Hi,
sorry for the lat response, as I've been traveling in the last weeks.
At Thu, 19 Sep 2013 22:53:02 +0100,
Russell King wrote:
>
> This code sequence is unsafe in modules:
>
> static u64 mask = DMA_BIT_MASK(something);
> ...
> if (!dev->dma_mask)
> dev->dma_mask = &mask;
>
> as if a module is reloaded, the mask will be pointing at the original
> module's mask address, and this can lead to oopses. Moreover, they
> all follow this with:
>
> if (!dev->coherent_dma_mask)
> dev->coherent_dma_mask = mask;
>
> where 'mask' is the same value as the statically defined mask, and this
> bypasses the architecture's check on whether the DMA mask is possible.
>
> Fix these issues by using the new dma_coerce_coherent_and_mask()
> function.
>
> Signed-off-by: Russell King <rmk+ker...@arm.linux.org.uk>
Applied with Mark's ack now.
BTW, sound/soc/fsl/imx-pcm-fiq.c wasn't covered by this patch, so I
fixed it, too.
Thanks!
Takashi
> ---
> sound/arm/pxa2xx-pcm.c | 9 +++------
> sound/soc/atmel/atmel-pcm.c | 11 ++++-------
> sound/soc/blackfin/bf5xx-ac97-pcm.c | 11 ++++-------
> sound/soc/blackfin/bf5xx-i2s-pcm.c | 10 ++++------
> sound/soc/davinci/davinci-pcm.c | 9 +++------
> sound/soc/fsl/fsl_dma.c | 9 +++------
> sound/soc/fsl/mpc5200_dma.c | 10 ++++------
> sound/soc/jz4740/jz4740-pcm.c | 12 ++++--------
> sound/soc/kirkwood/kirkwood-dma.c | 9 +++------
> sound/soc/nuc900/nuc900-pcm.c | 9 ++++-----
> sound/soc/omap/omap-pcm.c | 11 ++++-------
> sound/soc/pxa/pxa2xx-pcm.c | 11 ++++-------
> sound/soc/s6000/s6000-pcm.c | 9 +++------
> sound/soc/samsung/dma.c | 11 ++++-------
> sound/soc/samsung/idma.c | 11 ++++-------
> 15 files changed, 55 insertions(+), 97 deletions(-)
>
> diff --git a/sound/arm/pxa2xx-pcm.c b/sound/arm/pxa2xx-pcm.c
> index 69a2455..fb3b76f 100644
> --- a/sound/arm/pxa2xx-pcm.c
> +++ b/sound/arm/pxa2xx-pcm.c
> @@ -83,8 +83,6 @@ static struct snd_pcm_ops pxa2xx_pcm_ops = {
> .mmap = pxa2xx_pcm_mmap,
> };
>
> -static u64 pxa2xx_pcm_dmamask = 0xffffffff;
> -
> int pxa2xx_pcm_new(struct snd_card *card, struct pxa2xx_pcm_client *client,
> struct snd_pcm **rpcm)
> {
> @@ -100,10 +98,9 @@ int pxa2xx_pcm_new(struct snd_card *card, struct
> pxa2xx_pcm_client *client,
> pcm->private_data = client;
> pcm->private_free = pxa2xx_pcm_free_dma_buffers;
>
> - if (!card->dev->dma_mask)
> - card->dev->dma_mask = &pxa2xx_pcm_dmamask;
> - if (!card->dev->coherent_dma_mask)
> - card->dev->coherent_dma_mask = 0xffffffff;
> + ret = dma_coerce_mask_and_coherent_mask(card->dev, DMA_BIT_MASK(32));
> + if (ret)
> + goto out;
>
> if (play) {
> int stream = SNDRV_PCM_STREAM_PLAYBACK;
> diff --git a/sound/soc/atmel/atmel-pcm.c b/sound/soc/atmel/atmel-pcm.c
> index 3109db7..fbb87e3 100644
> --- a/sound/soc/atmel/atmel-pcm.c
> +++ b/sound/soc/atmel/atmel-pcm.c
> @@ -68,18 +68,15 @@ int atmel_pcm_mmap(struct snd_pcm_substream *substream,
> }
> EXPORT_SYMBOL_GPL(atmel_pcm_mmap);
>
> -static u64 atmel_pcm_dmamask = DMA_BIT_MASK(32);
> -
> int atmel_pcm_new(struct snd_soc_pcm_runtime *rtd)
> {
> struct snd_card *card = rtd->card->snd_card;
> struct snd_pcm *pcm = rtd->pcm;
> - int ret = 0;
> + int ret;
>
> - if (!card->dev->dma_mask)
> - card->dev->dma_mask = &atmel_pcm_dmamask;
> - if (!card->dev->coherent_dma_mask)
> - card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
> + ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
> + if (ret)
> + return ret;
>
> if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
> pr_debug("atmel-pcm: allocating PCM playback DMA buffer\n");
> diff --git a/sound/soc/blackfin/bf5xx-ac97-pcm.c
> b/sound/soc/blackfin/bf5xx-ac97-pcm.c
> index 53f8408..1d4c676 100644
> --- a/sound/soc/blackfin/bf5xx-ac97-pcm.c
> +++ b/sound/soc/blackfin/bf5xx-ac97-pcm.c
> @@ -415,19 +415,16 @@ static void bf5xx_pcm_free_dma_buffers(struct snd_pcm
> *pcm)
> }
> }
>
> -static u64 bf5xx_pcm_dmamask = DMA_BIT_MASK(32);
> -
> static int bf5xx_pcm_ac97_new(struct snd_soc_pcm_runtime *rtd)
> {
> struct snd_card *card = rtd->card->snd_card;
> struct snd_pcm *pcm = rtd->pcm;
> - int ret = 0;
> + int ret;
>
> pr_debug("%s enter\n", __func__);
> - if (!card->dev->dma_mask)
> - card->dev->dma_mask = &bf5xx_pcm_dmamask;
> - if (!card->dev->coherent_dma_mask)
> - card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
> + ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
> + if (ret)
> + return ret;
>
> if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
> ret = bf5xx_pcm_preallocate_dma_buffer(pcm,
> diff --git a/sound/soc/blackfin/bf5xx-i2s-pcm.c
> b/sound/soc/blackfin/bf5xx-i2s-pcm.c
> index 9cb4a80..2a5b434 100644
> --- a/sound/soc/blackfin/bf5xx-i2s-pcm.c
> +++ b/sound/soc/blackfin/bf5xx-i2s-pcm.c
> @@ -323,18 +323,16 @@ static struct snd_pcm_ops bf5xx_pcm_i2s_ops = {
> .silence = bf5xx_pcm_silence,
> };
>
> -static u64 bf5xx_pcm_dmamask = DMA_BIT_MASK(32);
> -
> static int bf5xx_pcm_i2s_new(struct snd_soc_pcm_runtime *rtd)
> {
> struct snd_card *card = rtd->card->snd_card;
> size_t size = bf5xx_pcm_hardware.buffer_bytes_max;
> + int ret;
>
> pr_debug("%s enter\n", __func__);
> - if (!card->dev->dma_mask)
> - card->dev->dma_mask = &bf5xx_pcm_dmamask;
> - if (!card->dev->coherent_dma_mask)
> - card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
> + ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
> + if (ret)
> + return ret;
>
> return snd_pcm_lib_preallocate_pages_for_all(rtd->pcm,
> SNDRV_DMA_TYPE_DEV, card->dev, size, size);
> diff --git a/sound/soc/davinci/davinci-pcm.c b/sound/soc/davinci/davinci-pcm.c
> index 8460edc..84a63c6 100644
> --- a/sound/soc/davinci/davinci-pcm.c
> +++ b/sound/soc/davinci/davinci-pcm.c
> @@ -844,18 +844,15 @@ static void davinci_pcm_free(struct snd_pcm *pcm)
> }
> }
>
> -static u64 davinci_pcm_dmamask = DMA_BIT_MASK(32);
> -
> static int davinci_pcm_new(struct snd_soc_pcm_runtime *rtd)
> {
> struct snd_card *card = rtd->card->snd_card;
> struct snd_pcm *pcm = rtd->pcm;
> int ret;
>
> - if (!card->dev->dma_mask)
> - card->dev->dma_mask = &davinci_pcm_dmamask;
> - if (!card->dev->coherent_dma_mask)
> - card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
> + ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
> + if (ret)
> + return ret;
>
> if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
> ret = davinci_pcm_preallocate_dma_buffer(pcm,
> diff --git a/sound/soc/fsl/fsl_dma.c b/sound/soc/fsl/fsl_dma.c
> index 9cc5c1f..f73c7ef 100644
> --- a/sound/soc/fsl/fsl_dma.c
> +++ b/sound/soc/fsl/fsl_dma.c
> @@ -298,14 +298,11 @@ static int fsl_dma_new(struct snd_soc_pcm_runtime *rtd)
> {
> struct snd_card *card = rtd->card->snd_card;
> struct snd_pcm *pcm = rtd->pcm;
> - static u64 fsl_dma_dmamask = DMA_BIT_MASK(36);
> int ret;
>
> - if (!card->dev->dma_mask)
> - card->dev->dma_mask = &fsl_dma_dmamask;
> -
> - if (!card->dev->coherent_dma_mask)
> - card->dev->coherent_dma_mask = fsl_dma_dmamask;
> + ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(36));
> + if (ret)
> + return ret;
>
> /* Some codecs have separate DAIs for playback and capture, so we
> * should allocate a DMA buffer only for the streams that are valid.
> diff --git a/sound/soc/fsl/mpc5200_dma.c b/sound/soc/fsl/mpc5200_dma.c
> index 2a847ca..8fcf224 100644
> --- a/sound/soc/fsl/mpc5200_dma.c
> +++ b/sound/soc/fsl/mpc5200_dma.c
> @@ -299,7 +299,6 @@ static struct snd_pcm_ops psc_dma_ops = {
> .hw_params = psc_dma_hw_params,
> };
>
> -static u64 psc_dma_dmamask = DMA_BIT_MASK(32);
> static int psc_dma_new(struct snd_soc_pcm_runtime *rtd)
> {
> struct snd_card *card = rtd->card->snd_card;
> @@ -307,15 +306,14 @@ static int psc_dma_new(struct snd_soc_pcm_runtime *rtd)
> struct snd_pcm *pcm = rtd->pcm;
> struct psc_dma *psc_dma = snd_soc_dai_get_drvdata(rtd->cpu_dai);
> size_t size = psc_dma_hardware.buffer_bytes_max;
> - int rc = 0;
> + int rc;
>
> dev_dbg(rtd->platform->dev, "psc_dma_new(card=%p, dai=%p, pcm=%p)\n",
> card, dai, pcm);
>
> - if (!card->dev->dma_mask)
> - card->dev->dma_mask = &psc_dma_dmamask;
> - if (!card->dev->coherent_dma_mask)
> - card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
> + rc = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
> + if (rc)
> + return rc;
>
> if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
> rc = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, pcm->card->dev,
> diff --git a/sound/soc/jz4740/jz4740-pcm.c b/sound/soc/jz4740/jz4740-pcm.c
> index 7100592..1d7ef28 100644
> --- a/sound/soc/jz4740/jz4740-pcm.c
> +++ b/sound/soc/jz4740/jz4740-pcm.c
> @@ -297,19 +297,15 @@ static void jz4740_pcm_free(struct snd_pcm *pcm)
> }
> }
>
> -static u64 jz4740_pcm_dmamask = DMA_BIT_MASK(32);
> -
> static int jz4740_pcm_new(struct snd_soc_pcm_runtime *rtd)
> {
> struct snd_card *card = rtd->card->snd_card;
> struct snd_pcm *pcm = rtd->pcm;
> - int ret = 0;
> -
> - if (!card->dev->dma_mask)
> - card->dev->dma_mask = &jz4740_pcm_dmamask;
> + int ret;
>
> - if (!card->dev->coherent_dma_mask)
> - card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
> + ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
> + if (ret)
> + return ret;
>
> if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
> ret = jz4740_pcm_preallocate_dma_buffer(pcm,
> diff --git a/sound/soc/kirkwood/kirkwood-dma.c
> b/sound/soc/kirkwood/kirkwood-dma.c
> index b238434..3814bb0 100644
> --- a/sound/soc/kirkwood/kirkwood-dma.c
> +++ b/sound/soc/kirkwood/kirkwood-dma.c
> @@ -59,8 +59,6 @@ static struct snd_pcm_hardware kirkwood_dma_snd_hw = {
> .fifo_size = 0,
> };
>
> -static u64 kirkwood_dma_dmamask = DMA_BIT_MASK(32);
> -
> static irqreturn_t kirkwood_dma_irq(int irq, void *dev_id)
> {
> struct kirkwood_dma_data *priv = dev_id;
> @@ -292,10 +290,9 @@ static int kirkwood_dma_new(struct snd_soc_pcm_runtime
> *rtd)
> struct snd_pcm *pcm = rtd->pcm;
> int ret;
>
> - if (!card->dev->dma_mask)
> - card->dev->dma_mask = &kirkwood_dma_dmamask;
> - if (!card->dev->coherent_dma_mask)
> - card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
> + ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
> + if (ret)
> + return ret;
>
> if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
> ret = kirkwood_dma_preallocate_dma_buffer(pcm,
> diff --git a/sound/soc/nuc900/nuc900-pcm.c b/sound/soc/nuc900/nuc900-pcm.c
> index c894ff0..f588ee4 100644
> --- a/sound/soc/nuc900/nuc900-pcm.c
> +++ b/sound/soc/nuc900/nuc900-pcm.c
> @@ -314,16 +314,15 @@ static void nuc900_dma_free_dma_buffers(struct snd_pcm
> *pcm)
> snd_pcm_lib_preallocate_free_for_all(pcm);
> }
>
> -static u64 nuc900_pcm_dmamask = DMA_BIT_MASK(32);
> static int nuc900_dma_new(struct snd_soc_pcm_runtime *rtd)
> {
> struct snd_card *card = rtd->card->snd_card;
> struct snd_pcm *pcm = rtd->pcm;
> + int ret;
>
> - if (!card->dev->dma_mask)
> - card->dev->dma_mask = &nuc900_pcm_dmamask;
> - if (!card->dev->coherent_dma_mask)
> - card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
> + ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
> + if (ret)
> + return ret;
>
> snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
> card->dev, 4 * 1024, (4 * 1024) - 1);
> diff --git a/sound/soc/omap/omap-pcm.c b/sound/soc/omap/omap-pcm.c
> index a11405d..b8fa986 100644
> --- a/sound/soc/omap/omap-pcm.c
> +++ b/sound/soc/omap/omap-pcm.c
> @@ -156,8 +156,6 @@ static struct snd_pcm_ops omap_pcm_ops = {
> .mmap = omap_pcm_mmap,
> };
>
> -static u64 omap_pcm_dmamask = DMA_BIT_MASK(64);
> -
> static int omap_pcm_preallocate_dma_buffer(struct snd_pcm *pcm,
> int stream)
> {
> @@ -202,12 +200,11 @@ static int omap_pcm_new(struct snd_soc_pcm_runtime *rtd)
> {
> struct snd_card *card = rtd->card->snd_card;
> struct snd_pcm *pcm = rtd->pcm;
> - int ret = 0;
> + int ret;
>
> - if (!card->dev->dma_mask)
> - card->dev->dma_mask = &omap_pcm_dmamask;
> - if (!card->dev->coherent_dma_mask)
> - card->dev->coherent_dma_mask = DMA_BIT_MASK(64);
> + ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(64));
> + if (ret)
> + return ret;
>
> if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
> ret = omap_pcm_preallocate_dma_buffer(pcm,
> diff --git a/sound/soc/pxa/pxa2xx-pcm.c b/sound/soc/pxa/pxa2xx-pcm.c
> index 806da27..d58b09f 100644
> --- a/sound/soc/pxa/pxa2xx-pcm.c
> +++ b/sound/soc/pxa/pxa2xx-pcm.c
> @@ -87,18 +87,15 @@ static struct snd_pcm_ops pxa2xx_pcm_ops = {
> .mmap = pxa2xx_pcm_mmap,
> };
>
> -static u64 pxa2xx_pcm_dmamask = DMA_BIT_MASK(32);
> -
> static int pxa2xx_soc_pcm_new(struct snd_soc_pcm_runtime *rtd)
> {
> struct snd_card *card = rtd->card->snd_card;
> struct snd_pcm *pcm = rtd->pcm;
> - int ret = 0;
> + int ret;
>
> - if (!card->dev->dma_mask)
> - card->dev->dma_mask = &pxa2xx_pcm_dmamask;
> - if (!card->dev->coherent_dma_mask)
> - card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
> + ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
> + if (ret)
> + return ret;
>
> if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
> ret = pxa2xx_pcm_preallocate_dma_buffer(pcm,
> diff --git a/sound/soc/s6000/s6000-pcm.c b/sound/soc/s6000/s6000-pcm.c
> index d0740a7..283620a 100644
> --- a/sound/soc/s6000/s6000-pcm.c
> +++ b/sound/soc/s6000/s6000-pcm.c
> @@ -444,8 +444,6 @@ static void s6000_pcm_free(struct snd_pcm *pcm)
> snd_pcm_lib_preallocate_free_for_all(pcm);
> }
>
> -static u64 s6000_pcm_dmamask = DMA_BIT_MASK(32);
> -
> static int s6000_pcm_new(struct snd_soc_pcm_runtime *runtime)
> {
> struct snd_card *card = runtime->card->snd_card;
> @@ -456,10 +454,9 @@ static int s6000_pcm_new(struct snd_soc_pcm_runtime
> *runtime)
> params = snd_soc_dai_get_dma_data(runtime->cpu_dai,
> pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream);
>
> - if (!card->dev->dma_mask)
> - card->dev->dma_mask = &s6000_pcm_dmamask;
> - if (!card->dev->coherent_dma_mask)
> - card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
> + res = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
> + if (res)
> + return res;
>
> if (params->dma_in) {
> s6dmac_disable_chan(DMA_MASK_DMAC(params->dma_in),
> diff --git a/sound/soc/samsung/dma.c b/sound/soc/samsung/dma.c
> index 9338d11..fe2748b 100644
> --- a/sound/soc/samsung/dma.c
> +++ b/sound/soc/samsung/dma.c
> @@ -406,20 +406,17 @@ static void dma_free_dma_buffers(struct snd_pcm *pcm)
> }
> }
>
> -static u64 dma_mask = DMA_BIT_MASK(32);
> -
> static int dma_new(struct snd_soc_pcm_runtime *rtd)
> {
> struct snd_card *card = rtd->card->snd_card;
> struct snd_pcm *pcm = rtd->pcm;
> - int ret = 0;
> + int ret;
>
> pr_debug("Entered %s\n", __func__);
>
> - if (!card->dev->dma_mask)
> - card->dev->dma_mask = &dma_mask;
> - if (!card->dev->coherent_dma_mask)
> - card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
> + ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
> + if (ret)
> + return ret;
>
> if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
> ret = preallocate_dma_buffer(pcm,
> diff --git a/sound/soc/samsung/idma.c b/sound/soc/samsung/idma.c
> index ce1e1e1..e4f318f 100644
> --- a/sound/soc/samsung/idma.c
> +++ b/sound/soc/samsung/idma.c
> @@ -383,18 +383,15 @@ static int preallocate_idma_buffer(struct snd_pcm *pcm,
> int stream)
> return 0;
> }
>
> -static u64 idma_mask = DMA_BIT_MASK(32);
> -
> static int idma_new(struct snd_soc_pcm_runtime *rtd)
> {
> struct snd_card *card = rtd->card->snd_card;
> struct snd_pcm *pcm = rtd->pcm;
> - int ret = 0;
> + int ret;
>
> - if (!card->dev->dma_mask)
> - card->dev->dma_mask = &idma_mask;
> - if (!card->dev->coherent_dma_mask)
> - card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
> + ret = dma_coerce_mask_and_coherent(card->dev, DMA_BIT_MASK(32));
> + if (ret)
> + return ret;
>
> if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
> ret = preallocate_idma_buffer(pcm,
> --
> 1.7.4.4
>
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