From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Bart Van Assche <bvanassche@acm.org>,
Jason Gunthorpe <jgg@mellanox.com>,
Sasha Levin <sashal@kernel.org>,
linux-rdma@vger.kernel.org
Subject: [PATCH AUTOSEL 5.4 174/350] RDMA/core: Set DMA parameters correctly
Date: Tue, 10 Dec 2019 16:04:39 -0500 [thread overview]
Message-ID: <20191210210735.9077-135-sashal@kernel.org> (raw)
In-Reply-To: <20191210210735.9077-1-sashal@kernel.org>
From: Bart Van Assche <bvanassche@acm.org>
[ Upstream commit c9121262d57b8a3be4f08073546436ba0128ca6a ]
The dma_set_max_seg_size() call in setup_dma_device() does not have any
effect since device->dev.dma_parms is NULL. Fix this by initializing
device->dev.dma_parms first.
Link: https://lore.kernel.org/r/20191025225830.257535-5-bvanassche@acm.org
Fixes: d10bcf947a3e ("RDMA/umem: Combine contiguous PAGE_SIZE regions in SGEs")
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/infiniband/core/device.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index 50a92442c4f7c..e6327d8f5b79a 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -1199,9 +1199,21 @@ static void setup_dma_device(struct ib_device *device)
WARN_ON_ONCE(!parent);
device->dma_device = parent;
}
- /* Setup default max segment size for all IB devices */
- dma_set_max_seg_size(device->dma_device, SZ_2G);
+ if (!device->dev.dma_parms) {
+ if (parent) {
+ /*
+ * The caller did not provide DMA parameters, so
+ * 'parent' probably represents a PCI device. The PCI
+ * core sets the maximum segment size to 64
+ * KB. Increase this parameter to 2 GB.
+ */
+ device->dev.dma_parms = parent->dma_parms;
+ dma_set_max_seg_size(device->dma_device, SZ_2G);
+ } else {
+ WARN_ON_ONCE(true);
+ }
+ }
}
/*
--
2.20.1
next prev parent reply other threads:[~2019-12-10 21:28 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20191210210735.9077-1-sashal@kernel.org>
2019-12-10 21:04 ` [PATCH AUTOSEL 5.4 135/350] RDMA/hns: Fix wrong parameters when initial mtt of srq->idx_que Sasha Levin
2019-12-10 21:04 ` [PATCH AUTOSEL 5.4 140/350] RDMA/siw: Fix SQ/RQ drain logic Sasha Levin
2019-12-10 21:04 ` [PATCH AUTOSEL 5.4 171/350] RDMA/qedr: Fix memory leak in user qp and mr Sasha Levin
2019-12-10 21:04 ` [PATCH AUTOSEL 5.4 172/350] RDMA/hns: Fix memory leak on 'context' on error return path Sasha Levin
2019-12-10 21:04 ` [PATCH AUTOSEL 5.4 173/350] RDMA/qedr: Fix srqs xarray initialization Sasha Levin
2019-12-10 21:04 ` Sasha Levin [this message]
2019-12-10 21:04 ` [PATCH AUTOSEL 5.4 189/350] net/mlx5e: Verify that rule has at least one fwd/drop action Sasha Levin
2019-12-10 21:05 ` [PATCH AUTOSEL 5.4 215/350] RDMA/core: Fix return code when modify_port isn't supported Sasha Levin
2019-12-10 21:06 ` [PATCH AUTOSEL 5.4 285/350] RDMA/qib: Validate ->show()/store() callbacks before calling them Sasha Levin
2019-12-10 21:06 ` [PATCH AUTOSEL 5.4 286/350] RDMA/efa: Clear the admin command buffer prior to its submission Sasha Levin
2019-12-10 21:07 ` [PATCH AUTOSEL 5.4 344/350] RDMA/bnxt_re: Fix missing le16_to_cpu Sasha Levin
2019-12-10 21:07 ` [PATCH AUTOSEL 5.4 345/350] RDMA/bnxt_re: Fix stat push into dma buffer on gen p5 devices Sasha Levin
2019-12-10 21:07 ` [PATCH AUTOSEL 5.4 347/350] RDMA/bnxt_re: Fix chip number validation Broadcom's Gen P5 series Sasha Levin
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