From: John Rose Date: Wed, 2 Nov 2005 16:29:55 +0000 (-0600) Subject: [PATCH] ppc64: Fix add notifier crashes X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8902e87f1fc72740a40686a31ca07e6c2cf1f0f2;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git [PATCH] ppc64: Fix add notifier crashes The extraction of PCI stuff from struct device_node left some false assumptions in notifier code. As a result, dynamic add crashes when non-PCI nodes are added. This patch fixes these assumptions. Signed-off-by: John Rose Signed-off-by: Paul Mackerras --- diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c index 9e90d41131d8..a73faafaac8c 100644 --- a/arch/powerpc/platforms/pseries/iommu.c +++ b/arch/powerpc/platforms/pseries/iommu.c @@ -498,7 +498,7 @@ static int iommu_reconfig_notifier(struct notifier_block *nb, unsigned long acti switch (action) { case PSERIES_RECONFIG_REMOVE: - if (pci->iommu_table && + if (pci && pci->iommu_table && get_property(np, "ibm,dma-window", NULL)) iommu_free_table(np); break; diff --git a/arch/ppc64/kernel/pci_dn.c b/arch/ppc64/kernel/pci_dn.c index 493bbe43f5b4..1a443a7ada4c 100644 --- a/arch/ppc64/kernel/pci_dn.c +++ b/arch/ppc64/kernel/pci_dn.c @@ -181,13 +181,14 @@ EXPORT_SYMBOL(fetch_dev_dn); static int pci_dn_reconfig_notifier(struct notifier_block *nb, unsigned long action, void *node) { struct device_node *np = node; - struct pci_dn *pci; + struct pci_dn *pci = NULL; int err = NOTIFY_OK; switch (action) { case PSERIES_RECONFIG_ADD: pci = np->parent->data; - update_dn_pci_info(np, pci->phb); + if (pci) + update_dn_pci_info(np, pci->phb); break; default: err = NOTIFY_DONE;