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From: Sascha Hauer <s.hauer@pengutronix.de>
To: Christian Eggers <ceggers@arri.de>
Cc: barebox@lists.infradead.org, Primoz Fiser <primoz.fiser@norik.com>
Subject: Re: [PATCH] usb: Add extra delay for device scan
Date: Wed, 11 Mar 2020 16:04:03 +0100	[thread overview]
Message-ID: <20200311150403.GC3335@pengutronix.de> (raw)
In-Reply-To: <20200309142026.26208-1-ceggers@arri.de>

On Mon, Mar 09, 2020 at 03:20:26PM +0100, Christian Eggers wrote:
> Since b1d9837182, detection of various USB flash drives stopped working.
> While the changes itself look correct, probably the HUB requires some
> "recovery time" between the GET_STATUS commands in order to be able to
> detect devices.
> 
> Our configuration: i.MX6ULL (USB-OTG) with only one port on the root
> HUB. This port is connected to a Microchip USB4916 hub (permanently
> attached). The USB4916 is configured with it's power on defaults which
> means that bPwrOn2PwrGood is set to the maximum (0xFF = 510 ms).
> 
> Fixes: b1d9837182 ("b1d9837182d2b20232234adb36ada2129c3a8152")
> Signed-off-by: Christian Eggers <ceggers@arri.de>
> ---
>  drivers/usb/core/hub.c | 3 +++
>  1 file changed, 3 insertions(+)

Applied with the fixes tag fixed.

Sascha


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      parent reply	other threads:[~2020-03-11 15:04 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-09 14:20 Christian Eggers
2020-03-10  9:42 ` Roland Hieber
2020-03-10 10:32   ` Christian Eggers
2020-03-11 15:04 ` Sascha Hauer [this message]

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