On Sat, Jan 09, 2021 at 12:55:04AM +0300, Eugene Korenevsky wrote: > According to EHCI spec, EHCI HCD clears USBSTS.HCHalted whenever USBCMD.RS=1. > However, it is a good practice to wait some time after setting USBCMD.RS > (approximately 100ms) until USBSTS.HCHalted become zero. > > Instead, previous version of ehci_run() wrote 1 to USBCMD.RS, issued read to > USBCMD and waited for 5 ms. > That worked incorrectly at least at VirtualBox's EHCI virtual HCD and caused > accidental hangs (bugzilla #211095). > > This patch fixes #211095. What is this number from? Can you just provide a "Link:" tag? thanks, greg k-h
