Xi Wang 60c3becfd1 RDMA/hns: Fix sg offset non-zero issue ... When run perftest in many times, the system will report a BUG as follows: BUG: Bad rss-counter state mm:(____ptrval____) idx:0 val:-1 BUG: Bad rss-counter state mm:(____ptrval____) idx:1 val:1 We tested with different kernel version and found it started from the the following commit: commit d10bcf947a ("RDMA/umem: Combine contiguous PAGE_SIZE regions in SGEs") In this commit, the sg->offset is always 0 when sg_set_page() is called in ib_umem_get() and the drivers are not allowed to change the sgl, otherwise it will get bad page descriptor when unfolding SGEs in __ib_umem_release() as sg_page_count() will get wrong result while sgl->offset is not 0. However, there is a weird sgl usage in the current hns driver, the driver modified sg->offset after calling ib_umem_get(), which caused we iterate past the wrong number of pages in for_each_sg_page iterator. This patch fixes it by correcting the non-standard sgl usage found in the hns_roce_db_map_user() function. Fixes: d10bcf947a ("RDMA/umem: Combine contiguous PAGE_SIZE regions in SGEs") Fixes: 0425e3e6e0 ("RDMA/hns: Support flush cqe for hip08 in kernel space") Link: https://lore.kernel.org/r/1562808737-45723-1-git-send-email-oulijun@huawei.com Signed-off-by: Xi Wang <wangxi11@huawei.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>		2019-07-22 14:44:08 -03:00
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core	5.3 Merge window RDMA pull request	2019-07-15 20:38:15 -07:00
hw	RDMA/hns: Fix sg offset non-zero issue	2019-07-22 14:44:08 -03:00
sw	RDMA/siw: Fix error return code in siw_init_module()	2019-07-22 14:28:17 -03:00
ulp	SCSI fixes on 20190720	2019-07-20 10:04:58 -07:00
Kconfig	RDMA/nldev: Added configuration of RDMA dynamic interrupt moderation to netlink	2019-07-08 16:37:22 -03:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00