Hello Greg, Lorenzo is fine with this series ( https://marc.info/?l=linux-kernel&m=152147837619191&w=2 ) However, he wants your ack on this patch before merging. Could you please have a look at this patch? Kind regards, Niklas On Thu, Mar 08, 2018 at 02:33:30PM +0100, Niklas Cassel wrote: > 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@xxxxxxxx> > --- > drivers/misc/pci_endpoint_test.c | 12 +++++++----- > 1 file 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]; > -- > 2.14.2 >
