From: Marek Vasut <marex@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] usb_storage: USB storage transfer size increase for xHCI
Date: Fri, 14 Aug 2015 00:42:29 +0200 [thread overview]
Message-ID: <201508140042.29334.marex@denx.de> (raw)
In-Reply-To: <CAPEA6dY71DZhHb61c_+RfdvsM0PvzXRxY1nSw9zFPaqvTYzUgQ@mail.gmail.com>
On Thursday, August 13, 2015 at 10:56:27 PM, Sergei Temerkhanov wrote:
Hi!
(please stop top-posting ; please keep the list in the loop)
> Well, when I was working on this, setting large transfer sizes resulted in,
> AFAIR, xhci_wait_for_event() timeout and changing XHCI_TIMEOUT doesn't
> help. This function returns NULL which is being dereferenced somewhere else
> (I don't remember where exactly), there are several places in the generic
> xhci support code where this is possible.
I suspect we might need a quirk for the XHCI instead them (quirk that the
controller gets stuck when you try to queue arbitrary number of descriptors).
But I wonder, don't you have some cache problems instead ? Try disabling
dcache (CONFIG_SYS_DCACHE_OFF) on your machine and see if that fixes the
problem .
Best regards,
Marek Vasut
next prev parent reply other threads:[~2015-08-13 22:42 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-13 19:00 [U-Boot] [PATCH] usb_storage: USB storage transfer size increase for xHCI Sergey Temerkhanov
2015-08-13 19:09 ` Marek Vasut
2015-08-13 19:13 ` Sergei Temerkhanov
2015-08-13 19:34 ` Marek Vasut
[not found] ` <CAPEA6dY71DZhHb61c_+RfdvsM0PvzXRxY1nSw9zFPaqvTYzUgQ@mail.gmail.com>
2015-08-13 22:42 ` Marek Vasut [this message]
2015-08-14 12:09 ` Sergei Temerkhanov
2015-08-14 12:15 ` Marek Vasut
2015-08-13 22:48 ` Sergei Temerkhanov
2015-08-13 23:12 ` Marek Vasut
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