[Bug 220491] usb_storage connected SD card disconnects/reconnects on resume from suspend

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=220491

--- Comment #40 from Alan Stern (stern@rowland.harvard.edu) ---
usb-persist doesn't care whether a port has an overcurrent condition.  But it
also doesn't check for overcurrents, and so it might not work if the condition
is present.  That's not a common thing, after all.

As for how allowing a disconnect to propagate upward allows a device to
reconnect later on...  There's nothing special about it.  That's what happens
every time a device is disconnected.

When usb-persist fails, there's nothing it can do.  The only possible course of
action is to allow the disconnect to be processed by the kernel's normal
mechanisms.  Once that's done, there's nothing to prevent another connection
from occurring -- no need for anybody to "allow" anything.

You might just as well ask how unplugging as USB cable allows another device to
be plugged in (or the same device to be plugged in again).  And when the next
device connects, it will naturally receive an incremented device ID.

-- 
You may reply to this email to add a comment.

You are receiving this mail because:
You are watching the assignee of the bug.