Description: RDMA/hns: Fix init resp when alloc ucontext
References:
 https://bugzilla.suse.com/show_bug.cgi?id=1152516
 https://bugzilla.suse.com/show_bug.cgi?id=1104427
Notes:
 carnil> If I understand it correctly this issue was introduced itself
 carnil> by e088a685eae9 ("RDMA/hns: Support rq record doorbell for the
 carnil> user space") which is as well just in 4.17-rc1. So not actuall
 carnil> released version (upstream) nor in Debian was ever affected by
 carnil> this issue?
Bugs:
upstream: released (4.17-rc1) [df7e40425813c50cd252e6f5e348a81ef1acae56]
4.19-upstream-stable: N/A "Vulnerable code not present"
4.9-upstream-stable: N/A "Vulnerable code not present"
3.16-upstream-stable: N/A "Vulnerable code not present"
sid: N/A "Vulnerable code not present"
4.19-buster-security: N/A "Vulnerable code not present"
4.9-stretch-security: N/A "Vulnerable code not present"
3.16-jessie-security: N/A "Vulnerable code not present"