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authorAlan Stern <stern@rowland.harvard.edu>2008-06-30 11:14:43 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2008-07-21 18:16:48 -0400
commit86c57edf60f5c98adb496880f56cd0e5a3423153 (patch)
treee95742e71c85f85549d3be390803d1fa5328853f /Documentation
parentac90e36592ea5171c4e70f58b39a782d871a7d9f (diff)
USB: use reset_resume when normal resume fails
This patch (as1109b) makes USB-Persist more resilient to errors. With the current code, if a normal resume fails, it's an unrecoverable error. With the patch, if a normal resume fails (and if the device is enabled for USB-Persist) then a reset-resume is tried. This fixes the problem reported in Bugzilla #10977. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/usb/persist.txt7
1 files changed, 5 insertions, 2 deletions
diff --git a/Documentation/usb/persist.txt b/Documentation/usb/persist.txt
index d56cb1a11550..074b159b77c2 100644
--- a/Documentation/usb/persist.txt
+++ b/Documentation/usb/persist.txt
@@ -81,8 +81,11 @@ re-enumeration shows that the device now attached to that port has the
81same descriptors as before, including the Vendor and Product IDs, then 81same descriptors as before, including the Vendor and Product IDs, then
82the kernel continues to use the same device structure. In effect, the 82the kernel continues to use the same device structure. In effect, the
83kernel treats the device as though it had merely been reset instead of 83kernel treats the device as though it had merely been reset instead of
84unplugged. The same thing happens if the host controller is in the 84unplugged.
85expected state but a USB device was unplugged and then replugged. 85
86The same thing happens if the host controller is in the expected state
87but a USB device was unplugged and then replugged, or if a USB device
88fails to carry out a normal resume.
86 89
87If no device is now attached to the port, or if the descriptors are 90If no device is now attached to the port, or if the descriptors are
88different from what the kernel remembers, then the treatment is what 91different from what the kernel remembers, then the treatment is what