From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Takashi Iwai <tiwai@suse.de>,
Jeff Woods <jwoods@fnordco.com>
Subject: [PATCH 5.10 14/19] ALSA: pcm: Fix mmap breakage without explicit buffer setup
Date: Fri, 13 Aug 2021 17:07:31 +0200 [thread overview]
Message-ID: <20210813150523.094017504@linuxfoundation.org> (raw)
In-Reply-To: <20210813150522.623322501@linuxfoundation.org>
From: Takashi Iwai <tiwai@suse.de>
commit dc0dc8a73e8e4dc33fba93dfe23356cc5a500c57 upstream.
The recent fix c4824ae7db41 ("ALSA: pcm: Fix mmap capability check")
restricts the mmap capability only to the drivers that properly set up
the buffers, but it caused a regression for a few drivers that manage
the buffer on its own way.
For those with UNKNOWN buffer type (i.e. the uninitialized / unused
substream->dma_buffer), just assume that the driver handles the mmap
properly and blindly trust the hardware info bit.
Fixes: c4824ae7db41 ("ALSA: pcm: Fix mmap capability check")
Reported-and-tested-by: Jeff Woods <jwoods@fnordco.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/s5him0gpghv.wl-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
sound/core/pcm_native.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -251,7 +251,10 @@ static bool hw_support_mmap(struct snd_p
switch (substream->dma_buffer.dev.type) {
case SNDRV_DMA_TYPE_UNKNOWN:
- return false;
+ /* we can't know the device, so just assume that the driver does
+ * everything right
+ */
+ return true;
case SNDRV_DMA_TYPE_CONTINUOUS:
case SNDRV_DMA_TYPE_VMALLOC:
return true;
next prev parent reply other threads:[~2021-08-13 15:20 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-13 15:07 [PATCH 5.10 00/19] 5.10.59-rc1 review Greg Kroah-Hartman
2021-08-13 15:07 ` [PATCH 5.10 01/19] KVM: SVM: Fix off-by-one indexing when nullifying last used SEV VMCB Greg Kroah-Hartman
2021-08-13 15:07 ` [PATCH 5.10 02/19] tee: Correct inappropriate usage of TEE_SHM_DMA_BUF flag Greg Kroah-Hartman
2021-08-13 15:07 ` [PATCH 5.10 03/19] firmware: tee_bnxt: Release TEE shm, session, and context during kexec Greg Kroah-Hartman
2021-08-13 15:07 ` [PATCH 5.10 04/19] bpf: Add _kernel suffix to internal lockdown_bpf_read Greg Kroah-Hartman
2021-08-13 19:55 ` Pavel Machek
2021-08-13 21:57 ` Daniel Borkmann
2021-08-15 11:42 ` Greg Kroah-Hartman
2021-08-13 15:07 ` [PATCH 5.10 05/19] bpf: Add lockdown check for probe_write_user helper Greg Kroah-Hartman
2021-08-13 15:07 ` [PATCH 5.10 06/19] Revert "selftests/resctrl: Use resctrl/info for feature detection" Greg Kroah-Hartman
2021-08-13 15:07 ` [PATCH 5.10 07/19] mm: make zone_to_nid() and zone_set_nid() available for DISCONTIGMEM Greg Kroah-Hartman
2021-08-13 15:07 ` [PATCH 5.10 08/19] arm64: dts: renesas: rzg2: Add usb2_clksel to RZ/G2 M/N/H Greg Kroah-Hartman
2021-08-13 15:07 ` [PATCH 5.10 09/19] arm64: dts: renesas: beacon: Fix USB extal reference Greg Kroah-Hartman
2021-08-13 15:07 ` [PATCH 5.10 10/19] arm64: dts: renesas: beacon: Fix USB ref clock references Greg Kroah-Hartman
2021-08-13 15:07 ` [PATCH 5.10 11/19] vboxsf: Honor excl flag to the dir-inode create op Greg Kroah-Hartman
2021-08-13 15:07 ` [PATCH 5.10 12/19] vboxsf: Make vboxsf_dir_create() return the handle for the created file Greg Kroah-Hartman
2021-08-13 19:31 ` Pavel Machek
2021-08-15 11:43 ` Greg Kroah-Hartman
2021-08-15 13:57 ` Hans de Goede
2021-08-16 8:49 ` Greg Kroah-Hartman
2021-08-17 15:52 ` Sudip Mukherjee
2021-08-17 18:21 ` Hans de Goede
2021-08-13 15:07 ` [PATCH 5.10 13/19] USB:ehci:fix Kunpeng920 ehci hardware problem Greg Kroah-Hartman
2021-08-13 15:07 ` Greg Kroah-Hartman [this message]
2021-08-13 15:07 ` [PATCH 5.10 15/19] ALSA: hda/realtek: fix mute/micmute LEDs for HP ProBook 650 G8 Notebook PC Greg Kroah-Hartman
2021-08-13 15:07 ` [PATCH 5.10 16/19] ALSA: hda: Add quirk for ASUS Flow x13 Greg Kroah-Hartman
2021-08-13 15:07 ` [PATCH 5.10 17/19] ppp: Fix generating ppp unit id when ifname is not specified Greg Kroah-Hartman
2021-08-13 15:07 ` [PATCH 5.10 18/19] ovl: prevent private clone if bind mount is not allowed Greg Kroah-Hartman
2021-08-13 15:07 ` [PATCH 5.10 19/19] net: xilinx_emaclite: Do not print real IOMEM pointer Greg Kroah-Hartman
2021-08-13 23:24 ` [PATCH 5.10 00/19] 5.10.59-rc1 review Shuah Khan
2021-08-14 11:07 ` Sudip Mukherjee
2021-08-14 11:35 ` Naresh Kamboju
2021-08-14 15:08 ` Fox Chen
2021-08-14 18:16 ` Guenter Roeck
2021-08-15 19:48 ` Pavel Machek
2021-08-16 3:03 ` Samuel Zou
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