| Message ID | 1432499823-27369-1-git-send-email-hauke@hauke-m.de (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
Hi Hauke, On 5/24/2015 1:37 PM, Hauke Mehrtens wrote: > The resources member in the struct was pointing to a stack variable and > is invalid after the the registration function returned. Remove this > pointer and add it a a parameter to the function. > > Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> > --- > drivers/pci/host/pcie-iproc-bcma.c | 4 +--- > drivers/pci/host/pcie-iproc-platform.c | 4 +--- > drivers/pci/host/pcie-iproc.c | 4 ++-- > drivers/pci/host/pcie-iproc.h | 3 +-- > 4 files changed, 5 insertions(+), 10 deletions(-) > > diff --git a/drivers/pci/host/pcie-iproc-bcma.c b/drivers/pci/host/pcie-iproc-bcma.c > index c318f19..f96b39e 100644 > --- a/drivers/pci/host/pcie-iproc-bcma.c > +++ b/drivers/pci/host/pcie-iproc-bcma.c > @@ -62,11 +62,9 @@ static int iproc_pcie_bcma_probe(struct bcma_device *bdev) > res_mem.flags = IORESOURCE_MEM; > pci_add_resource(&res, &res_mem); > > - pcie->resources = &res; > - > pcie->map_irq = iproc_pcie_bcma_map_irq; > > - ret = iproc_pcie_setup(pcie); > + ret = iproc_pcie_setup(pcie, &res); > if (ret) { > dev_err(pcie->dev, "PCIe controller setup failed\n"); > return ret; > diff --git a/drivers/pci/host/pcie-iproc-platform.c b/drivers/pci/host/pcie-iproc-platform.c > index c8aa06f..c5fe4c1 100644 > --- a/drivers/pci/host/pcie-iproc-platform.c > +++ b/drivers/pci/host/pcie-iproc-platform.c > @@ -69,11 +69,9 @@ static int iproc_pcie_pltfm_probe(struct platform_device *pdev) > return ret; > } > > - pcie->resources = &res; > - > pcie->map_irq = of_irq_parse_and_map_pci; > > - ret = iproc_pcie_setup(pcie); > + ret = iproc_pcie_setup(pcie, &res); > if (ret) { > dev_err(pcie->dev, "PCIe controller setup failed\n"); > return ret; > diff --git a/drivers/pci/host/pcie-iproc.c b/drivers/pci/host/pcie-iproc.c > index cef31f6..d77481e 100644 > --- a/drivers/pci/host/pcie-iproc.c > +++ b/drivers/pci/host/pcie-iproc.c > @@ -183,7 +183,7 @@ static void iproc_pcie_enable(struct iproc_pcie *pcie) > writel(SYS_RC_INTX_MASK, pcie->base + SYS_RC_INTX_EN); > } > > -int iproc_pcie_setup(struct iproc_pcie *pcie) > +int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res) > { > int ret; > struct pci_bus *bus; > @@ -211,7 +211,7 @@ int iproc_pcie_setup(struct iproc_pcie *pcie) > pcie->sysdata.private_data = pcie; > > bus = pci_create_root_bus(pcie->dev, 0, &iproc_pcie_ops, > - &pcie->sysdata, pcie->resources); > + &pcie->sysdata, res); > if (!bus) { > dev_err(pcie->dev, "unable to create PCI root bus\n"); > ret = -ENOMEM; > diff --git a/drivers/pci/host/pcie-iproc.h b/drivers/pci/host/pcie-iproc.h > index a333d4b..ba0a108 100644 > --- a/drivers/pci/host/pcie-iproc.h > +++ b/drivers/pci/host/pcie-iproc.h > @@ -29,7 +29,6 @@ > struct iproc_pcie { > struct device *dev; > void __iomem *base; > - struct list_head *resources; This means we do not want to keep a copy of the resources. In the future, if we need to add support to explicitly set up the inbound/outbound mapping window, we need to do it in iproc_pcie_setup. Is that the intention? Thanks, Ray > struct pci_sys_data sysdata; > struct pci_bus *root_bus; > struct phy *phy; > @@ -37,7 +36,7 @@ struct iproc_pcie { > int (*map_irq)(const struct pci_dev *, u8, u8); > }; > > -int iproc_pcie_setup(struct iproc_pcie *pcie); > +int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res); > int iproc_pcie_remove(struct iproc_pcie *pcie); > > #endif /* _PCIE_IPROC_H */ > -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 05/25/2015 07:10 PM, Ray Jui wrote: > Hi Hauke, > > On 5/24/2015 1:37 PM, Hauke Mehrtens wrote: >> The resources member in the struct was pointing to a stack variable and >> is invalid after the the registration function returned. Remove this >> pointer and add it a a parameter to the function. >> >> Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> >> --- >> drivers/pci/host/pcie-iproc-bcma.c | 4 +--- >> drivers/pci/host/pcie-iproc-platform.c | 4 +--- >> drivers/pci/host/pcie-iproc.c | 4 ++-- >> drivers/pci/host/pcie-iproc.h | 3 +-- >> 4 files changed, 5 insertions(+), 10 deletions(-) >> >> diff --git a/drivers/pci/host/pcie-iproc-bcma.c b/drivers/pci/host/pcie-iproc-bcma.c >> index c318f19..f96b39e 100644 >> --- a/drivers/pci/host/pcie-iproc-bcma.c >> +++ b/drivers/pci/host/pcie-iproc-bcma.c >> @@ -62,11 +62,9 @@ static int iproc_pcie_bcma_probe(struct bcma_device *bdev) >> res_mem.flags = IORESOURCE_MEM; >> pci_add_resource(&res, &res_mem); >> >> - pcie->resources = &res; >> - >> pcie->map_irq = iproc_pcie_bcma_map_irq; >> >> - ret = iproc_pcie_setup(pcie); >> + ret = iproc_pcie_setup(pcie, &res); >> if (ret) { >> dev_err(pcie->dev, "PCIe controller setup failed\n"); >> return ret; >> diff --git a/drivers/pci/host/pcie-iproc-platform.c b/drivers/pci/host/pcie-iproc-platform.c >> index c8aa06f..c5fe4c1 100644 >> --- a/drivers/pci/host/pcie-iproc-platform.c >> +++ b/drivers/pci/host/pcie-iproc-platform.c >> @@ -69,11 +69,9 @@ static int iproc_pcie_pltfm_probe(struct platform_device *pdev) >> return ret; >> } >> >> - pcie->resources = &res; >> - >> pcie->map_irq = of_irq_parse_and_map_pci; >> >> - ret = iproc_pcie_setup(pcie); >> + ret = iproc_pcie_setup(pcie, &res); >> if (ret) { >> dev_err(pcie->dev, "PCIe controller setup failed\n"); >> return ret; >> diff --git a/drivers/pci/host/pcie-iproc.c b/drivers/pci/host/pcie-iproc.c >> index cef31f6..d77481e 100644 >> --- a/drivers/pci/host/pcie-iproc.c >> +++ b/drivers/pci/host/pcie-iproc.c >> @@ -183,7 +183,7 @@ static void iproc_pcie_enable(struct iproc_pcie *pcie) >> writel(SYS_RC_INTX_MASK, pcie->base + SYS_RC_INTX_EN); >> } >> >> -int iproc_pcie_setup(struct iproc_pcie *pcie) >> +int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res) >> { >> int ret; >> struct pci_bus *bus; >> @@ -211,7 +211,7 @@ int iproc_pcie_setup(struct iproc_pcie *pcie) >> pcie->sysdata.private_data = pcie; >> >> bus = pci_create_root_bus(pcie->dev, 0, &iproc_pcie_ops, >> - &pcie->sysdata, pcie->resources); >> + &pcie->sysdata, res); >> if (!bus) { >> dev_err(pcie->dev, "unable to create PCI root bus\n"); >> ret = -ENOMEM; >> diff --git a/drivers/pci/host/pcie-iproc.h b/drivers/pci/host/pcie-iproc.h >> index a333d4b..ba0a108 100644 >> --- a/drivers/pci/host/pcie-iproc.h >> +++ b/drivers/pci/host/pcie-iproc.h >> @@ -29,7 +29,6 @@ >> struct iproc_pcie { >> struct device *dev; >> void __iomem *base; >> - struct list_head *resources; > > This means we do not want to keep a copy of the resources. In the > future, if we need to add support to explicitly set up the > inbound/outbound mapping window, we need to do it in iproc_pcie_setup. > Is that the intention? I haven't really thought about where to configure the memory mapping, but I thought it would be somewhere in iproc_pcie_setup() or an method called from there. If you need it after iproc_pcie_setup() finished we should embed the list into the struct iproc_pcie, because currently this pointer points to the stack. Hauke -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Hauke, On 15-05-25 03:48 PM, Hauke Mehrtens wrote: > On 05/25/2015 07:10 PM, Ray Jui wrote: >> Hi Hauke, >> >> On 5/24/2015 1:37 PM, Hauke Mehrtens wrote: >>> The resources member in the struct was pointing to a stack variable and >>> is invalid after the the registration function returned. Remove this >>> pointer and add it a a parameter to the function. >>> >>> Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> >>> --- >>> drivers/pci/host/pcie-iproc-bcma.c | 4 +--- >>> drivers/pci/host/pcie-iproc-platform.c | 4 +--- >>> drivers/pci/host/pcie-iproc.c | 4 ++-- >>> drivers/pci/host/pcie-iproc.h | 3 +-- >>> 4 files changed, 5 insertions(+), 10 deletions(-) >>> >>> diff --git a/drivers/pci/host/pcie-iproc-bcma.c b/drivers/pci/host/pcie-iproc-bcma.c >>> index c318f19..f96b39e 100644 >>> --- a/drivers/pci/host/pcie-iproc-bcma.c >>> +++ b/drivers/pci/host/pcie-iproc-bcma.c >>> @@ -62,11 +62,9 @@ static int iproc_pcie_bcma_probe(struct bcma_device *bdev) >>> res_mem.flags = IORESOURCE_MEM; >>> pci_add_resource(&res, &res_mem); >>> >>> - pcie->resources = &res; >>> - >>> pcie->map_irq = iproc_pcie_bcma_map_irq; >>> >>> - ret = iproc_pcie_setup(pcie); >>> + ret = iproc_pcie_setup(pcie, &res); >>> if (ret) { >>> dev_err(pcie->dev, "PCIe controller setup failed\n"); >>> return ret; >>> diff --git a/drivers/pci/host/pcie-iproc-platform.c b/drivers/pci/host/pcie-iproc-platform.c >>> index c8aa06f..c5fe4c1 100644 >>> --- a/drivers/pci/host/pcie-iproc-platform.c >>> +++ b/drivers/pci/host/pcie-iproc-platform.c >>> @@ -69,11 +69,9 @@ static int iproc_pcie_pltfm_probe(struct platform_device *pdev) >>> return ret; >>> } >>> >>> - pcie->resources = &res; >>> - >>> pcie->map_irq = of_irq_parse_and_map_pci; >>> >>> - ret = iproc_pcie_setup(pcie); >>> + ret = iproc_pcie_setup(pcie, &res); >>> if (ret) { >>> dev_err(pcie->dev, "PCIe controller setup failed\n"); >>> return ret; >>> diff --git a/drivers/pci/host/pcie-iproc.c b/drivers/pci/host/pcie-iproc.c >>> index cef31f6..d77481e 100644 >>> --- a/drivers/pci/host/pcie-iproc.c >>> +++ b/drivers/pci/host/pcie-iproc.c >>> @@ -183,7 +183,7 @@ static void iproc_pcie_enable(struct iproc_pcie *pcie) >>> writel(SYS_RC_INTX_MASK, pcie->base + SYS_RC_INTX_EN); >>> } >>> >>> -int iproc_pcie_setup(struct iproc_pcie *pcie) >>> +int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res) >>> { >>> int ret; >>> struct pci_bus *bus; >>> @@ -211,7 +211,7 @@ int iproc_pcie_setup(struct iproc_pcie *pcie) >>> pcie->sysdata.private_data = pcie; >>> >>> bus = pci_create_root_bus(pcie->dev, 0, &iproc_pcie_ops, >>> - &pcie->sysdata, pcie->resources); >>> + &pcie->sysdata, res); >>> if (!bus) { >>> dev_err(pcie->dev, "unable to create PCI root bus\n"); >>> ret = -ENOMEM; >>> diff --git a/drivers/pci/host/pcie-iproc.h b/drivers/pci/host/pcie-iproc.h >>> index a333d4b..ba0a108 100644 >>> --- a/drivers/pci/host/pcie-iproc.h >>> +++ b/drivers/pci/host/pcie-iproc.h >>> @@ -29,7 +29,6 @@ >>> struct iproc_pcie { >>> struct device *dev; >>> void __iomem *base; >>> - struct list_head *resources; >> >> This means we do not want to keep a copy of the resources. In the >> future, if we need to add support to explicitly set up the >> inbound/outbound mapping window, we need to do it in iproc_pcie_setup. >> Is that the intention? > > I haven't really thought about where to configure the memory mapping, > but I thought it would be somewhere in iproc_pcie_setup() or an method > called from there. > If you need it after iproc_pcie_setup() finished we should embed the > list into the struct iproc_pcie, because currently this pointer points > to the stack. > > Hauke > I think most likely I'll be adding the memory mapping logic in iproc_pcie_setup(), so your current patch should be fine. Reviewed-by: Ray Jui <rjui@broadcom.com> Tested-by: Ray Jui <rjui@broadcom.com> Thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Sun, May 24, 2015 at 10:37:02PM +0200, Hauke Mehrtens wrote: > The resources member in the struct was pointing to a stack variable and > is invalid after the the registration function returned. Remove this > pointer and add it a a parameter to the function. > > Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Applied both patches with Ray's Reviewed-by to pci/host-iproc for v4.2, thanks! > --- > drivers/pci/host/pcie-iproc-bcma.c | 4 +--- > drivers/pci/host/pcie-iproc-platform.c | 4 +--- > drivers/pci/host/pcie-iproc.c | 4 ++-- > drivers/pci/host/pcie-iproc.h | 3 +-- > 4 files changed, 5 insertions(+), 10 deletions(-) > > diff --git a/drivers/pci/host/pcie-iproc-bcma.c b/drivers/pci/host/pcie-iproc-bcma.c > index c318f19..f96b39e 100644 > --- a/drivers/pci/host/pcie-iproc-bcma.c > +++ b/drivers/pci/host/pcie-iproc-bcma.c > @@ -62,11 +62,9 @@ static int iproc_pcie_bcma_probe(struct bcma_device *bdev) > res_mem.flags = IORESOURCE_MEM; > pci_add_resource(&res, &res_mem); > > - pcie->resources = &res; > - > pcie->map_irq = iproc_pcie_bcma_map_irq; > > - ret = iproc_pcie_setup(pcie); > + ret = iproc_pcie_setup(pcie, &res); > if (ret) { > dev_err(pcie->dev, "PCIe controller setup failed\n"); > return ret; > diff --git a/drivers/pci/host/pcie-iproc-platform.c b/drivers/pci/host/pcie-iproc-platform.c > index c8aa06f..c5fe4c1 100644 > --- a/drivers/pci/host/pcie-iproc-platform.c > +++ b/drivers/pci/host/pcie-iproc-platform.c > @@ -69,11 +69,9 @@ static int iproc_pcie_pltfm_probe(struct platform_device *pdev) > return ret; > } > > - pcie->resources = &res; > - > pcie->map_irq = of_irq_parse_and_map_pci; > > - ret = iproc_pcie_setup(pcie); > + ret = iproc_pcie_setup(pcie, &res); > if (ret) { > dev_err(pcie->dev, "PCIe controller setup failed\n"); > return ret; > diff --git a/drivers/pci/host/pcie-iproc.c b/drivers/pci/host/pcie-iproc.c > index cef31f6..d77481e 100644 > --- a/drivers/pci/host/pcie-iproc.c > +++ b/drivers/pci/host/pcie-iproc.c > @@ -183,7 +183,7 @@ static void iproc_pcie_enable(struct iproc_pcie *pcie) > writel(SYS_RC_INTX_MASK, pcie->base + SYS_RC_INTX_EN); > } > > -int iproc_pcie_setup(struct iproc_pcie *pcie) > +int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res) > { > int ret; > struct pci_bus *bus; > @@ -211,7 +211,7 @@ int iproc_pcie_setup(struct iproc_pcie *pcie) > pcie->sysdata.private_data = pcie; > > bus = pci_create_root_bus(pcie->dev, 0, &iproc_pcie_ops, > - &pcie->sysdata, pcie->resources); > + &pcie->sysdata, res); > if (!bus) { > dev_err(pcie->dev, "unable to create PCI root bus\n"); > ret = -ENOMEM; > diff --git a/drivers/pci/host/pcie-iproc.h b/drivers/pci/host/pcie-iproc.h > index a333d4b..ba0a108 100644 > --- a/drivers/pci/host/pcie-iproc.h > +++ b/drivers/pci/host/pcie-iproc.h > @@ -29,7 +29,6 @@ > struct iproc_pcie { > struct device *dev; > void __iomem *base; > - struct list_head *resources; > struct pci_sys_data sysdata; > struct pci_bus *root_bus; > struct phy *phy; > @@ -37,7 +36,7 @@ struct iproc_pcie { > int (*map_irq)(const struct pci_dev *, u8, u8); > }; > > -int iproc_pcie_setup(struct iproc_pcie *pcie); > +int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res); > int iproc_pcie_remove(struct iproc_pcie *pcie); > > #endif /* _PCIE_IPROC_H */ > -- > 2.1.4 > -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/pci/host/pcie-iproc-bcma.c b/drivers/pci/host/pcie-iproc-bcma.c index c318f19..f96b39e 100644 --- a/drivers/pci/host/pcie-iproc-bcma.c +++ b/drivers/pci/host/pcie-iproc-bcma.c @@ -62,11 +62,9 @@ static int iproc_pcie_bcma_probe(struct bcma_device *bdev) res_mem.flags = IORESOURCE_MEM; pci_add_resource(&res, &res_mem); - pcie->resources = &res; - pcie->map_irq = iproc_pcie_bcma_map_irq; - ret = iproc_pcie_setup(pcie); + ret = iproc_pcie_setup(pcie, &res); if (ret) { dev_err(pcie->dev, "PCIe controller setup failed\n"); return ret; diff --git a/drivers/pci/host/pcie-iproc-platform.c b/drivers/pci/host/pcie-iproc-platform.c index c8aa06f..c5fe4c1 100644 --- a/drivers/pci/host/pcie-iproc-platform.c +++ b/drivers/pci/host/pcie-iproc-platform.c @@ -69,11 +69,9 @@ static int iproc_pcie_pltfm_probe(struct platform_device *pdev) return ret; } - pcie->resources = &res; - pcie->map_irq = of_irq_parse_and_map_pci; - ret = iproc_pcie_setup(pcie); + ret = iproc_pcie_setup(pcie, &res); if (ret) { dev_err(pcie->dev, "PCIe controller setup failed\n"); return ret; diff --git a/drivers/pci/host/pcie-iproc.c b/drivers/pci/host/pcie-iproc.c index cef31f6..d77481e 100644 --- a/drivers/pci/host/pcie-iproc.c +++ b/drivers/pci/host/pcie-iproc.c @@ -183,7 +183,7 @@ static void iproc_pcie_enable(struct iproc_pcie *pcie) writel(SYS_RC_INTX_MASK, pcie->base + SYS_RC_INTX_EN); } -int iproc_pcie_setup(struct iproc_pcie *pcie) +int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res) { int ret; struct pci_bus *bus; @@ -211,7 +211,7 @@ int iproc_pcie_setup(struct iproc_pcie *pcie) pcie->sysdata.private_data = pcie; bus = pci_create_root_bus(pcie->dev, 0, &iproc_pcie_ops, - &pcie->sysdata, pcie->resources); + &pcie->sysdata, res); if (!bus) { dev_err(pcie->dev, "unable to create PCI root bus\n"); ret = -ENOMEM; diff --git a/drivers/pci/host/pcie-iproc.h b/drivers/pci/host/pcie-iproc.h index a333d4b..ba0a108 100644 --- a/drivers/pci/host/pcie-iproc.h +++ b/drivers/pci/host/pcie-iproc.h @@ -29,7 +29,6 @@ struct iproc_pcie { struct device *dev; void __iomem *base; - struct list_head *resources; struct pci_sys_data sysdata; struct pci_bus *root_bus; struct phy *phy; @@ -37,7 +36,7 @@ struct iproc_pcie { int (*map_irq)(const struct pci_dev *, u8, u8); }; -int iproc_pcie_setup(struct iproc_pcie *pcie); +int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res); int iproc_pcie_remove(struct iproc_pcie *pcie); #endif /* _PCIE_IPROC_H */
The resources member in the struct was pointing to a stack variable and is invalid after the the registration function returned. Remove this pointer and add it a a parameter to the function. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> --- drivers/pci/host/pcie-iproc-bcma.c | 4 +--- drivers/pci/host/pcie-iproc-platform.c | 4 +--- drivers/pci/host/pcie-iproc.c | 4 ++-- drivers/pci/host/pcie-iproc.h | 3 +-- 4 files changed, 5 insertions(+), 10 deletions(-)