tree 09d88d247193f1d28d93fe23970fa7a5900a6425
parent 63e7d79c42c4f1c3739da26ad08ccc636a4e6044
author Hemant Kumar <hemantk@codeaurora.org> 1462213128 -0700
committer Mayank Rana <mrana@codeaurora.org> 1486411405 -0800

usb: gadget: f_mtp: Add support to capture time taken with vfs_write/read

This change captures time taken by each vfs_read() and vfs_write() call
made from USB MTP gadget driver where data size is equal to USB request
buffer size. It provides debugfs entry to get this information for 100
such call and resetting the same.

How-To use:
To get stats:
cat /sys/kernel/debug/usb_mtp/status
To reset stats:
echo 0 > /sys/kernel/debug/usb_mtp/status

Change-Id: I252e830568704e9e557660c1ae0f7597823e4b17
Signed-off-by: Mayank Rana <mrana@codeaurora.org>
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>