/* * sam9x5_wm8731 -- SoC audio for AT91SAM9X5-based boards * that are using WM8731 as codec. * * Copyright (C) 2011 Atmel, * Nicolas Ferre * * Copyright (C) 2013 Paratronic, * Richard Genoud * * Based on sam9g20_wm8731.c by: * Sedji Gaouaou * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * */ #include #include #include #include #include #include #include #include #include #include "../codecs/wm8731.h" #include "atmel_ssc_dai.h" #define MCLK_RATE 12288000 #define DRV_NAME "sam9x5-snd-wm8731" struct sam9x5_drvdata { int ssc_id; }; /* * Logic for a wm8731 as connected on a at91sam9x5ek based board. */ static int sam9x5_wm8731_init(struct snd_soc_pcm_runtime *rtd) { struct snd_soc_dai *codec_dai = rtd->codec_dai; struct device *dev = rtd->dev; int ret; dev_dbg(dev, "ASoC: %s called\n", __func__); /* set the codec system clock for DAC and ADC */ ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, MCLK_RATE, SND_SOC_CLOCK_IN); if (ret < 0) { dev_err(dev, "ASoC: Failed to set WM8731 SYSCLK: %d\n", ret); return ret; } return 0; } /* * Audio paths on at91sam9x5ek board: * * |A| ------------> | | ---R----> Headphone Jack * |T| <----\ | WM | ---L--/ * |9| ---> CLK <--> | 8731 | <--R----- Line In Jack * |1| <------------ | | <--L--/ */ static const struct snd_soc_dapm_widget sam9x5_dapm_widgets[] = { SND_SOC_DAPM_HP("Headphone Jack", NULL), SND_SOC_DAPM_LINE("Line In Jack", NULL), }; static int sam9x5_wm8731_driver_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; struct device_node *codec_np, *cpu_np; struct snd_soc_card *card; struct snd_soc_dai_link *dai; struct sam9x5_drvdata *priv; int ret; if (!np) { dev_err(&pdev->dev, "No device node supplied\n"); return -EINVAL; } card = devm_kzalloc(&pdev->dev, sizeof(*card), GFP_KERNEL); priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); dai = devm_kzalloc(&pdev->dev, sizeof(*dai), GFP_KERNEL); if (!dai || !card || !priv) { ret = -ENOMEM; goto out; } snd_soc_card_set_drvdata(card, priv); card->dev = &pdev->dev; card->owner = THIS_MODULE; card->dai_link = dai; card->num_links = 1; card->dapm_widgets = sam9x5_dapm_widgets; card->num_dapm_widgets = ARRAY_SIZE(sam9x5_dapm_widgets); dai->name = "WM8731"; dai->stream_name = "WM8731 PCM"; dai->codec_dai_name = "wm8731-hifi"; dai->init = sam9x5_wm8731_init; dai->dai_fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM; ret = snd_soc_of_parse_card_name(card, "atmel,model"); if (ret) { dev_err(&pdev->dev, "atmel,model node missing\n"); goto out; } ret = snd_soc_of_parse_audio_routing(card, "atmel,audio-routing"); if (ret) { dev_err(&pdev->dev, "atmel,audio-routing node missing\n"); goto out; } codec_np = of_parse_phandle(np, "atmel,audio-codec", 0); if (!codec_np) { dev_err(&pdev->dev, "atmel,audio-codec node missing\n"); ret = -EINVAL; goto out; } dai->codec_of_node = codec_np; cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0); if (!cpu_np) { dev_err(&pdev->dev, "atmel,ssc-controller node missing\n"); ret = -EINVAL; goto out; } dai->cpu_of_node = cpu_np; dai->platform_of_node = cpu_np; priv->ssc_id = of_alias_get_id(cpu_np, "ssc"); ret = atmel_ssc_set_audio(priv->ssc_id); if (ret != 0) { dev_err(&pdev->dev, "ASoC: Failed to set SSC %d for audio: %d\n", ret, priv->ssc_id); goto out; } of_node_put(codec_np); of_node_put(cpu_np); ret = snd_soc_register_card(card); if (ret) { dev_err(&pdev->dev, "ASoC: Platform device allocation failed\n"); goto out_put_audio; } dev_dbg(&pdev->dev, "ASoC: %s ok\n", __func__); return ret; out_put_audio: atmel_ssc_put_audio(priv->ssc_id); out: return ret; } static int sam9x5_wm8731_driver_remove(struct platform_device *pdev) { struct snd_soc_card *card = platform_get_drvdata(pdev); struct sam9x5_drvdata *priv = card->drvdata; snd_soc_unregister_card(card); atmel_ssc_put_audio(priv->ssc_id); return 0; } static const struct of_device_id sam9x5_wm8731_of_match[] = { { .compatible = "atmel,sam9x5-wm8731-audio", }, {}, }; MODULE_DEVICE_TABLE(of, sam9x5_wm8731_of_match); static struct platform_driver sam9x5_wm8731_driver = { .driver = { .name = DRV_NAME, .of_match_table = of_match_ptr(sam9x5_wm8731_of_match), }, .probe = sam9x5_wm8731_driver_probe, .remove = sam9x5_wm8731_driver_remove, }; module_platform_driver(sam9x5_wm8731_driver); /* Module information */ MODULE_AUTHOR("Nicolas Ferre "); MODULE_AUTHOR("Richard Genoud "); MODULE_DESCRIPTION("ALSA SoC machine driver for AT91SAM9x5 - WM8731"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:" DRV_NAME); /fs/nfs/read.c?id=54791b276b4000b307339f269d3bf7db877d536f'>fs/nfs/read.c parent5d0e7705774dd412a465896d08d59a81a345c1e4 (diff)parent047487241ff59374fded8c477f21453681f5995c (diff)
Merge branch 'sparc64-non-resumable-user-error-recovery'
Liam R. Howlett says: ==================== sparc64: Recover from userspace non-resumable PIO & MEM errors A non-resumable error from userspace is able to cause a kernel panic or trap loop due to the setup and handling of the queued traps once in the kernel. This patch series addresses both of these issues. The queues are fixed by simply zeroing the memory before use. PIO errors from userspace will result in a SIGBUS being sent to the user process. The MEM errors form userspace will result in a SIGKILL and also cause the offending pages to be claimed so they are no longer used in future tasks. SIGKILL is used to ensure that the process does not try to coredump and result in an attempt to read the memory again from within kernel space. Although there is a HV call to scrub the memory (mem_scrub), there is no easy way to guarantee that the real memory address(es) are not used by other tasks. Clearing the error with mem_scrub would zero the memory and cause the other processes to proceed with bad data. The handling of other non-resumable errors remain unchanged and will cause a panic. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'fs/nfs/read.c')