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| author | Vikram Pandita <vikram.pandita@ti.com> | 2011-10-30 12:55:09 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-11-14 16:46:07 -0800 |
| commit | 332960bd7eb48ef21923b4876e7fe3487d6bf11c (patch) | |
| tree | 0f41733ceaa5b21dc369fde8a5e26434b93abb81 /Documentation/ABI/testing/sysfs-bus-usb | |
| parent | 4b6181caa411ccb91ff4aad10b83d62d5a0464d3 (diff) | |
| download | linux-0-day-332960bd7eb48ef21923b4876e7fe3487d6bf11c.tar.gz linux-0-day-332960bd7eb48ef21923b4876e7fe3487d6bf11c.tar.xz | |
USB: ehci: report Data Buffer Error in debug mode
Data Buffer Error as per spec section 4.15.1.1.2
results when there is Underrun or Overrun condition.
This error is considered non-fatal and never gets reported.
Its a very good indication on things going wrong at system level,
like running memory at much slower speed.
This is a good error to flag allowing system level corrections.
An issue was found with OMAP4460 board where DDR had to be run
at full speed and this logging helped.
Signed-off-by: Vikram Pandita <vikram.pandita@ti.com>
Reviewed-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Vikram Pandita <vikram.pandita@ti.com>
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'Documentation/ABI/testing/sysfs-bus-usb')
0 files changed, 0 insertions, 0 deletions