ASoC: Intel: avs: Set of functional fixes

Merge series from Cezary Rojewski <cezary.rojewski@intel.com>:

Medium range of fixes all avs-driver related. The most important fixes
lead the way:

1. For ASoC-hda codec driver, existing RPM manipulation in
hda_codec_probe_complete()'s error path is superfluous and leads to RPM
usage count underflow if the probe exists early e.g.: build-controls
operation fails.

2. Resolve deadlock when DSP-recovery is a consequence of SET_D0IX IPC.
The procedure handling IPC timeouts and EXCEPTION_CAUGHT notification
shall cancel any D0IX work before proceeding with DSP recovery. If
SET_D0IX called from delayed_work is the failing IPC the procedure will
deadlock.

3. LINK format (PPLCxFMT) calculation is incorrect.
HDAudio transfer types utilize SDxFMT for front-end (HOST) and PPLCxFMT
for back-end (LINK) side when setting up the stream. BE's
substream->runtime duplicates FE runtime so switch to using BE's
hw_params to address incorrect format values on the LINK side when FE
and BE formats differ.

Below three patches address problems found by Coverity static analyzer:
  ASoC: Intel: avs: Fix possible null-ptr-deref when initing hw
  ASoC: Intel: avs: Verify kcalloc() status when setting constraints
  ASoC: Intel: avs: Verify content returned by parse_int_array()

While unlikely in runtime, it's good to keep code resilient. The last
few patches are readability/cohesiveness improvements.

Author: broonie

sound/soc/codecs/hda.c

@@ -152,15 +152,15 @@ int hda_codec_probe_complete(struct hda_codec *codec)
 	ret = snd_hda_codec_build_controls(codec);
 	if (ret < 0) {
 		dev_err(&hdev->dev, "unable to create controls %d\n", ret);
-		goto out;
+		return ret;
 	}
 
 	/* Bus suspended codecs as it does not manage their pm */
 	pm_runtime_set_active(&hdev->dev);
 	/* rpm was forbidden in snd_hda_codec_device_new() */
 	snd_hda_codec_set_power_save(codec, 2000);
 	snd_hda_codec_register(codec);
-out:
+
 	/* Complement pm_runtime_get_sync(bus) in probe */
 	pm_runtime_mark_last_busy(bus->dev);
 	pm_runtime_put_autosuspend(bus->dev);

sound/soc/intel/avs/core.c

@@ -945,14 +945,14 @@ MODULE_AUTHOR("Cezary Rojewski <cezary.rojewski@intel.com>");
 MODULE_AUTHOR("Amadeusz Slawinski <amadeuszx.slawinski@linux.intel.com>");
 MODULE_DESCRIPTION("Intel cAVS sound driver");
 MODULE_LICENSE("GPL");
-MODULE_FIRMWARE("intel/skl/dsp_basefw.bin");
-MODULE_FIRMWARE("intel/apl/dsp_basefw.bin");
-MODULE_FIRMWARE("intel/cnl/dsp_basefw.bin");
-MODULE_FIRMWARE("intel/icl/dsp_basefw.bin");
-MODULE_FIRMWARE("intel/jsl/dsp_basefw.bin");
-MODULE_FIRMWARE("intel/lkf/dsp_basefw.bin");
-MODULE_FIRMWARE("intel/tgl/dsp_basefw.bin");
-MODULE_FIRMWARE("intel/ehl/dsp_basefw.bin");
-MODULE_FIRMWARE("intel/adl/dsp_basefw.bin");
-MODULE_FIRMWARE("intel/adl_n/dsp_basefw.bin");
+MODULE_FIRMWARE("intel/avs/skl/dsp_basefw.bin");
+MODULE_FIRMWARE("intel/avs/apl/dsp_basefw.bin");
+MODULE_FIRMWARE("intel/avs/cnl/dsp_basefw.bin");
+MODULE_FIRMWARE("intel/avs/icl/dsp_basefw.bin");
+MODULE_FIRMWARE("intel/avs/jsl/dsp_basefw.bin");
+MODULE_FIRMWARE("intel/avs/lkf/dsp_basefw.bin");
+MODULE_FIRMWARE("intel/avs/tgl/dsp_basefw.bin");
+MODULE_FIRMWARE("intel/avs/ehl/dsp_basefw.bin");
+MODULE_FIRMWARE("intel/avs/adl/dsp_basefw.bin");
+MODULE_FIRMWARE("intel/avs/adl_n/dsp_basefw.bin");
 MODULE_FIRMWARE("intel/fcl/dsp_basefw.bin");

sound/soc/intel/avs/debugfs.c

@@ -373,14 +373,18 @@ static ssize_t trace_control_write(struct file *file, const char __user *from, s
 		return ret;
 
 	num_elems = *array;
-	resource_mask = array[1];
+	if (!num_elems) {
+		ret = -EINVAL;
+		goto free_array;
+	}
 
 	/*
 	 * Disable if just resource mask is provided - no log priority flags.
 	 *
 	 * Enable input format:   mask, prio1, .., prioN
 	 * Where 'N' equals number of bits set in the 'mask'.
 	 */
+	resource_mask = array[1];
 	if (num_elems == 1) {
 		ret = disable_logs(adev, resource_mask);
 	} else {

sound/soc/intel/avs/ipc.c

@@ -169,7 +169,9 @@ static void avs_dsp_exception_caught(struct avs_dev *adev, union avs_notify_msg
 
 	dev_crit(adev->dev, "communication severed, rebooting dsp..\n");
 
-	cancel_delayed_work_sync(&ipc->d0ix_work);
+	/* Avoid deadlock as the exception may be the response to SET_D0IX. */
+	if (current_work() != &ipc->d0ix_work.work)
+		cancel_delayed_work_sync(&ipc->d0ix_work);
 	ipc->in_d0ix = false;
 	/* Re-enabled on recovery completion. */
 	pm_runtime_disable(adev->dev);

sound/soc/intel/avs/loader.c

@@ -9,6 +9,7 @@
 #include <linux/firmware.h>
 #include <linux/module.h>
 #include <linux/slab.h>
+#include <linux/string.h>
 #include <sound/hdaudio.h>
 #include <sound/hdaudio_ext.h>
 #include "avs.h"

sound/soc/intel/avs/path.c

@@ -134,6 +134,8 @@ int avs_path_set_constraint(struct avs_dev *adev, struct avs_tplg_path_template
 	rlist = kcalloc(i, sizeof(*rlist), GFP_KERNEL);
 	clist = kcalloc(i, sizeof(*clist), GFP_KERNEL);
 	slist = kcalloc(i, sizeof(*slist), GFP_KERNEL);
+	if (!rlist || !clist || !slist)
+		return -ENOMEM;
 
 	i = 0;
 	list_for_each_entry(path_template, &template->path_list, node) {

sound/soc/intel/avs/pcm.c

@@ -83,10 +83,8 @@ void avs_period_elapsed(struct snd_pcm_substream *substream)
 static int hw_rule_param_size(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule);
 static int avs_hw_constraints_init(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
 {
-	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	struct snd_pcm_hw_constraint_list *r, *c, *s;
-	struct avs_tplg_path_template *template;
 	struct avs_dma_data *data;
 	int ret;
 
@@ -99,8 +97,7 @@ static int avs_hw_constraints_init(struct snd_pcm_substream *substream, struct s
 	c = &(data->channels_list);
 	s = &(data->sample_bits_list);
 
-	template = avs_dai_find_path_template(dai, !rtd->dai_link->no_pcm, substream->stream);
-	ret = avs_path_set_constraint(data->adev, template, r, c, s);
+	ret = avs_path_set_constraint(data->adev, data->template, r, c, s);
 	if (ret <= 0)
 		return ret;
 
@@ -450,24 +447,26 @@ static int avs_dai_hda_be_hw_free(struct snd_pcm_substream *substream, struct sn
 
 static int avs_dai_hda_be_prepare(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
 {
-	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_soc_pcm_runtime *be = snd_soc_substream_to_rtd(substream);
 	const struct snd_soc_pcm_stream *stream_info;
 	struct hdac_ext_stream *link_stream;
+	const struct snd_pcm_hw_params *p;
 	struct avs_dma_data *data;
 	unsigned int format_val;
 	unsigned int bits;
 	int ret;
 
 	data = snd_soc_dai_get_dma_data(dai, substream);
 	link_stream = data->link_stream;
+	p = &be->dpcm[substream->stream].hw_params;
 
 	if (link_stream->link_prepared)
 		return 0;
 
 	stream_info = snd_soc_dai_get_pcm_stream(dai, substream->stream);
-	bits = snd_hdac_stream_format_bits(runtime->format, runtime->subformat,
+	bits = snd_hdac_stream_format_bits(params_format(p), params_subformat(p),
 					   stream_info->sig_bits);
-	format_val = snd_hdac_stream_format(runtime->channels, bits, runtime->rate);
+	format_val = snd_hdac_stream_format(params_channels(p), bits, params_rate(p));
 
 	snd_hdac_ext_stream_decouple(&data->adev->base.core, link_stream, true);
 	snd_hdac_ext_stream_reset(link_stream);