[cip-dev] [RFC PATCH 4.19.y-cip 19/50] PCI: endpoint: Allocate enough space for fixed size BAR

Lad Prabhakar
2020-10-12T14:20:32Z

[-- Attachment #1: Type: text/plain, Size: 1652 bytes --]

From: Alan Mikhak <alan.mikhak@sifive.com>

commit f16fb16ed16c7f561e9c41c9ae4107c7f6aa553c upstream.

PCI endpoint test function code should honor the .bar_fixed_size parameter
from underlying endpoint controller drivers or results may be unexpected.

In pci_epf_test_alloc_space(), check if BAR being used for test
register space is a fixed size BAR. If so, allocate the required fixed
size.

Signed-off-by: Alan Mikhak <alan.mikhak@sifive.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
drivers/pci/endpoint/functions/pci-epf-test.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c
index 27806987e93b..7d41e6684b87 100644
--- a/drivers/pci/endpoint/functions/pci-epf-test.c
+++ b/drivers/pci/endpoint/functions/pci-epf-test.c
@@ -434,10 +434,16 @@ static int pci_epf_test_alloc_space(struct pci_epf *epf)
int bar;
enum pci_barno test_reg_bar = epf_test->test_reg_bar;
const struct pci_epc_features *epc_features;
+ size_t test_reg_size;

epc_features = epf_test->epc_features;

- base = pci_epf_alloc_space(epf, sizeof(struct pci_epf_test_reg),
+ if (epc_features->bar_fixed_size[test_reg_bar])
+ test_reg_size = bar_size[test_reg_bar];
+ else
+ test_reg_size = sizeof(struct pci_epf_test_reg);
+
+ base = pci_epf_alloc_space(epf, test_reg_size,
test_reg_bar, epc_features->align);
if (!base) {
dev_err(dev, "Failed to allocated register space\n");
--
2.17.1

[-- Attachment #2: Type: text/plain, Size: 420 bytes --]

-=-=-=-=-=-=-=-=-=-=-=-
Links: You receive all messages sent to this group.
View/Reply Online (#5539): https://lists.cip-project.org/g/cip-dev/message/5539
Mute This Topic: https://lists.cip-project.org/mt/77461682/4520388