| Message ID | 20220726020527.99816-1-chenzhuo.1@bytedance.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v2] PCI/ERR: Use pcie_aer_is_native() to judge whether OS owns AER | expand |
On 7/25/22 7:05 PM, Zhuo Chen wrote: > The AER status of the device that reported the error rather than > the first downstream port is cleared after commit 7d7cbeaba5b7 > ("PCI/ERR: Clear status of the reporting device"). So "a bridge > may not exist" which commit aa344bc8b727 ("PCI/ERR: Clear AER > status only when we control AER") referring to is no longer > existent, and we just use pcie_aer_is_native() in stead of > "host->native_aer || pcie_ports_native". IMO, above history is not required to justify using pcie_aer_is_native() in place of "host->native_aer || pcie_ports_native". > > pci_aer_clear_nonfatal_status() already has pcie_aer_is_native(), > so we move pci_aer_clear_nonfatal_status() out of > pcie_aer_is_native(). Moving it outside (pcie_aer_is_native()) does not optimize the code. So I think it is better to leave it inside. > > Replace statements that judge whether OS owns AER in > get_port_device_capability() with pcie_aer_is_native(), which has > no functional changes. > > Signed-off-by: Zhuo Chen <chenzhuo.1@bytedance.com> > --- > v2: > - Add details and note in commit log > --- > drivers/pci/pcie/err.c | 12 ++---------- > drivers/pci/pcie/portdrv_core.c | 3 +-- > 2 files changed, 3 insertions(+), 12 deletions(-) > > diff --git a/drivers/pci/pcie/err.c b/drivers/pci/pcie/err.c > index 0c5a143025af..28339c741555 100644 > --- a/drivers/pci/pcie/err.c > +++ b/drivers/pci/pcie/err.c > @@ -184,7 +184,6 @@ pci_ers_result_t pcie_do_recovery(struct pci_dev *dev, > int type = pci_pcie_type(dev); > struct pci_dev *bridge; > pci_ers_result_t status = PCI_ERS_RESULT_CAN_RECOVER; > - struct pci_host_bridge *host = pci_find_host_bridge(dev->bus); > > /* > * If the error was detected by a Root Port, Downstream Port, RCEC, > @@ -237,16 +236,9 @@ pci_ers_result_t pcie_do_recovery(struct pci_dev *dev, > pci_dbg(bridge, "broadcast resume message\n"); > pci_walk_bridge(bridge, report_resume, &status); > > - /* > - * If we have native control of AER, clear error status in the device > - * that detected the error. If the platform retained control of AER, > - * it is responsible for clearing this status. In that case, the > - * signaling device may not even be visible to the OS. > - */ The above comment is still applicable. So I think you don't need to remove it. > - if (host->native_aer || pcie_ports_native) { > + if (pcie_aer_is_native(dev)) > pcie_clear_device_status(dev); > - pci_aer_clear_nonfatal_status(dev); > - } > + pci_aer_clear_nonfatal_status(dev); > pci_info(bridge, "device recovery successful\n"); > return status; > > diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c > index 604feeb84ee4..98c18f4a01b2 100644 > --- a/drivers/pci/pcie/portdrv_core.c > +++ b/drivers/pci/pcie/portdrv_core.c > @@ -221,8 +221,7 @@ static int get_port_device_capability(struct pci_dev *dev) > } > > #ifdef CONFIG_PCIEAER > - if (dev->aer_cap && pci_aer_available() && > - (pcie_ports_native || host->native_aer)) { > + if (pcie_aer_is_native(dev) && pci_aer_available()) { > services |= PCIE_PORT_SERVICE_AER; > > /*
diff --git a/drivers/pci/pcie/err.c b/drivers/pci/pcie/err.c index 0c5a143025af..28339c741555 100644 --- a/drivers/pci/pcie/err.c +++ b/drivers/pci/pcie/err.c @@ -184,7 +184,6 @@ pci_ers_result_t pcie_do_recovery(struct pci_dev *dev, int type = pci_pcie_type(dev); struct pci_dev *bridge; pci_ers_result_t status = PCI_ERS_RESULT_CAN_RECOVER; - struct pci_host_bridge *host = pci_find_host_bridge(dev->bus); /* * If the error was detected by a Root Port, Downstream Port, RCEC, @@ -237,16 +236,9 @@ pci_ers_result_t pcie_do_recovery(struct pci_dev *dev, pci_dbg(bridge, "broadcast resume message\n"); pci_walk_bridge(bridge, report_resume, &status); - /* - * If we have native control of AER, clear error status in the device - * that detected the error. If the platform retained control of AER, - * it is responsible for clearing this status. In that case, the - * signaling device may not even be visible to the OS. - */ - if (host->native_aer || pcie_ports_native) { + if (pcie_aer_is_native(dev)) pcie_clear_device_status(dev); - pci_aer_clear_nonfatal_status(dev); - } + pci_aer_clear_nonfatal_status(dev); pci_info(bridge, "device recovery successful\n"); return status; diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c index 604feeb84ee4..98c18f4a01b2 100644 --- a/drivers/pci/pcie/portdrv_core.c +++ b/drivers/pci/pcie/portdrv_core.c @@ -221,8 +221,7 @@ static int get_port_device_capability(struct pci_dev *dev) } #ifdef CONFIG_PCIEAER - if (dev->aer_cap && pci_aer_available() && - (pcie_ports_native || host->native_aer)) { + if (pcie_aer_is_native(dev) && pci_aer_available()) { services |= PCIE_PORT_SERVICE_AER; /*
The AER status of the device that reported the error rather than the first downstream port is cleared after commit 7d7cbeaba5b7 ("PCI/ERR: Clear status of the reporting device"). So "a bridge may not exist" which commit aa344bc8b727 ("PCI/ERR: Clear AER status only when we control AER") referring to is no longer existent, and we just use pcie_aer_is_native() in stead of "host->native_aer || pcie_ports_native". pci_aer_clear_nonfatal_status() already has pcie_aer_is_native(), so we move pci_aer_clear_nonfatal_status() out of pcie_aer_is_native(). Replace statements that judge whether OS owns AER in get_port_device_capability() with pcie_aer_is_native(), which has no functional changes. Signed-off-by: Zhuo Chen <chenzhuo.1@bytedance.com> --- v2: - Add details and note in commit log --- drivers/pci/pcie/err.c | 12 ++---------- drivers/pci/pcie/portdrv_core.c | 3 +-- 2 files changed, 3 insertions(+), 12 deletions(-)