Dear Remy Bohmer,
In message AANLkTikqEFtB=XEAV1G6xyvOY3HW3imCPiFiLD0kVoG6@mail.gmail.com you wrote:
if (dev->descriptor.idVendor == 0x930 &&dev->descriptor.idProduct == 0x6545 &&dev->parent->descriptor.idVendor == 0x424 &&dev->parent->descriptor.idProduct == 0x2514)wait_ms(10);I have to say that I have a problem with this construction. This will solve only 1 particular situation where the user has exactly this USB stick and exactly this hub. If he uses another hub, he can have the same problem. If he use another USB-stick he also can run into this problem. What is the real cause of this issue, and can it be solved in a generic way? I feel the problem is still not understood.
Indeed the problem is not exactly understood.
Anatolij has tested a wide range of board / hub / stick combinations, and the problem happens only with this very combination.
Yes, there is a chance that another hub / stick combination might show similar issues, but so far we have not been able to find such another combo.
So, I NAK this patch.. Sorry...
So what do you propose to solve the problem? Of course we could add the delay unconditionally, for all systems. But it brings with it a performance degradation which I would not like to see either.
What do you suggest to provide a solution for this specific situation?
Best regards,
Wolfgang Denk