[U-Boot] [PATCH] usb: ehci: add ehci max xfer size ehci config entry

Mon Oct 28 22:46:57 UTC 2019

On 10/28/19 6:35 PM, Robert Hancock wrote:
> On 2019-10-25 8:30 a.m., Gilles DOFFE wrote:
>> Some USB sticks cannot handle SIZE_MAX bytes (65535) blocks transfer,
>> leading to 'EHCI timed out on TD' errors.
>> As it is hardly predictable, this commit adds a configuration option
>> to easily reduce this EHCI max transfer size. The default value is 65535
>> which corresponds to size_t max value (SIZE_MAX).
> 
> This doesn't seem like an ideal solution, as one would have to rebuild
> U-Boot to cope with such a device. Do you know how the Linux kernel EHCI
> driver deals with this problem?

I presume this is already fixed in u-boot-usb/next by:
https://gitlab.denx.de/u-boot/custodians/u-boot-usb/commit/78d49f89e1dd9bdfa891389343bc3016bcaaeee4
https://gitlab.denx.de/u-boot/custodians/u-boot-usb/commit/b43c016256a5eb1070fbca24309e0e66590b7771
https://gitlab.denx.de/u-boot/custodians/u-boot-usb/commit/4bf7e8b7ad6231cf161fcf95d5c3cc6f1de9fff9