* [PATCH] PCI: qcom-ep: Fix disabling global_irq in error path
@ 2022-10-05 13:58 Manivannan Sadhasivam
2022-10-05 17:35 ` Bjorn Helgaas
0 siblings, 1 reply; 4+ messages in thread
From: Manivannan Sadhasivam @ 2022-10-05 13:58 UTC (permalink / raw)
To: lpieralisi
Cc: kw, bhelgaas, linux-pci, robh, linux-arm-msm, linux-kernel,
Manivannan Sadhasivam, kernel test robot
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(-)
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
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] PCI: qcom-ep: Fix disabling global_irq in error path
2022-10-05 13:58 [PATCH] PCI: qcom-ep: Fix disabling global_irq in error path Manivannan Sadhasivam
@ 2022-10-05 17:35 ` Bjorn Helgaas
2022-10-06 6:35 ` Lorenzo Pieralisi
0 siblings, 1 reply; 4+ messages in thread
From: Bjorn Helgaas @ 2022-10-05 17:35 UTC (permalink / raw)
To: Manivannan Sadhasivam
Cc: lpieralisi, kw, bhelgaas, linux-pci, robh, linux-arm-msm,
linux-kernel, kernel test robot
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
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] PCI: qcom-ep: Fix disabling global_irq in error path
2022-10-05 17:35 ` Bjorn Helgaas
@ 2022-10-06 6:35 ` Lorenzo Pieralisi
2022-10-06 16:07 ` Bjorn Helgaas
0 siblings, 1 reply; 4+ messages in thread
From: Lorenzo Pieralisi @ 2022-10-06 6:35 UTC (permalink / raw)
To: Bjorn Helgaas
Cc: Manivannan Sadhasivam, kw, bhelgaas, linux-pci, robh,
linux-arm-msm, linux-kernel, kernel test robot
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
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] PCI: qcom-ep: Fix disabling global_irq in error path
2022-10-06 6:35 ` Lorenzo Pieralisi
@ 2022-10-06 16:07 ` Bjorn Helgaas
0 siblings, 0 replies; 4+ messages in thread
From: Bjorn Helgaas @ 2022-10-06 16:07 UTC (permalink / raw)
To: Lorenzo Pieralisi
Cc: Manivannan Sadhasivam, kw, bhelgaas, linux-pci, robh,
linux-arm-msm, linux-kernel, kernel test robot
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
^ permalink raw reply [flat|nested] 4+ messages in thread
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2022-10-05 13:58 [PATCH] PCI: qcom-ep: Fix disabling global_irq in error path Manivannan Sadhasivam
2022-10-05 17:35 ` Bjorn Helgaas
2022-10-06 6:35 ` Lorenzo Pieralisi
2022-10-06 16:07 ` Bjorn Helgaas
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