SRU: [PATCH] [maverick|natty]/ti-omap4 usb: ehci i/o fix
paolo.pisati at canonical.com
Wed Sep 14 13:15:04 UTC 2011
This is the famous patch from Ming Lei that fixes the abysmal perfomance
problem we had on usb on arm platforms.
- without the patch, 'dd' over usb mass storage is about 4~5MB/sec.
- After applying the patch, 'dd' over usb mass storage is about 14~16MB/sec.
The same patch already hit Oneric, proposing for Maverick and Natty.
Ming Lei (1):
usb: ehci: make HC see up-to-date qh/qtd descriptor ASAP
drivers/usb/host/ehci-q.c | 18 ++++++++++++++++++
drivers/usb/host/ehci.h | 17 +++++++++++++++++
2 files changed, 35 insertions(+), 0 deletions(-)
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