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IB/hfi1: Reject a zero-length user expected buffer
[ Upstream commit 0a0a6e8 ] A zero length user buffer makes no sense and the code does not handle it correctly. Instead, reject a zero length as invalid. Fixes: 97736f3 ("IB/hfi1: Validate page aligned for a given virtual addres") Signed-off-by: Dean Luick <dean.luick@cornelisnetworks.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com> Link: https://lore.kernel.org/r/167328547120.1472310.6362802432127399257.stgit@awfm-02.cornelisnetworks.com Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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