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This patch (as1295) fixes a recently-added bug in the USB serial core. If certain kinds of errors occur during probing, the core may call a serial driver's release method without previously calling the attach method. This causes some drivers (io_ti in particular) to perform an invalid memory access. The patch adds a new flag to keep track of whether or not attach has been called. Signed-off-by: Alan Stern <[email protected]> Tested-by: Jean-Denis Girard <[email protected]> CC: stable <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>