ALSA: intel_hdmi: Fix off-by-one error in __hdmi_lpe_audio_probe()

In __hdmi_lpe_audio_probe(), strscpy() is incorrectly called with the
length of the source string (excluding the NUL terminator) rather than
the size of the destination buffer. This results in one character less
being copied from 'card->shortname' to 'pcm->name'.

Use the destination buffer size instead to ensure the card name is
copied correctly.

Cc: [email protected]
Fixes: 75b1a8f ("ALSA: Convert strlcpy to strscpy when return value is unused")
Signed-off-by: Thorsten Blum <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>

Author: toblux

sound/x86/intel_hdmi_audio.c

@@ -1765,7 +1765,7 @@ static int __hdmi_lpe_audio_probe(struct platform_device *pdev)
 		/* setup private data which can be retrieved when required */
 		pcm->private_data = ctx;
 		pcm->info_flags = 0;
-		strscpy(pcm->name, card->shortname, strlen(card->shortname));
+		strscpy(pcm->name, card->shortname, sizeof(pcm->name));
 		/* setup the ops for playback */
 		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &had_pcm_ops);