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s390/qdio: cancel the ESTABLISH ccw after timeout
When the ESTABLISH ccw does not complete within the specified timeout, try our best to cancel the ccw program that is still active on the device. Otherwise the IO subsystem might be accessing it even after the driver eg. called qdio_free(). Fixes: 779e6e1 ("[S390] qdio: new qdio driver.") Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Reviewed-by: Benjamin Block <bblock@linux.ibm.com> Cc: <stable@vger.kernel.org> # 2.6.27 Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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