tree 32acf5044fe5553a9d43694e09cdd9c8da2ac1db
parent 30326083f8f85c14272183d1d2a26484a84b9bff
author Takashi Iwai <tiwai@suse.de> 1691595124 +0200
committer Takashi Iwai <tiwai@suse.de> 1692164968 +0200

ALSA: core: Unify card allocation and free with and without devres

We implemented devres for allocating and releasing the card memory
itself, but this can be problematic when the delayed kobj release is
used.  Above all, the conditional kfree() is rather error-prone.

This patch changes the mechanism for snd_devm_card_new().  Now it
allocates a devres pointer for the card object that stores the result
of snd_card_new().  In return, at devres release, it unreferences the
card_dev refcount, so that we can use card_dev's release as the sole
point for releasing the memory at the very last.

Signed-off-by: Takashi Iwai <tiwai@suse.de>