| Message ID | 1369489718-25869-4-git-send-email-jiang.liu@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On Sat, May 25, 2013 at 7:48 AM, Jiang Liu <liuj97@gmail.com> wrote: > From: Gu Zheng <guz.fnst@cn.fujitsu.com> > > Use the new pci_alloc_dev(bus) to replace the existing using of > alloc_pci_dev(void). > ... > diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c > index 26df9c8..d5d18a0 100644 > --- a/drivers/pci/probe.c > +++ b/drivers/pci/probe.c > @@ -1130,6 +1130,7 @@ static void pci_release_dev(struct device *dev) > struct pci_dev *pci_dev; > > pci_dev = to_pci_dev(dev); > + pci_bus_put(pci_dev->bus); > pci_release_capabilities(pci_dev); > pci_release_of_node(pci_dev); > kfree(pci_dev); I think we should drop the pci_bus reference *last* (before the kfree). Otherwise, we have to audit pci_release_capabilities() and pci_release_of_node() to make sure they don't use pci_dev->bus. I made this change on my branch already; just let me know if you object. Bjorn -- 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 Thu 06 Jun 2013 04:07:18 AM CST, Bjorn Helgaas wrote: > On Sat, May 25, 2013 at 7:48 AM, Jiang Liu <liuj97@gmail.com> wrote: >> From: Gu Zheng <guz.fnst@cn.fujitsu.com> >> >> Use the new pci_alloc_dev(bus) to replace the existing using of >> alloc_pci_dev(void). >> ... > >> diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c >> index 26df9c8..d5d18a0 100644 >> --- a/drivers/pci/probe.c >> +++ b/drivers/pci/probe.c >> @@ -1130,6 +1130,7 @@ static void pci_release_dev(struct device *dev) >> struct pci_dev *pci_dev; >> >> pci_dev = to_pci_dev(dev); >> + pci_bus_put(pci_dev->bus); >> pci_release_capabilities(pci_dev); >> pci_release_of_node(pci_dev); >> kfree(pci_dev); > > I think we should drop the pci_bus reference *last* (before the > kfree). Otherwise, we have to audit pci_release_capabilities() and > pci_release_of_node() to make sure they don't use pci_dev->bus. > > I made this change on my branch already; just let me know if you object. Hi Bjorn, You are right, thanks for fixing it. > > Bjorn -- 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/arch/powerpc/kernel/pci_of_scan.c b/arch/powerpc/kernel/pci_of_scan.c index d2d407d..6b0ba58 100644 --- a/arch/powerpc/kernel/pci_of_scan.c +++ b/arch/powerpc/kernel/pci_of_scan.c @@ -128,7 +128,7 @@ struct pci_dev *of_create_pci_dev(struct device_node *node, const char *type; struct pci_slot *slot; - dev = alloc_pci_dev(); + dev = pci_alloc_dev(bus); if (!dev) return NULL; type = of_get_property(node, "device_type", NULL); @@ -137,7 +137,6 @@ struct pci_dev *of_create_pci_dev(struct device_node *node, pr_debug(" create device, devfn: %x, type: %s\n", devfn, type); - dev->bus = bus; dev->dev.of_node = of_node_get(node); dev->dev.parent = bus->bridge; dev->dev.bus = &pci_bus_type; diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c index 972892a..b16f624 100644 --- a/arch/sparc/kernel/pci.c +++ b/arch/sparc/kernel/pci.c @@ -254,7 +254,7 @@ static struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm, const char *type; u32 class; - dev = alloc_pci_dev(); + dev = pci_alloc_dev(bus); if (!dev) return NULL; @@ -281,7 +281,6 @@ static struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm, printk(" create device, devfn: %x, type: %s\n", devfn, type); - dev->bus = bus; dev->sysdata = node; dev->dev.parent = bus->bridge; dev->dev.bus = &pci_bus_type; diff --git a/drivers/char/agp/alpha-agp.c b/drivers/char/agp/alpha-agp.c index dd84af4..199b8e9 100644 --- a/drivers/char/agp/alpha-agp.c +++ b/drivers/char/agp/alpha-agp.c @@ -174,7 +174,7 @@ alpha_core_agp_setup(void) /* * Build a fake pci_dev struct */ - pdev = alloc_pci_dev(); + pdev = pci_alloc_dev(NULL); if (!pdev) return -ENOMEM; pdev->vendor = 0xffff; diff --git a/drivers/char/agp/parisc-agp.c b/drivers/char/agp/parisc-agp.c index 94821ab..bf5d247 100644 --- a/drivers/char/agp/parisc-agp.c +++ b/drivers/char/agp/parisc-agp.c @@ -333,7 +333,7 @@ parisc_agp_setup(void __iomem *ioc_hpa, void __iomem *lba_hpa) struct agp_bridge_data *bridge; int error = 0; - fake_bridge_dev = alloc_pci_dev(); + fake_bridge_dev = pci_alloc_dev(NULL); if (!fake_bridge_dev) { error = -ENOMEM; goto fail; diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c index c93071d..2652ca0 100644 --- a/drivers/pci/iov.c +++ b/drivers/pci/iov.c @@ -75,18 +75,20 @@ static int virtfn_add(struct pci_dev *dev, int id, int reset) struct pci_dev *virtfn; struct resource *res; struct pci_sriov *iov = dev->sriov; + struct pci_bus *bus; - virtfn = alloc_pci_dev(); + virtfn = pci_alloc_dev(NULL); if (!virtfn) return -ENOMEM; mutex_lock(&iov->dev->sriov->lock); - virtfn->bus = virtfn_add_bus(dev->bus, virtfn_bus(dev, id)); - if (!virtfn->bus) { + bus = virtfn_add_bus(dev->bus, virtfn_bus(dev, id)); + if (!bus) { kfree(virtfn); mutex_unlock(&iov->dev->sriov->lock); return -ENOMEM; } + virtfn->bus = pci_bus_get(bus); virtfn->devfn = virtfn_devfn(dev, id); virtfn->vendor = dev->vendor; pci_read_config_word(dev, iov->pos + PCI_SRIOV_VF_DID, &virtfn->device); diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 26df9c8..d5d18a0 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1130,6 +1130,7 @@ static void pci_release_dev(struct device *dev) struct pci_dev *pci_dev; pci_dev = to_pci_dev(dev); + pci_bus_put(pci_dev->bus); pci_release_capabilities(pci_dev); pci_release_of_node(pci_dev); kfree(pci_dev); @@ -1269,11 +1270,10 @@ static struct pci_dev *pci_scan_device(struct pci_bus *bus, int devfn) if (!pci_bus_read_dev_vendor_id(bus, devfn, &l, 60*1000)) return NULL; - dev = alloc_pci_dev(); + dev = pci_alloc_dev(bus); if (!dev) return NULL; - dev->bus = bus; dev->devfn = devfn; dev->vendor = l & 0xffff; dev->device = (l >> 16) & 0xffff; @@ -1281,6 +1281,7 @@ static struct pci_dev *pci_scan_device(struct pci_bus *bus, int devfn) pci_set_of_node(dev); if (pci_setup_device(dev)) { + pci_bus_put(dev->bus); kfree(dev); return NULL; } diff --git a/drivers/scsi/megaraid.c b/drivers/scsi/megaraid.c index 846f475f..90c95a3 100644 --- a/drivers/scsi/megaraid.c +++ b/drivers/scsi/megaraid.c @@ -2026,7 +2026,7 @@ megaraid_abort_and_reset(adapter_t *adapter, Scsi_Cmnd *cmd, int aor) static inline int make_local_pdev(adapter_t *adapter, struct pci_dev **pdev) { - *pdev = alloc_pci_dev(); + *pdev = pci_alloc_dev(NULL); if( *pdev == NULL ) return -1;