diff options
| author | Tomasz Nowicki <tn@semihalf.com> | 2017-03-31 18:06:44 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2017-04-03 23:10:21 +0300 |
| commit | feb199ebef488a9f2c3550fb10524f3dac9d8abe (patch) | |
| tree | 550c2cf1c487f1ddfacdb634e1c1f04489ae21b2 /drivers/pci | |
| parent | 9abb27c7594a62bbf6385e20b7f5a90b4eceae2f (diff) | |
| download | linux-feb199ebef488a9f2c3550fb10524f3dac9d8abe.tar.xz | |
PCI: thunder-pem: Fix legacy firmware PEM-specific resources
SZ_16M PEM resource size includes PEM-specific register and its children
resources. Reservation of the whole SZ_16M range leads to child device
driver failure when pcieport driver is requesting resources:
pcieport 0004:1f:00.0: can't enable device: BAR 0 [mem 0x87e0c0f00000-0x87e0c0ffffff 64bit] not claimed
So we cannot reserve full 16M here and instead we want to reserve
PEM-specific register only which is SZ_64K.
At the end increase PEM resource to SZ_16M since this is what
thunder_pem_init() call expects for proper initialization.
Fixes: 9abb27c7594a ("PCI: thunder-pem: Add legacy firmware support for Cavium ThunderX host controller")
Signed-off-by: Tomasz Nowicki <tn@semihalf.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org # v4.10+
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/host/pci-thunder-pem.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/pci/host/pci-thunder-pem.c b/drivers/pci/host/pci-thunder-pem.c index b89c373555c5..6e031b522529 100644 --- a/drivers/pci/host/pci-thunder-pem.c +++ b/drivers/pci/host/pci-thunder-pem.c @@ -375,7 +375,6 @@ static void thunder_pem_legacy_fw(struct acpi_pci_root *root, index -= node * PEM_MAX_DOM_IN_NODE; res_pem->start = PEM_RES_BASE | FIELD_PREP(PEM_NODE_MASK, node) | FIELD_PREP(PEM_INDX_MASK, index); - res_pem->end = res_pem->start + SZ_16M - 1; res_pem->flags = IORESOURCE_MEM; } @@ -399,8 +398,15 @@ static int thunder_pem_acpi_init(struct pci_config_window *cfg) */ if (ret) { thunder_pem_legacy_fw(root, res_pem); - /* Reserve PEM-specific resources and PCI configuration space */ + /* + * Reserve 64K size PEM specific resources. The full 16M range + * size is required for thunder_pem_init() call. + */ + res_pem->end = res_pem->start + SZ_64K - 1; thunder_pem_reserve_range(dev, root->segment, res_pem); + res_pem->end = res_pem->start + SZ_16M - 1; + + /* Reserve PCI configuration space as well. */ thunder_pem_reserve_range(dev, root->segment, &cfg->res); } |