;
unsigned char iface; /* interface number */
unsigned char altsetting; /* corresponding alternate setting */
unsigned char ep_idx; /* endpoint array index */
unsigned long flags; /* running bit flags */
void (*prepare_data_urb) (struct snd_usb_substream *subs,
struct urb *urb);
@ -112,8 +117,6 @@ struct snd_usb_endpoint {
unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */
unsigned char silence_value;
unsigned int stride;
int iface, altsetting;
unsigned char ep_idx; /* endpoint array index */
int skip_packets; /* quirks for devices to ignore the first n packets
in a stream */
bool implicit_fb_sync; /* syncs with implicit feedback */

2
sound/usb/endpoint.c
View File

@ -762,7 +762,7 @@ void snd_usb_endpoint_close(struct snd_usb_audio *chip,
ep->ep_num, ep->opened);
if (!--ep->opened) {
endpoint_set_interface(chip, ep, false);
ep->iface = -1;
ep->iface = 0;
ep->altsetting = 0;
ep->cur_audiofmt = NULL;
ep->cur_rate = 0;