From f468cbedb2a7247c5eae737346e5e45b4733565d Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Mon, 9 Aug 2021 09:18:29 +0200 Subject: [PATCH] ALSA: pci: cs46xx: Fix set up buffer type properly commit 4d9e9153f1c64d91a125c6967bc0bfb0bb653ea0 upstream. CS46xx driver switches the buffer depending on the number of periods, and in some cases it switches to the own buffer without updating the buffer type properly. This may cause a problem with the mmap on exotic architectures that require the own mmap call for the coherent DMA buffer. This patch addresses the potential breakage by replacing the buffer setup with the proper macro. It also simplifies the source code, too. Link: https://lore.kernel.org/r/20210809071829.22238-4-tiwai@suse.de Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- sound/pci/cs46xx/cs46xx_lib.c | 30 ++++++++---------------------- 1 file changed, 8 insertions(+), 22 deletions(-) diff --git a/sound/pci/cs46xx/cs46xx_lib.c b/sound/pci/cs46xx/cs46xx_lib.c index 1e1eb17f8e077..d43927dcd61ea 100644 --- a/sound/pci/cs46xx/cs46xx_lib.c +++ b/sound/pci/cs46xx/cs46xx_lib.c @@ -1121,9 +1121,7 @@ static int snd_cs46xx_playback_hw_params(struct snd_pcm_substream *substream, if (params_periods(hw_params) == CS46XX_FRAGS) { if (runtime->dma_area != cpcm->hw_buf.area) snd_pcm_lib_free_pages(substream); - runtime->dma_area = cpcm->hw_buf.area; - runtime->dma_addr = cpcm->hw_buf.addr; - runtime->dma_bytes = cpcm->hw_buf.bytes; + snd_pcm_set_runtime_buffer(substream, &cpcm->hw_buf); #ifdef CONFIG_SND_CS46XX_NEW_DSP @@ -1143,11 +1141,8 @@ static int snd_cs46xx_playback_hw_params(struct snd_pcm_substream *substream, #endif } else { - if (runtime->dma_area == cpcm->hw_buf.area) { - runtime->dma_area = NULL; - runtime->dma_addr = 0; - runtime->dma_bytes = 0; - } + if (runtime->dma_area == cpcm->hw_buf.area) + snd_pcm_set_runtime_buffer(substream, NULL); err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); if (err < 0) { #ifdef CONFIG_SND_CS46XX_NEW_DSP @@ -1196,9 +1191,7 @@ static int snd_cs46xx_playback_hw_free(struct snd_pcm_substream *substream) if (runtime->dma_area != cpcm->hw_buf.area) snd_pcm_lib_free_pages(substream); - runtime->dma_area = NULL; - runtime->dma_addr = 0; - runtime->dma_bytes = 0; + snd_pcm_set_runtime_buffer(substream, NULL); return 0; } @@ -1287,16 +1280,11 @@ static int snd_cs46xx_capture_hw_params(struct snd_pcm_substream *substream, if (runtime->periods == CS46XX_FRAGS) { if (runtime->dma_area != chip->capt.hw_buf.area) snd_pcm_lib_free_pages(substream); - runtime->dma_area = chip->capt.hw_buf.area; - runtime->dma_addr = chip->capt.hw_buf.addr; - runtime->dma_bytes = chip->capt.hw_buf.bytes; + snd_pcm_set_runtime_buffer(substream, &chip->capt.hw_buf); substream->ops = &snd_cs46xx_capture_ops; } else { - if (runtime->dma_area == chip->capt.hw_buf.area) { - runtime->dma_area = NULL; - runtime->dma_addr = 0; - runtime->dma_bytes = 0; - } + if (runtime->dma_area == chip->capt.hw_buf.area) + snd_pcm_set_runtime_buffer(substream, NULL); err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); if (err < 0) return err; @@ -1313,9 +1301,7 @@ static int snd_cs46xx_capture_hw_free(struct snd_pcm_substream *substream) if (runtime->dma_area != chip->capt.hw_buf.area) snd_pcm_lib_free_pages(substream); - runtime->dma_area = NULL; - runtime->dma_addr = 0; - runtime->dma_bytes = 0; + snd_pcm_set_runtime_buffer(substream, NULL); return 0; }