From: Jon Hunter <jonathanh@nvidia.com>
To: <devel@edk2.groups.io>, <hao.a.wu@intel.com>,
<heng.luo@intel.com>, <ray.ni@intel.com>
Cc: <jbrasen@nvidia.com>
Subject: Re: [PATCH V2] MdeModulePkg/XhciDxe: Retry device slot init on failure
Date: Fri, 23 Oct 2020 10:59:37 +0100 [thread overview]
Message-ID: <06ee5adb-3fbe-709c-da24-2158f67574d5@nvidia.com> (raw)
In-Reply-To: <20201023095820.31673-1-jonathanh@nvidia.com>
On 23/10/2020 10:58, Jon Hunter wrote:
> With some super-speed USB mass storage devices it has been observed
> that a USB transaction error may occur when attempting the set the
> device address during enumeration.
>
> According the the xHCI specification (section 4.6.5) ...
>
> "A USB Transaction ErrorCompletion Code for an Address Device Command
> may be due to a Stall response from a device. Software should issue a
> Disable Slot Commandfor the Device Slot then an Enable Slot Command
> to recover from this error."
>
> To fix this, retry the device slot initialization if it fails due to a
> device error.
>
> Change-Id: Id1e06057bee518768c7246c4f0b82b6fe06aef35
> Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Sorry I forgot to remove the Change-Id. Ignore this, I will resend.
Jon
--
nvpublic
next prev parent reply other threads:[~2020-10-23 9:59 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-23 9:58 [PATCH V2] MdeModulePkg/XhciDxe: Retry device slot init on failure Jon Hunter
2020-10-23 9:59 ` Jon Hunter [this message]
-- strict thread matches above, loose matches on Subject: below --
2020-10-27 16:00 [PATCH v2 ] " Jeff Brasen
2020-10-28 1:21 ` Wu, Hao A
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