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cxl/pci: Get AER capability address from RCRB only for RCH dport

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cxl_setup_parent_dport() needs to get RCH dport AER capability address
from RCRB to disable AER interrupt. The function does not check if dport
is RCH dport, it will get a wrong pci_host_bridge structure by dport_dev
in VH case because dport_dev points to a pci device(RP or switch DSP)
rather than a pci host bridge device.

Fixes: f05fd10d13 ("cxl/pci: Add RCH downstream port AER register discovery")
Signed-off-by: Li Ming <ming4.li@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Alison Schofield <alison.schofield@intel.com>
Link: https://patch.msgid.link/20240809082750.3015641-2-ming4.li@intel.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
This commit is contained in:
Li Ming 2024-08-09 08:27:49 +00:00 committed by Dave Jiang
parent de9c2c66ad
commit 8c251c5ab1
1 changed files with 6 additions and 4 deletions
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10
drivers/cxl/core/pci.c
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@ -834,11 +834,13 @@ static void cxl_disable_rch_root_ints(struct cxl_dport *dport)
void cxl_setup_parent_dport(struct device *host, struct cxl_dport *dport)
{
struct device *dport_dev = dport->dport_dev;
struct pci_host_bridge *host_bridge;
host_bridge = to_pci_host_bridge(dport_dev);
if (host_bridge->native_aer)
dport->rcrb.aer_cap = cxl_rcrb_to_aer(dport_dev, dport->rcrb.base);
if (dport->rch) {
struct pci_host_bridge *host_bridge = to_pci_host_bridge(dport_dev);
if (host_bridge->native_aer)
dport->rcrb.aer_cap = cxl_rcrb_to_aer(dport_dev, dport->rcrb.base);
}
dport->reg_map.host = host;
cxl_dport_map_regs(dport);