diff options
| author | Logan Gunthorpe <logang@deltatee.com> | 2021-10-14 14:18:59 +0000 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2021-10-14 09:22:47 -0500 |
| commit | 9f37ab0412eba537377c38b1dde1a04fbd7b5264 (patch) | |
| tree | 1d2d81fdb1b5e1d5628572cf49831e0ca8c0ebaa /drivers/pci/switch | |
| parent | 67116444cf55e1d070ee2060ffe4d1c72917ec31 (diff) | |
| download | linux-9f37ab0412eba537377c38b1dde1a04fbd7b5264.tar.gz | |
PCI/switchtec: Add check of event support
Not all events are supported by every gen/variant of the Switchtec firmware. To solve this, since Gen4, a new bit in each event header is introduced to indicate if an event is supported by the firmware. Link: https://lore.kernel.org/r/20211014141859.11444-6-kelvin.cao@microchip.com Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Signed-off-by: Kelvin Cao <kelvin.cao@microchip.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/switch')
| -rw-r--r-- | drivers/pci/switch/switchtec.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/pci/switch/switchtec.c b/drivers/pci/switch/switchtec.c index 236cb40cc7c5..38c2b036fb8e 100644 --- a/drivers/pci/switch/switchtec.c +++ b/drivers/pci/switch/switchtec.c @@ -1024,6 +1024,9 @@ static int event_ctl(struct switchtec_dev *stdev, return PTR_ERR(reg); hdr = ioread32(reg); + if (hdr & SWITCHTEC_EVENT_NOT_SUPP) + return -EOPNOTSUPP; + for (i = 0; i < ARRAY_SIZE(ctl->data); i++) ctl->data[i] = ioread32(®[i + 1]); @@ -1096,7 +1099,7 @@ static int ioctl_event_ctl(struct switchtec_dev *stdev, for (ctl.index = 0; ctl.index < nr_idxs; ctl.index++) { ctl.flags = event_flags; ret = event_ctl(stdev, &ctl); - if (ret < 0) + if (ret < 0 && ret != -EOPNOTSUPP) return ret; } } else { @@ -1403,6 +1406,9 @@ static int mask_event(struct switchtec_dev *stdev, int eid, int idx) hdr_reg = event_regs[eid].map_reg(stdev, off, idx); hdr = ioread32(hdr_reg); + if (hdr & SWITCHTEC_EVENT_NOT_SUPP) + return 0; + if (!(hdr & SWITCHTEC_EVENT_OCCURRED && hdr & SWITCHTEC_EVENT_EN_IRQ)) return 0; |