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[2003:ca:572b:5e23:c4ff:d690:35d3:b735]) by smtp.gmail.com with ESMTPSA id j2sm5817548wrd.14.2021.07.25.23.09.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 25 Jul 2021 23:09:15 -0700 (PDT) From: Pankaj Gupta To: nvdimm@lists.linux.dev, linux-kernel@vger.kernel.org Cc: dan.j.williams@intel.com, jmoyer@redhat.com, david@redhat.com, mst@redhat.com, cohuck@redhat.com, vishal.l.verma@intel.com, dave.jiang@intel.com, ira.weiny@intel.com, pankaj.gupta.linux@gmail.com, Pankaj Gupta Subject: [RFC v2 2/2] pmem: Enable pmem_submit_bio for asynchronous flush Date: Mon, 26 Jul 2021 08:08:55 +0200 Message-Id: <20210726060855.108250-3-pankaj.gupta.linux@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210726060855.108250-1-pankaj.gupta.linux@gmail.com> References: <20210726060855.108250-1-pankaj.gupta.linux@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Pankaj Gupta Return from "pmem_submit_bio" when asynchronous flush is in process in other context. Signed-off-by: Pankaj Gupta --- drivers/nvdimm/pmem.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index 1e0615b8565e..3ca1fa88a5e7 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -201,8 +201,13 @@ static blk_qc_t pmem_submit_bio(struct bio *bio) struct pmem_device *pmem = bio->bi_bdev->bd_disk->private_data; struct nd_region *nd_region = to_region(pmem); - if (bio->bi_opf & REQ_PREFLUSH) - ret = nvdimm_flush(nd_region, bio); + if ((bio->bi_opf & REQ_PREFLUSH) && + nvdimm_flush(nd_region, bio)) { + + /* asynchronous flush completes in other context */ + if (nd_region->flush) + return BLK_QC_T_NONE; + } do_acct = blk_queue_io_stat(bio->bi_bdev->bd_disk->queue); if (do_acct) @@ -222,11 +227,13 @@ static blk_qc_t pmem_submit_bio(struct bio *bio) if (do_acct) bio_end_io_acct(bio, start); - if (bio->bi_opf & REQ_FUA) + if (bio->bi_opf & REQ_FUA) { ret = nvdimm_flush(nd_region, bio); - if (ret) - bio->bi_status = errno_to_blk_status(ret); + /* asynchronous flush completes in other context */ + if (nd_region->flush) + return BLK_QC_T_NONE; + } bio_endio(bio); return BLK_QC_T_NONE; -- 2.25.1