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From: Mika Westerberg <mika.westerberg@linux.intel.com>
To: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Cc: andreas.noever@gmail.com, westeri@kernel.org,
	YehezkelShB@gmail.com, linux-usb@vger.kernel.org,
	Mario.Limonciello@amd.com, Sanath S <Sanath.S@amd.com>
Subject: Re: [PATCH -next v3] thunderbolt: Add quirk to reset host interface on DMA path teardown for AMD USB4 routers
Date: Fri, 7 Aug 2026 08:16:28 +0200	[thread overview]
Message-ID: <20260807061628.GK235112@black.igk.intel.com> (raw)
In-Reply-To: <20260806125929.1238914-1-Basavaraj.Natikar@amd.com>

Hi,

On Thu, Aug 06, 2026 at 06:29:29PM +0530, Basavaraj Natikar wrote:
> Some AMD USB4 host routers have a bug in the Host Interface where
> DMA path setup and teardown cycles may cause the Tx ring to hang.
> 
> Fix this by issuing a Host Interface Reset on every DMA path teardown
> for affected routers. The Host Interface Reset brings the registers in
> the memory BAR to their default state and clears the End-to-End Flow
> Control state, preventing the hang condition.
> 
> Co-developed-by: Sanath S <Sanath.S@amd.com>
> Signed-off-by: Sanath S <Sanath.S@amd.com>
> Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>

I did few minor cosmetic tweaks and applied to thunderbolt.git/next,
thanks!

  reply	other threads:[~2026-08-07  6:21 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-08-06 12:59 [PATCH -next v3] thunderbolt: Add quirk to reset host interface on DMA path teardown for AMD USB4 routers Basavaraj Natikar
2026-08-07  6:16 ` Mika Westerberg [this message]
2026-08-07  8:13   ` Basavaraj Natikar

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