diff options
| author | Niklas Cassel <niklas.cassel@axis.com> | 2018-03-28 13:50:17 +0200 |
|---|---|---|
| committer | Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2018-04-03 12:38:06 +0100 |
| commit | 16b17cad0990f13cdcdfd9694cc7c41c7c76b0cf (patch) | |
| tree | 1fc0d558c5c728835fc1e194cf6b4547e9f1ccca /drivers | |
| parent | 96a3be43261b919a1785d080b501fae26ce97bc2 (diff) | |
| download | linux-16b17cad0990f13cdcdfd9694cc7c41c7c76b0cf.tar.gz | |
misc: pci_endpoint_test: Handle 64-bit BARs properly
A 64-bit BAR consists of a BAR pair, where the second BAR has the upper bits, so we cannot simply call pci_ioremap_bar() on every single BAR index. The second BAR in a BAR pair will not have the IORESOURCE_MEM resource flag set. Only call ioremap on BARs that have the IORESOURCE_MEM resource flag set. pci 0000:01:00.0: BAR 4: assigned [mem 0xc0300000-0xc031ffff 64bit] pci 0000:01:00.0: BAR 2: assigned [mem 0xc0320000-0xc03203ff 64bit] pci 0000:01:00.0: BAR 0: assigned [mem 0xc0320400-0xc03204ff 64bit] pci-endpoint-test 0000:01:00.0: can't ioremap BAR 1: [??? 0x00000000 flags 0x0] pci-endpoint-test 0000:01:00.0: failed to read BAR1 pci-endpoint-test 0000:01:00.0: can't ioremap BAR 3: [??? 0x00000000 flags 0x0] pci-endpoint-test 0000:01:00.0: failed to read BAR3 pci-endpoint-test 0000:01:00.0: can't ioremap BAR 5: [??? 0x00000000 flags 0x0] pci-endpoint-test 0000:01:00.0: failed to read BAR5 Signed-off-by: Niklas Cassel <niklas.cassel@axis.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/misc/pci_endpoint_test.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c index 320276f42653..fe8897e64635 100644 --- a/drivers/misc/pci_endpoint_test.c +++ b/drivers/misc/pci_endpoint_test.c @@ -534,12 +534,14 @@ static int pci_endpoint_test_probe(struct pci_dev *pdev, } for (bar = BAR_0; bar <= BAR_5; bar++) { - base = pci_ioremap_bar(pdev, bar); - if (!base) { - dev_err(dev, "failed to read BAR%d\n", bar); - WARN_ON(bar == test_reg_bar); + if (pci_resource_flags(pdev, bar) & IORESOURCE_MEM) { + base = pci_ioremap_bar(pdev, bar); + if (!base) { + dev_err(dev, "failed to read BAR%d\n", bar); + WARN_ON(bar == test_reg_bar); + } + test->bar[bar] = base; } - test->bar[bar] = base; } test->base = test->bar[test_reg_bar]; |