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ALSA: x86: Fix potential crash at error path 

When LPE audio driver gets some error at probing, it may lead to a
crash because of canceling the pending work in hdmi_lpe_audio_free(),
since some of ports might be still not initialized.

For assuring the proper free of each port, initialize all ports at the
beginning of the probe.

Fixes: b4eb0d522f ("ALSA: x86: Split snd_intelhad into card and PCM specific structures")
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2018-02-28 08:46:00 +01:00
parent 350144069a
commit c77a6edb6d
1 changed files with 17 additions and 10 deletions
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27
sound/x86/intel_hdmi_audio.c
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@ -1751,6 +1751,7 @@ static int hdmi_lpe_audio_probe(struct platform_device *pdev)
{
struct snd_card *card;
struct snd_intelhad_card *card_ctx;
struct snd_intelhad *ctx;
struct snd_pcm *pcm;
struct intel_hdmi_lpe_audio_pdata *pdata;
int irq;
@ -1795,6 +1796,21 @@ static int hdmi_lpe_audio_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, card_ctx);
card_ctx->num_pipes = pdata->num_pipes;
card_ctx->num_ports = single_port ? 1 : pdata->num_ports;
for_each_port(card_ctx, port) {
ctx = &card_ctx->pcm_ctx[port];
ctx->card_ctx = card_ctx;
ctx->dev = card_ctx->dev;
ctx->port = single_port ? -1 : port;
ctx->pipe = -1;
spin_lock_init(&ctx->had_spinlock);
mutex_init(&ctx->mutex);
INIT_WORK(&ctx->hdmi_audio_wq, had_audio_wq);
}
dev_dbg(&pdev->dev, "%s: mmio_start = 0x%x, mmio_end = 0x%x\n",
__func__, (unsigned int)res_mmio->start,
(unsigned int)res_mmio->end);
@ -1827,18 +1843,9 @@ static int hdmi_lpe_audio_probe(struct platform_device *pdev)
card_ctx->num_ports = single_port ? 1 : pdata->num_ports;
for_each_port(card_ctx, port) {
struct snd_intelhad *ctx = &card_ctx->pcm_ctx[port];
int i;
ctx->card_ctx = card_ctx;
ctx->dev = card_ctx->dev;
ctx->port = single_port ? -1 : port;
ctx->pipe = -1;
spin_lock_init(&ctx->had_spinlock);
mutex_init(&ctx->mutex);
INIT_WORK(&ctx->hdmi_audio_wq, had_audio_wq);
ctx = &card_ctx->pcm_ctx[port];
ret = snd_pcm_new(card, INTEL_HAD, port, MAX_PB_STREAMS,
MAX_CAP_STREAMS, &pcm);
if (ret)