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ALSA: usb-audio: Convert the last strlcpy() usage 

The last remaining usage of strlcpy() in USB-audio driver is the setup
of the card longname string.  Basically we need to know whether any
non-empty string is set or not, and no real length is needed.
Refactor the code and use strscpy() instead.  After this change,
strlcpy() is gone from all sound/* code.

Link: https://lore.kernel.org/r/20210115100437.20906-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2021-01-15 11:04:37 +01:00
parent e8afdfdc81
commit 42ef170d57
1 changed files with 5 additions and 6 deletions
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11
sound/usb/card.c
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@ -514,18 +514,17 @@ static void usb_audio_make_longname(struct usb_device *dev,
s = preset->vendor_name;
else if (quirk && quirk->vendor_name)
s = quirk->vendor_name;
*card->longname = 0;
if (s && *s) {
len = strlcpy(card->longname, s, sizeof(card->longname));
strscpy(card->longname, s, sizeof(card->longname));
} else {
/* retrieve the vendor and device strings as longname */
if (dev->descriptor.iManufacturer)
len = usb_string(dev, dev->descriptor.iManufacturer,
card->longname, sizeof(card->longname));
else
len = 0;
usb_string(dev, dev->descriptor.iManufacturer,
card->longname, sizeof(card->longname));
/* we don't really care if there isn't any vendor string */
}
if (len > 0) {
if (*card->longname) {
strim(card->longname);
if (*card->longname)
strlcat(card->longname, " ", sizeof(card->longname));