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commit a4720c650b68a5fe7faed2edeb0ad12645f7ae63 upstream. 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 <stern@rowland.harvard.edu> Tested-by: Jean-Denis Girard <jd.girard@sysnux.pf> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>