From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexey Kardashevskiy Subject: Re: [PATCH v7 33/50] powerpc/pci: Export pci_traverse_device_nodes() Date: Wed, 18 Nov 2015 14:14:59 +1100 Message-ID: <564BED33.6040903@ozlabs.ru> References: <1446642770-4681-1-git-send-email-gwshan@linux.vnet.ibm.com> <1446642770-4681-34-git-send-email-gwshan@linux.vnet.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=koi8-r; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1446642770-4681-34-git-send-email-gwshan@linux.vnet.ibm.com> Sender: linux-pci-owner@vger.kernel.org To: Gavin Shan , linuxppc-dev@lists.ozlabs.org Cc: linux-pci@vger.kernel.org, devicetree@vger.kernel.org, benh@kernel.crashing.org, mpe@ellerman.id.au, bhelgaas@google.com, grant.likely@linaro.org, robherring2@gmail.com, panto@antoniou-consulting.com, frowand.list@gmail.com List-Id: devicetree@vger.kernel.org On 11/05/2015 12:12 AM, Gavin Shan wrote: > This renames traverse_pci_devices() to pci_traverse_device_nodes(). Why? pci_traverse_device_nodes() is not moved to some more generic header where is would be required to have a standard prefix. And the ppc-pci.h header does not use any standard prefix so the point of renaming is unclear. traverse_pci_dn() is still there and it has "traverse", "pci" and "device node" (abbreviated as "dn") in it so pci_traverse_device_nodes is more confusing name than traverse_pci_devices. Cannot we just get rid of one of them? Also the subject line says "Export" but nothing gets exported in this patch - the visibility of pci_traverse_device_nodes() remains unchanged. > The function traverses all subordinate device nodes of the specified > one. Also, below cleanup applied to the function. No logical changes > introduced. > > * Rename "pre" to "fn". > * Avoid assignment in if condition reported from checkpatch.pl. > > Signed-off-by: Gavin Shan > --- > arch/powerpc/include/asm/ppc-pci.h | 6 +++--- > arch/powerpc/kernel/pci_dn.c | 14 +++++++++----- > arch/powerpc/platforms/pseries/msi.c | 4 ++-- > 3 files changed, 14 insertions(+), 10 deletions(-) > > diff --git a/arch/powerpc/include/asm/ppc-pci.h b/arch/powerpc/include/asm/ppc-pci.h > index ca0c5bf..8753e4e 100644 > --- a/arch/powerpc/include/asm/ppc-pci.h > +++ b/arch/powerpc/include/asm/ppc-pci.h > @@ -33,9 +33,9 @@ extern struct pci_dev *isa_bridge_pcidev; /* may be NULL if no ISA bus */ > struct device_node; > struct pci_dn; > > -typedef void *(*traverse_func)(struct device_node *me, void *data); > -void *traverse_pci_devices(struct device_node *start, traverse_func pre, > - void *data); > +void *pci_traverse_device_nodes(struct device_node *start, > + void *(*fn)(struct device_node *, void *), > + void *data); > void *traverse_pci_dn(struct pci_dn *root, > void *(*fn)(struct pci_dn *, void *), > void *data); > diff --git a/arch/powerpc/kernel/pci_dn.c b/arch/powerpc/kernel/pci_dn.c > index 7f877a4..aa4110f 100644 > --- a/arch/powerpc/kernel/pci_dn.c > +++ b/arch/powerpc/kernel/pci_dn.c > @@ -355,8 +355,9 @@ EXPORT_SYMBOL_GPL(pci_remove_device_node_info); > * one of these nodes we also assume its siblings are non-pci for > * performance. > */ > -void *traverse_pci_devices(struct device_node *start, traverse_func pre, > - void *data) > +void *pci_traverse_device_nodes(struct device_node *start, > + void *(*fn)(struct device_node *, void *), > + void *data) > { > struct device_node *dn, *nextdn; > void *ret; > @@ -371,8 +372,11 @@ void *traverse_pci_devices(struct device_node *start, traverse_func pre, > if (classp) > class = of_read_number(classp, 1); > > - if (pre && ((ret = pre(dn, data)) != NULL)) > - return ret; > + if (fn) { > + ret = fn(dn, data); > + if (ret) > + return ret; > + } > > /* If we are a PCI bridge, go down */ > if (dn->child && ((class >> 8) == PCI_CLASS_BRIDGE_PCI || > @@ -470,7 +474,7 @@ void pci_devs_phb_init_dynamic(struct pci_controller *phb) > } > > /* Update dn->phb ptrs for new phb and children devices */ > - traverse_pci_devices(dn, add_pdn, phb); > + pci_traverse_device_nodes(dn, add_pdn, phb); > } > > /** > diff --git a/arch/powerpc/platforms/pseries/msi.c b/arch/powerpc/platforms/pseries/msi.c > index 272e9ec..543a638 100644 > --- a/arch/powerpc/platforms/pseries/msi.c > +++ b/arch/powerpc/platforms/pseries/msi.c > @@ -305,7 +305,7 @@ static int msi_quota_for_device(struct pci_dev *dev, int request) > memset(&counts, 0, sizeof(struct msi_counts)); > > /* Work out how many devices we have below this PE */ > - traverse_pci_devices(pe_dn, count_non_bridge_devices, &counts); > + pci_traverse_device_nodes(pe_dn, count_non_bridge_devices, &counts); > > if (counts.num_devices == 0) { > pr_err("rtas_msi: found 0 devices under PE for %s\n", > @@ -320,7 +320,7 @@ static int msi_quota_for_device(struct pci_dev *dev, int request) > /* else, we have some more calculating to do */ > counts.requestor = pci_device_to_OF_node(dev); > counts.request = request; > - traverse_pci_devices(pe_dn, count_spare_msis, &counts); > + pci_traverse_device_nodes(pe_dn, count_spare_msis, &counts); > > /* If the quota isn't an integer multiple of the total, we can > * use the remainder as spare MSIs for anyone that wants them. */ > -- Alexey