On 17.08.2015 12:18, Aaron Zhou wrote:
Hi, all
https://bugzilla.kernel.org/show_bug.cgi?id=102101
Bug ID: 102101
Summary: USB 3 storage device disconnects after S3 resume,and
re-enumerate it.
I debug this problem ,and I find that when I suspend to ram (STR),
the STS_SRE bit is set. and re-initialize the HC during resume,
In xhci_resume() function, after xhci_handshake() is called ,
I printk the xhci->op_regs->status, it is 0x401, means the STS_SRE bit is set.
I can not understand.....
This is normal ?
Hi
Save Restore Error (STS_SRE) doesn't seem normal.
Last time I saw it was when the driver didn't allocate enough scratchpad
memory where it should save the state while suspending
It could be something messing with the memory where xhci state is saved,
or xhci being placed into run mode in between save and restore state.
-Mathias
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