Thank you very much for your reply, Your reply can solve our problems, thank you Best Regards, Pengcheng Li -----邮件原件----- 发件人: Matthew Dharm [mailto:mdharm-usb@xxxxxxxxxxxxxxxxxx] 发送时间: 2016年3月3日 23:45 收件人: Lipengcheng 抄送: gregkh@xxxxxxxxxxxxxxxxxxx; linux-usb@xxxxxxxxxxxxxxx 主题: Re: The delay is present because we discovered many usb-storage devices that were not ready to accept commands immediately after insertion. We studied the behavior of Microsoft Windows and discovered it used a small delay before sending commands to the device, and thus we also implemented a delay. Some devices will work with delay_use = 0. Some will not. Matt On Thu, Mar 3, 2016 at 4:24 AM, Lipengcheng <lpc.li@xxxxxxxxxxxxx> wrote: > Hi, > > Please tell me why the process to delay to call in the 1s? The > delay_use = 0, we also found no side effects.So we can set the delay_use = 0? > > > > drivers/usb/storage/usb.c > > > > Best Regards, > > Pengcheng Li -- Matthew Dharm Maintainer, USB Mass Storage driver for Linux ��.n��������+%������w��{.n�����{���)�� jg��� �����ݢj����G���� ���j:+v���w�m������w�������h�����٥
