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RDMA/core: Set DMA parameters correctly

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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: d10bcf947a ("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>
This commit is contained in:
Bart Van Assche 2019-10-25 15:58:30 -07:00 committed by Jason Gunthorpe
parent a401fb819c
commit c9121262d5
1 changed files with 14 additions and 2 deletions
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16
drivers/infiniband/core/device.c
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@ -1196,9 +1196,21 @@ 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);
}
}
}
/*