ALSA: pcmtest: Fix leak at probe error

When an error happens at probe of pcmtest driver before
snd_card_register() succeeds, we have to release the card explicitly,
but it's not done, leading to a potential memory leak.

Also, pcmtest driver manages struct pcmtst object unnecessarily
complicatedly by a dynamic allocation and release.

This patch fixes and cleans up the resource management:
- Use card's private_data allocation for struct sndpcmtst at the card
  creation, which is released automatically together with the card
- Since the allocation of pcmtest is gone, snd_pcmtst_create() is
  rather pointless, so just directly calling snd_pcmtst_new_pcm()
- Use the new auto-clean mechanism to handle the error case at probe.
- Many release handlers became superfluous and dropped

In the end we got a good amount of code reduction.

Fixes: 315a3d57c64c ("ALSA: Implement the new Virtual PCM Test Driver")
Reported-by: Sashiko <sashiko-bot@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20261007172533.14667-3-tiwai@suse.de

0 files changed, 0 insertions, 0 deletions