| Message ID | 20221005135852.22634-1-manivannan.sadhasivam@linaro.org (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | PCI: qcom-ep: Fix disabling global_irq in error path | expand |
On Wed, Oct 05, 2022 at 07:28:52PM +0530, Manivannan Sadhasivam wrote: > After commit 6a534df3da88 ("PCI: qcom-ep: Disable IRQs during driver > remove"), the global irq is stored in the "global_irq" member of pcie_ep > structure. This eliminates the need of local "irq" variable but that > commit didn't remove the "irq" variable usage completely and it is still > used for disable_irq() in error path which is wrong since the variable is > uninitialized. > > Fix this by removing the local "irq" variable and using > "pcie_ep->global_irq" for disable_irq() in error path. > > Reported-by: kernel test robot <lkp@intel.com> > Fixes: 6a534df3da88 ("PCI: qcom-ep: Disable IRQs during driver remove") > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> For today's "next" branch, I dropped 6a534df3da88 and the subsequent patches. Hopefully Lorenzo can squash this fix into 6a534df3da88. I could clone the branch and squash it myself, but that's pretty fiddly and I usually mess it up. > --- > drivers/pci/controller/dwc/pcie-qcom-ep.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/pci/controller/dwc/pcie-qcom-ep.c b/drivers/pci/controller/dwc/pcie-qcom-ep.c > index 16bb8f166c3b..00a0728d5ecd 100644 > --- a/drivers/pci/controller/dwc/pcie-qcom-ep.c > +++ b/drivers/pci/controller/dwc/pcie-qcom-ep.c > @@ -614,7 +614,7 @@ static irqreturn_t qcom_pcie_ep_perst_irq_thread(int irq, void *data) > static int qcom_pcie_ep_enable_irq_resources(struct platform_device *pdev, > struct qcom_pcie_ep *pcie_ep) > { > - int irq, ret; > + int ret; > > pcie_ep->global_irq = platform_get_irq_byname(pdev, "global"); > if (pcie_ep->global_irq < 0) > @@ -637,7 +637,7 @@ static int qcom_pcie_ep_enable_irq_resources(struct platform_device *pdev, > "perst_irq", pcie_ep); > if (ret) { > dev_err(&pdev->dev, "Failed to request PERST IRQ\n"); > - disable_irq(irq); > + disable_irq(pcie_ep->global_irq); > return ret; > } > > -- > 2.25.1 >
On Wed, Oct 05, 2022 at 12:35:29PM -0500, Bjorn Helgaas wrote: > On Wed, Oct 05, 2022 at 07:28:52PM +0530, Manivannan Sadhasivam wrote: > > After commit 6a534df3da88 ("PCI: qcom-ep: Disable IRQs during driver > > remove"), the global irq is stored in the "global_irq" member of pcie_ep > > structure. This eliminates the need of local "irq" variable but that > > commit didn't remove the "irq" variable usage completely and it is still > > used for disable_irq() in error path which is wrong since the variable is > > uninitialized. > > > > Fix this by removing the local "irq" variable and using > > "pcie_ep->global_irq" for disable_irq() in error path. > > > > Reported-by: kernel test robot <lkp@intel.com> > > Fixes: 6a534df3da88 ("PCI: qcom-ep: Disable IRQs during driver remove") > > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> > > For today's "next" branch, I dropped 6a534df3da88 and the subsequent > patches. Hopefully Lorenzo can squash this fix into 6a534df3da88. Done - the pci/qcom branch successfully passed kbot's tests as well. Lorenzo
On Thu, Oct 06, 2022 at 08:35:34AM +0200, Lorenzo Pieralisi wrote: > On Wed, Oct 05, 2022 at 12:35:29PM -0500, Bjorn Helgaas wrote: > > On Wed, Oct 05, 2022 at 07:28:52PM +0530, Manivannan Sadhasivam wrote: > > > After commit 6a534df3da88 ("PCI: qcom-ep: Disable IRQs during driver > > > remove"), the global irq is stored in the "global_irq" member of pcie_ep > > > structure. This eliminates the need of local "irq" variable but that > > > commit didn't remove the "irq" variable usage completely and it is still > > > used for disable_irq() in error path which is wrong since the variable is > > > uninitialized. > > > > > > Fix this by removing the local "irq" variable and using > > > "pcie_ep->global_irq" for disable_irq() in error path. > > > > > > Reported-by: kernel test robot <lkp@intel.com> > > > Fixes: 6a534df3da88 ("PCI: qcom-ep: Disable IRQs during driver remove") > > > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> > > > > For today's "next" branch, I dropped 6a534df3da88 and the subsequent > > patches. Hopefully Lorenzo can squash this fix into 6a534df3da88. > > Done - the pci/qcom branch successfully passed kbot's tests as well. Thanks, picked this up yesterday :) Bjorn
diff --git a/drivers/pci/controller/dwc/pcie-qcom-ep.c b/drivers/pci/controller/dwc/pcie-qcom-ep.c index 16bb8f166c3b..00a0728d5ecd 100644 --- a/drivers/pci/controller/dwc/pcie-qcom-ep.c +++ b/drivers/pci/controller/dwc/pcie-qcom-ep.c @@ -614,7 +614,7 @@ static irqreturn_t qcom_pcie_ep_perst_irq_thread(int irq, void *data) static int qcom_pcie_ep_enable_irq_resources(struct platform_device *pdev, struct qcom_pcie_ep *pcie_ep) { - int irq, ret; + int ret; pcie_ep->global_irq = platform_get_irq_byname(pdev, "global"); if (pcie_ep->global_irq < 0) @@ -637,7 +637,7 @@ static int qcom_pcie_ep_enable_irq_resources(struct platform_device *pdev, "perst_irq", pcie_ep); if (ret) { dev_err(&pdev->dev, "Failed to request PERST IRQ\n"); - disable_irq(irq); + disable_irq(pcie_ep->global_irq); return ret; }
After commit 6a534df3da88 ("PCI: qcom-ep: Disable IRQs during driver remove"), the global irq is stored in the "global_irq" member of pcie_ep structure. This eliminates the need of local "irq" variable but that commit didn't remove the "irq" variable usage completely and it is still used for disable_irq() in error path which is wrong since the variable is uninitialized. Fix this by removing the local "irq" variable and using "pcie_ep->global_irq" for disable_irq() in error path. Reported-by: kernel test robot <lkp@intel.com> Fixes: 6a534df3da88 ("PCI: qcom-ep: Disable IRQs during driver remove") Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> --- drivers/pci/controller/dwc/pcie-qcom-ep.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)