From: Takashi Iwai <tiwai@suse.de>
To: Hans de Goede <hdegoede@redhat.com>
Cc: "alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>,
Mark Brown <broonie@kernel.org>,
Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Subject: Re: [5.14 regression] "ALSA: core: Add continuous and vmalloc mmap ops" breaks Intel SST audio
Date: Sat, 31 Jul 2021 10:10:04 +0200 [thread overview]
Message-ID: <s5h35ru7vkz.wl-tiwai@suse.de> (raw)
In-Reply-To: <8d6674da-7d7b-803e-acc9-7de6cb1223fa@redhat.com>
On Fri, 30 Jul 2021 22:04:00 +0200,
Hans de Goede wrote:
>
> Hi All;,
>
> As discussed in the "5.14 regression, Intel SST (BYT) audio no longer works" thread,
> audio on X86 devices using the Intel SST driver no longer works with 5.14.
>
> After poking at this for a while I've found the culprit:
> 30b7ba6972d5 ("ALSA: core: Add continuous and vmalloc mmap ops")
>
> If I revert that single commit then everything works fine again with 5.14.
Does the patch below fix the problem?
thanks,
Takashi
---
--- a/sound/core/memalloc.c
+++ b/sound/core/memalloc.c
@@ -215,7 +215,7 @@ static int snd_dma_continuous_mmap(struct snd_dma_buffer *dmab,
struct vm_area_struct *area)
{
return remap_pfn_range(area, area->vm_start,
- dmab->addr >> PAGE_SHIFT,
+ page_to_pfn(virt_to_page(dmab->area)),
area->vm_end - area->vm_start,
area->vm_page_prot);
}
next prev parent reply other threads:[~2021-07-31 8:11 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-30 20:04 [5.14 regression] "ALSA: core: Add continuous and vmalloc mmap ops" breaks Intel SST audio Hans de Goede
2021-07-31 8:10 ` Takashi Iwai [this message]
2021-08-01 10:27 ` Hans de Goede
2021-08-01 11:35 ` Takashi Iwai
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