IB/mthca: Relax UAR size check
There are some cards around that have UAR (user access region) size
different from 8 MB. Relax our sanity check to make sure that the PCI
BAR is big enough to access the UAR size reported by the device
firmware instead.
Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/mthca/mthca_main.c b/drivers/infiniband/hw/mthca/mthca_main.c
index 8b00d9a..9c849d2 100644
--- a/drivers/infiniband/hw/mthca/mthca_main.c
+++ b/drivers/infiniband/hw/mthca/mthca_main.c
@@ -155,6 +155,13 @@
return -ENODEV;
}
+ if (dev_lim->uar_size > pci_resource_len(mdev->pdev, 2)) {
+ mthca_err(mdev, "HCA reported UAR size of 0x%x bigger than "
+ "PCI resource 2 size of 0x%lx, aborting.\n",
+ dev_lim->uar_size, pci_resource_len(mdev->pdev, 2));
+ return -ENODEV;
+ }
+
mdev->limits.num_ports = dev_lim->num_ports;
mdev->limits.vl_cap = dev_lim->max_vl;
mdev->limits.mtu_cap = dev_lim->max_mtu;
@@ -976,8 +983,7 @@
err = -ENODEV;
goto err_disable_pdev;
}
- if (!(pci_resource_flags(pdev, 2) & IORESOURCE_MEM) ||
- pci_resource_len(pdev, 2) != 1 << 23) {
+ if (!(pci_resource_flags(pdev, 2) & IORESOURCE_MEM)) {
dev_err(&pdev->dev, "Missing UAR, aborting.\n");
err = -ENODEV;
goto err_disable_pdev;