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| author | Takashi Iwai <tiwai@suse.de> | 2011-03-21 12:00:00 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2011-03-21 12:32:44 +0100 |
| commit | 3ffc1222bd2c30b0ef2d3a797b0e0070c7c61a98 (patch) | |
| tree | 0e14e12239866c3269665febb2e46ce928c0cd95 /sound/usb | |
| parent | 977a6ef3c0cb622b572fb8e2e5088dbe09521375 (diff) | |
| download | linux-3ffc1222bd2c30b0ef2d3a797b0e0070c7c61a98.tar.bz2 | |
ALSA: usb - Remove trailing spaces from USB card name strings
Some USB devices give trailing spaces in strings returned from
usb_string(). This confuses the automatic card-id creation, resulting
always in "default".
This patch fixes the behavior by removing trailing spaces.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb')
| -rw-r--r-- | sound/usb/card.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/sound/usb/card.c b/sound/usb/card.c index 40722f8711ad..a90662af2d6b 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -41,6 +41,7 @@ #include <linux/list.h> #include <linux/slab.h> #include <linux/string.h> +#include <linux/ctype.h> #include <linux/usb.h> #include <linux/moduleparam.h> #include <linux/mutex.h> @@ -283,6 +284,15 @@ static int snd_usb_audio_dev_free(struct snd_device *device) return snd_usb_audio_free(chip); } +static void remove_trailing_spaces(char *str) +{ + char *p; + + if (!*str) + return; + for (p = str + strlen(str) - 1; p >= str && isspace(*p); p--) + *p = 0; +} /* * create a chip instance and set its names. @@ -351,7 +361,7 @@ static int snd_usb_audio_create(struct usb_device *dev, int idx, snd_component_add(card, component); /* retrieve the device string as shortname */ - if (quirk && quirk->product_name) { + if (quirk && quirk->product_name && *quirk->product_name) { strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname)); } else { if (!dev->descriptor.iProduct || @@ -363,9 +373,10 @@ static int snd_usb_audio_create(struct usb_device *dev, int idx, USB_ID_PRODUCT(chip->usb_id)); } } + remove_trailing_spaces(card->shortname); /* retrieve the vendor and device strings as longname */ - if (quirk && quirk->vendor_name) { + if (quirk && quirk->vendor_name && *quirk->vendor_name) { len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname)); } else { if (dev->descriptor.iManufacturer) @@ -375,8 +386,11 @@ static int snd_usb_audio_create(struct usb_device *dev, int idx, len = 0; /* we don't really care if there isn't any vendor string */ } - if (len > 0) - strlcat(card->longname, " ", sizeof(card->longname)); + if (len > 0) { + remove_trailing_spaces(card->longname); + if (*card->longname) + strlcat(card->longname, " ", sizeof(card->longname)); + } strlcat(card->longname, card->shortname, sizeof(card->longname)); |