| Message ID | 20241022-pci-pwrctl-rework-v1-0-94a7e90f58c5@linaro.org (mailing list archive) |
|---|---|
| Headers | show |
| Series | PCI/pwrctl: Ensure that the pwrctl drivers are probed before PCI client drivers | expand |
On Tue, 22 Oct 2024 at 12:28, Manivannan Sadhasivam via B4 Relay <devnull+manivannan.sadhasivam.linaro.org@kernel.org> wrote: > > Hi, > > This series reworks the PCI/pwrctl integration to ensure that the pwrctl drivers > are always probed before the PCI client drivers. This series addresses a race > condition when both pwrctl and pwrctl/pwrseq drivers probe parallely (even when > the later one probes last). One such issue was reported for the Qcom X13s > platform with WLAN module and fixed with 'commit a9aaf1ff88a8 ("power: > sequencing: request the WLAN enable GPIO as-is")'. > > Though the issue was fixed with a hack in the pwrseq driver, it was clear that > the issue is applicable to all pwrctl drivers. Hence, this series tries to > address the issue in the PCI/pwrctl integration. > > - Mani > > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> > --- > Manivannan Sadhasivam (5): > PCI/pwrctl: Use of_platform_device_create() to create pwrctl devices > PCI/pwrctl: Create pwrctl devices only if at least one power supply is present > PCI/pwrctl: Ensure that the pwrctl drivers are probed before the PCI client drivers > PCI/pwrctl: Move pwrctl device creation to its own helper function > PCI/pwrctl: Remove pwrctl device without iterating over all children of pwrctl parent > > drivers/pci/bus.c | 64 +++++++++++++++++++++++++++++++++++++++++------ > drivers/pci/of.c | 27 ++++++++++++++++++++ > drivers/pci/pci.h | 5 ++++ > drivers/pci/pwrctl/core.c | 10 -------- > drivers/pci/remove.c | 17 ++++++------- > 5 files changed, 96 insertions(+), 27 deletions(-) > --- > base-commit: 48dc7986beb60522eb217c0016f999cc7afaf0b7 > change-id: 20241022-pci-pwrctl-rework-a1b024158555 > > Best regards, > -- > Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> > > Excellent work, thanks for doing this. Tested on: sc8280xp-crd, RB5 and sm8450-hdk. Tested-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> Just a couple nits from my side under respective patches. Bart
On 10/23/2024 4:00 PM, Bartosz Golaszewski wrote: > On Tue, 22 Oct 2024 at 12:28, Manivannan Sadhasivam via B4 Relay > <devnull+manivannan.sadhasivam.linaro.org@kernel.org> wrote: >> >> Hi, >> >> This series reworks the PCI/pwrctl integration to ensure that the pwrctl drivers >> are always probed before the PCI client drivers. This series addresses a race >> condition when both pwrctl and pwrctl/pwrseq drivers probe parallely (even when >> the later one probes last). One such issue was reported for the Qcom X13s >> platform with WLAN module and fixed with 'commit a9aaf1ff88a8 ("power: >> sequencing: request the WLAN enable GPIO as-is")'. >> >> Though the issue was fixed with a hack in the pwrseq driver, it was clear that >> the issue is applicable to all pwrctl drivers. Hence, this series tries to >> address the issue in the PCI/pwrctl integration. >> >> - Mani >> >> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> >> --- >> Manivannan Sadhasivam (5): >> PCI/pwrctl: Use of_platform_device_create() to create pwrctl devices >> PCI/pwrctl: Create pwrctl devices only if at least one power supply is present >> PCI/pwrctl: Ensure that the pwrctl drivers are probed before the PCI client drivers >> PCI/pwrctl: Move pwrctl device creation to its own helper function >> PCI/pwrctl: Remove pwrctl device without iterating over all children of pwrctl parent >> >> drivers/pci/bus.c | 64 +++++++++++++++++++++++++++++++++++++++++------ >> drivers/pci/of.c | 27 ++++++++++++++++++++ >> drivers/pci/pci.h | 5 ++++ >> drivers/pci/pwrctl/core.c | 10 -------- >> drivers/pci/remove.c | 17 ++++++------- >> 5 files changed, 96 insertions(+), 27 deletions(-) >> --- >> base-commit: 48dc7986beb60522eb217c0016f999cc7afaf0b7 >> change-id: 20241022-pci-pwrctl-rework-a1b024158555 >> >> Best regards, >> -- >> Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> >> >> > > Excellent work, thanks for doing this. > > Tested on: sc8280xp-crd, RB5 and sm8450-hdk. > > Tested-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> > > Just a couple nits from my side under respective patches. > > Bart Tested on: qcs6490-rb3gen board with work in progress qps615 pcie switch Tested-by: Krishna chaitanya chundru <quic_krichai@quicinc.com> - Krishna Chaitanya. >
Hello, > This series reworks the PCI/pwrctl integration to ensure that the pwrctl drivers > are always probed before the PCI client drivers. This series addresses a race > condition when both pwrctl and pwrctl/pwrseq drivers probe parallely (even when > the later one probes last). One such issue was reported for the Qcom X13s > platform with WLAN module and fixed with 'commit a9aaf1ff88a8 ("power: > sequencing: request the WLAN enable GPIO as-is")'. > > Though the issue was fixed with a hack in the pwrseq driver, it was clear that > the issue is applicable to all pwrctl drivers. Hence, this series tries to > address the issue in the PCI/pwrctl integration. Applied to bwctrl, thank you! [01/05] PCI/pwrctl: Use of_platform_device_create() to create pwrctl devices https://git.kernel.org/pci/pci/c/d2b6619e7419 [02/05] PCI/pwrctl: Create pwrctl devices only if at least one power supply is present https://git.kernel.org/pci/pci/c/5f2710a4c275 [03/05] PCI/pwrctl: Ensure that the pwrctl drivers are probed before the PCI client drivers https://git.kernel.org/pci/pci/c/4c963d4c13b9 [04/05] PCI/pwrctl: Move pwrctl device creation to its own helper function https://git.kernel.org/pci/pci/c/73ae23a6af78 [05/05] PCI/pwrctl: Remove pwrctl device without iterating over all children of pwrctl parent https://git.kernel.org/pci/pci/c/5ccc52fd1e5a Krzysztof
On Mon, Nov 04, 2024 at 05:31:07AM +0900, Krzysztof Wilczyński wrote: > Hello, > > > This series reworks the PCI/pwrctl integration to ensure that the pwrctl drivers > > are always probed before the PCI client drivers. This series addresses a race > > condition when both pwrctl and pwrctl/pwrseq drivers probe parallely (even when > > the later one probes last). One such issue was reported for the Qcom X13s > > platform with WLAN module and fixed with 'commit a9aaf1ff88a8 ("power: > > sequencing: request the WLAN enable GPIO as-is")'. > > > > Though the issue was fixed with a hack in the pwrseq driver, it was clear that > > the issue is applicable to all pwrctl drivers. Hence, this series tries to > > address the issue in the PCI/pwrctl integration. > > Applied to bwctrl, thank you! Should be pci/pwrctl. bwctrl (bandwidth control) and pwrctl (power control) are quite different despite the confusingly similar names. > [01/05] PCI/pwrctl: Use of_platform_device_create() to create pwrctl devices > https://git.kernel.org/pci/pci/c/d2b6619e7419 > > [02/05] PCI/pwrctl: Create pwrctl devices only if at least one power supply is present > https://git.kernel.org/pci/pci/c/5f2710a4c275 > > [03/05] PCI/pwrctl: Ensure that the pwrctl drivers are probed before the PCI client drivers > https://git.kernel.org/pci/pci/c/4c963d4c13b9 > > [04/05] PCI/pwrctl: Move pwrctl device creation to its own helper function > https://git.kernel.org/pci/pci/c/73ae23a6af78 > > [05/05] PCI/pwrctl: Remove pwrctl device without iterating over all children of pwrctl parent > https://git.kernel.org/pci/pci/c/5ccc52fd1e5a > > Krzysztof
Hello, > > > This series reworks the PCI/pwrctl integration to ensure that the pwrctl drivers > > > are always probed before the PCI client drivers. This series addresses a race > > > condition when both pwrctl and pwrctl/pwrseq drivers probe parallely (even when > > > the later one probes last). One such issue was reported for the Qcom X13s > > > platform with WLAN module and fixed with 'commit a9aaf1ff88a8 ("power: > > > sequencing: request the WLAN enable GPIO as-is")'. > > > > > > Though the issue was fixed with a hack in the pwrseq driver, it was clear that > > > the issue is applicable to all pwrctl drivers. Hence, this series tries to > > > address the issue in the PCI/pwrctl integration. > > > > Applied to bwctrl, thank you! > > Should be pci/pwrctl. bwctrl (bandwidth control) and pwrctl (power > control) are quite different despite the confusingly similar names. Correct. I moved patches to the correct branch. Sorry about that! Krzysztof
Hi, This series reworks the PCI/pwrctl integration to ensure that the pwrctl drivers are always probed before the PCI client drivers. This series addresses a race condition when both pwrctl and pwrctl/pwrseq drivers probe parallely (even when the later one probes last). One such issue was reported for the Qcom X13s platform with WLAN module and fixed with 'commit a9aaf1ff88a8 ("power: sequencing: request the WLAN enable GPIO as-is")'. Though the issue was fixed with a hack in the pwrseq driver, it was clear that the issue is applicable to all pwrctl drivers. Hence, this series tries to address the issue in the PCI/pwrctl integration. - Mani Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> --- Manivannan Sadhasivam (5): PCI/pwrctl: Use of_platform_device_create() to create pwrctl devices PCI/pwrctl: Create pwrctl devices only if at least one power supply is present PCI/pwrctl: Ensure that the pwrctl drivers are probed before the PCI client drivers PCI/pwrctl: Move pwrctl device creation to its own helper function PCI/pwrctl: Remove pwrctl device without iterating over all children of pwrctl parent drivers/pci/bus.c | 64 +++++++++++++++++++++++++++++++++++++++++------ drivers/pci/of.c | 27 ++++++++++++++++++++ drivers/pci/pci.h | 5 ++++ drivers/pci/pwrctl/core.c | 10 -------- drivers/pci/remove.c | 17 ++++++------- 5 files changed, 96 insertions(+), 27 deletions(-) --- base-commit: 48dc7986beb60522eb217c0016f999cc7afaf0b7 change-id: 20241022-pci-pwrctl-rework-a1b024158555 Best regards,