linux-kernel - Re: [PATCH v2 4/4] ALSA: hda/intel: Raise msi_addr_mask to dma

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Message-ID: <878qdrs7oy.wl-tiwai@suse.de>
Date: Wed, 21 Jan 2026 09:15:09 +0100
From: Takashi Iwai <tiwai@...e.de>
To: Vivian Wang <wangruikang@...as.ac.cn>
Cc: Madhavan Srinivasan <maddy@...ux.ibm.com>,	Michael Ellerman
 <mpe@...erman.id.au>,	Nicholas Piggin <npiggin@...il.com>,
	"Christophe Leroy (CS GROUP)" <chleroy@...nel.org>,	Alex Deucher
 <alexander.deucher@....com>,	Christian König
 <christian.koenig@....com>,	David Airlie <airlied@...il.com>,	Simona Vetter
 <simona@...ll.ch>,	"Creeley, Brett" <bcreeley@....com>,	Andrew Lunn
 <andrew+netdev@...n.ch>,	"David S. Miller" <davem@...emloft.net>,	Eric
 Dumazet <edumazet@...gle.com>,	Jakub Kicinski <kuba@...nel.org>,	Paolo
 Abeni <pabeni@...hat.com>,	Bjorn Helgaas <bhelgaas@...gle.com>,	Jaroslav
 Kysela <perex@...ex.cz>,	Takashi Iwai <tiwai@...e.com>,	Han Gao
 <gaohan@...as.ac.cn>,	linuxppc-dev@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org,	amd-gfx@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org,	netdev@...r.kernel.org,
	linux-pci@...r.kernel.org,	linux-sound@...r.kernel.org,
	linux-riscv@...ts.infradead.org,	sophgo@...ts.linux.dev
Subject: Re: [PATCH v2 4/4] ALSA: hda/intel: Raise msi_addr_mask to dma_bits

On Wed, 21 Jan 2026 04:49:40 +0100,
Vivian Wang wrote:
> 
> The code was originally written using no_64bit_msi, which restricts the
> device to 32-bit MSI addresses.
> 
> Since msi_addr_mask is introduced, use DMA_BIT_MASK(dma_bits) instead of
> DMA_BIT_MASK(32) here for msi_addr_mask, describing the restriction more
> precisely and allowing these devices to work on platforms with MSI
> doorbell address above 32-bit space, as long as it is within the
> hardware's addressable space.
> 
> Signed-off-by: Vivian Wang <wangruikang@...as.ac.cn>
> 
> ---
> v2: No changes
> 
> hda/intel maintainers: I don't know if this is the correct restriction.
> Please help with checking. Thanks.

The quirk is used only for AMD graphics chips, so this should
(hopefully) work.

Acked-by: Takashi Iwai <tiwai@...e.de>


thanks,

Takashi