diff options
| author | Rick Wertenbroek <rick.wertenbroek@gmail.com> | 2024-04-03 16:45:08 +0200 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2024-05-15 16:07:30 -0500 |
| commit | 2dba285caba53f309d6060fca911b43d63f41697 (patch) | |
| tree | 419e5390eba9bac1114b722791797fe807182c2a /drivers/pci | |
| parent | de66b37a174f979cb1c7e9ba15e87f181cb5ad32 (diff) | |
PCI: rockchip-ep: Remove wrong mask on subsys_vendor_id
Remove wrong mask on subsys_vendor_id. Both the Vendor ID and Subsystem
Vendor ID are u16 variables and are written to a u32 register of the
controller. The Subsystem Vendor ID was always 0 because the u16 value
was masked incorrectly with GENMASK(31,16) resulting in all lower 16
bits being set to 0 prior to the shift.
Remove both masks as they are unnecessary and set the register correctly
i.e., the lower 16-bits are the Vendor ID and the upper 16-bits are the
Subsystem Vendor ID.
This is documented in the RK3399 TRM section 17.6.7.1.17
[kwilczynski: removed unnecesary newline]
Fixes: cf590b078391 ("PCI: rockchip: Add EP driver for Rockchip PCIe controller")
Link: https://lore.kernel.org/linux-pci/20240403144508.489835-1-rick.wertenbroek@gmail.com
Signed-off-by: Rick Wertenbroek <rick.wertenbroek@gmail.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/controller/pcie-rockchip-ep.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/pci/controller/pcie-rockchip-ep.c b/drivers/pci/controller/pcie-rockchip-ep.c index 57472cf48997..d42177a3dec3 100644 --- a/drivers/pci/controller/pcie-rockchip-ep.c +++ b/drivers/pci/controller/pcie-rockchip-ep.c @@ -98,10 +98,8 @@ static int rockchip_pcie_ep_write_header(struct pci_epc *epc, u8 fn, u8 vfn, /* All functions share the same vendor ID with function 0 */ if (fn == 0) { - u32 vid_regs = (hdr->vendorid & GENMASK(15, 0)) | - (hdr->subsys_vendor_id & GENMASK(31, 16)) << 16; - - rockchip_pcie_write(rockchip, vid_regs, + rockchip_pcie_write(rockchip, + hdr->vendorid | hdr->subsys_vendor_id << 16, PCIE_CORE_CONFIG_VENDOR); } |