Hi Simon, I do see only first warning on all the devices and rest of the warnings on a few mass storage device.
My patch fixing these warnings is not accepted. Please see below link for further info -
http://lists.denx.de/pipermail/u-boot/2012-March/119404.html
IMO, these warnings spew when we expects some info e.g. device descriptor, manf id, prod id... from the device. The root cause of the issue is some race condition in H/w due to which, even though we receive "STD_ASS"(Async sequence status) as 0 still transfer descriptor token is not updated.
Thanx & Regards, Puneet
On Monday 05 March 2012 11:48 PM, Simon Glass wrote:
Hi Puneet,
On Mon, Mar 5, 2012 at 6:46 AM, Puneet Saxenapuneets@nvidia.com wrote:
As DMA expects the buffers to be equal and larger then cache lines, This aligns buffers at cacheline.
Signed-off-by: Puneet Saxenapuneets@nvidia.com
Tested on Seaboard:
Tested-by: Simon Glasssjg@chromium.org Acked-by: Simon Glasssjg@chromium.org
I do still see a few alignment warnings, but only a tidy fraction of what we had. Do you see these?
Tegra2 (SeaBoard) # usb start (Re)start USB... USB: Register 10011 NbrPorts 1 USB EHCI 1.00 scanning bus for devices... ERROR: v7_dcache_inval_range - start address is not aligned - 0x3fbed6f2 ERROR: v7_dcache_inval_range - stop address is not aligned - 0x3fbed732 ERROR: v7_dcache_inval_range - start address is not aligned - 0x3fbed484 ERROR: v7_dcache_inval_range - stop address is not aligned - 0x3fbed584 ERROR: v7_dcache_inval_range - start address is not aligned - 0x3fbed492 ERROR: v7_dcache_inval_range - stop address is not aligned - 0x3fbed592 ERROR: v7_dcache_inval_range - start address is not aligned - 0x3fbed49e ERROR: v7_dcache_inval_range - stop address is not aligned - 0x3fbed59e ERROR: v7_dcache_inval_range - start address is not aligned - 0x3fbed4a2 ERROR: v7_dcache_inval_range - stop address is not aligned - 0x3fbed582 2 USB Device(s) found scanning bus for storage devices... 1 Storage Device(s) found
Regards, Simon
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