https://github.com/torvalds/linux
Ulrich reported that his USB3 cardreader does not work reliably when connected to the USB3 port. It turns out that USB3 controller failed to awaken when plugging in the USB3 cardreader. Further experiments found that the USB3 host controller can only be awakened via polling, not via PME interrupt. But if the PCIe port to which the USB3 host controller is connected is suspended, we cannot poll the controller because its config space is not accessible when the PCIe port is in a low power state. To solve the issue, the PCIe port will not be suspended if any subordinate device needs PME polling. [bhelgaas: use bool consistently rather than mixing int/bool] Reference: http://lkml.kernel.org/r/50841CCC.9030809@uli-eckhardt.de Reported-by: Ulrich Eckhardt <usb@uli-eckhardt.de> Tested-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> CC: stable@vger.kernel.org # v3.6+
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- v2.6.19-rc6
- v2.6.19-rc5
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PCI/PM: Do not suspend port if any subordinate device needs PME polling
File | Mode | Size |
---|---|---|
Makefile | -rw-r--r-- | 394 bytes |
compat.c | -rw-r--r-- | 18.4 KB |
compat_mq.c | -rw-r--r-- | 4.1 KB |
ipc_sysctl.c | -rw-r--r-- | 6.0 KB |
ipcns_notifier.c | -rw-r--r-- | 2.2 KB |
mq_sysctl.c | -rw-r--r-- | 2.7 KB |
mqueue.c | -rw-r--r-- | 35.1 KB |
msg.c | -rw-r--r-- | 21.1 KB |
msgutil.c | -rw-r--r-- | 2.8 KB |
namespace.c | -rw-r--r-- | 4.6 KB |
sem.c | -rw-r--r-- | 42.3 KB |
shm.c | -rw-r--r-- | 29.9 KB |
syscall.c | -rw-r--r-- | 2.3 KB |
util.c | -rw-r--r-- | 23.1 KB |
util.h | -rw-r--r-- | 5.3 KB |
Computing file changes ...