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[204.195.35.107]) by smtp.gmail.com with ESMTPSA id y197-v6sm36409118pfg.184.2018.05.23.10.48.23 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 23 May 2018 10:48:23 -0700 (PDT) From: Stephen Hemminger X-Google-Original-From: Stephen Hemminger To: bhelgaas@google.com, kys@microsoft.com, haiyangz@microsoft.com, lorenzo.pieralisi@arm.com Cc: devel@linuxdriverproject.org, linux-pci@vger.kernel.org, Stephen Hemminger Subject: [PATCH 1/3] PCI: hv: remove unused reason for refcount handler Date: Wed, 23 May 2018 10:11:12 -0700 Message-Id: <20180523171114.5136-2-sthemmin@microsoft.com> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180523171114.5136-1-sthemmin@microsoft.com> References: <20180523171114.5136-1-sthemmin@microsoft.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org The get/put functions were taking a reason code. This appears to be a debug infrastructure that is no longer used. Move the functions to start of file to eliminate need for forward declaration. Forward declarations are discouraged on Linux. Signed-off-by: Stephen Hemminger --- drivers/pci/host/pci-hyperv.c | 70 +++++++++++++---------------------- 1 file changed, 26 insertions(+), 44 deletions(-) diff --git a/drivers/pci/host/pci-hyperv.c b/drivers/pci/host/pci-hyperv.c index 50cdefe3f6d3..505453e23c22 100644 --- a/drivers/pci/host/pci-hyperv.c +++ b/drivers/pci/host/pci-hyperv.c @@ -488,17 +488,6 @@ enum hv_pcichild_state { hv_pcichild_maximum }; -enum hv_pcidev_ref_reason { - hv_pcidev_ref_invalid = 0, - hv_pcidev_ref_initial, - hv_pcidev_ref_by_slot, - hv_pcidev_ref_packet, - hv_pcidev_ref_pnp, - hv_pcidev_ref_childlist, - hv_pcidev_irqdata, - hv_pcidev_ref_max -}; - struct hv_pci_dev { /* List protected by pci_rescan_remove_lock */ struct list_head list_entry; @@ -548,10 +537,17 @@ static void hv_pci_generic_compl(void *context, struct pci_response *resp, static struct hv_pci_dev *get_pcichild_wslot(struct hv_pcibus_device *hbus, u32 wslot); -static void get_pcichild(struct hv_pci_dev *hv_pcidev, - enum hv_pcidev_ref_reason reason); -static void put_pcichild(struct hv_pci_dev *hv_pcidev, - enum hv_pcidev_ref_reason reason); + +static void get_pcichild(struct hv_pci_dev *hpdev) +{ + refcount_inc(&hpdev->refs); +} + +static void put_pcichild(struct hv_pci_dev *hpdev) +{ + if (refcount_dec_and_test(&hpdev->refs)) + kfree(hpdev); +} static void get_hvpcibus(struct hv_pcibus_device *hv_pcibus); static void put_hvpcibus(struct hv_pcibus_device *hv_pcibus); @@ -762,7 +758,7 @@ static int hv_pcifront_read_config(struct pci_bus *bus, unsigned int devfn, _hv_pcifront_read_config(hpdev, where, size, val); - put_pcichild(hpdev, hv_pcidev_ref_by_slot); + put_pcichild(hpdev); return PCIBIOS_SUCCESSFUL; } @@ -790,7 +786,7 @@ static int hv_pcifront_write_config(struct pci_bus *bus, unsigned int devfn, _hv_pcifront_write_config(hpdev, where, size, val); - put_pcichild(hpdev, hv_pcidev_ref_by_slot); + put_pcichild(hpdev); return PCIBIOS_SUCCESSFUL; } @@ -856,7 +852,7 @@ static void hv_msi_free(struct irq_domain *domain, struct msi_domain_info *info, } hv_int_desc_free(hpdev, int_desc); - put_pcichild(hpdev, hv_pcidev_ref_by_slot); + put_pcichild(hpdev); } static int hv_set_affinity(struct irq_data *data, const struct cpumask *dest, @@ -1186,13 +1182,13 @@ static void hv_compose_msi_msg(struct irq_data *data, struct msi_msg *msg) msg->address_lo = comp.int_desc.address & 0xffffffff; msg->data = comp.int_desc.data; - put_pcichild(hpdev, hv_pcidev_ref_by_slot); + put_pcichild(hpdev); return; free_int_desc: kfree(int_desc); drop_reference: - put_pcichild(hpdev, hv_pcidev_ref_by_slot); + put_pcichild(hpdev); return_null_message: msg->address_hi = 0; msg->address_lo = 0; @@ -1508,19 +1504,6 @@ static void q_resource_requirements(void *context, struct pci_response *resp, complete(&completion->host_event); } -static void get_pcichild(struct hv_pci_dev *hpdev, - enum hv_pcidev_ref_reason reason) -{ - refcount_inc(&hpdev->refs); -} - -static void put_pcichild(struct hv_pci_dev *hpdev, - enum hv_pcidev_ref_reason reason) -{ - if (refcount_dec_and_test(&hpdev->refs)) - kfree(hpdev); -} - /** * new_pcichild_device() - Create a new child device * @hbus: The internal struct tracking this root PCI bus. @@ -1572,7 +1555,7 @@ static struct hv_pci_dev *new_pcichild_device(struct hv_pcibus_device *hbus, hpdev->desc = *desc; refcount_set(&hpdev->refs, 1); - get_pcichild(hpdev, hv_pcidev_ref_childlist); + get_pcichild(hpdev); spin_lock_irqsave(&hbus->device_list_lock, flags); /* @@ -1618,7 +1601,7 @@ static struct hv_pci_dev *get_pcichild_wslot(struct hv_pcibus_device *hbus, list_for_each_entry(iter, &hbus->children, list_entry) { if (iter->desc.win_slot.slot == wslot) { hpdev = iter; - get_pcichild(hpdev, hv_pcidev_ref_by_slot); + get_pcichild(hpdev); break; } } @@ -1735,7 +1718,7 @@ static void pci_devices_present_work(struct work_struct *work) list_entry); if (hpdev->reported_missing) { found = true; - put_pcichild(hpdev, hv_pcidev_ref_childlist); + put_pcichild(hpdev); list_move_tail(&hpdev->list_entry, &removed); break; } @@ -1748,7 +1731,7 @@ static void pci_devices_present_work(struct work_struct *work) hpdev = list_first_entry(&removed, struct hv_pci_dev, list_entry); list_del(&hpdev->list_entry); - put_pcichild(hpdev, hv_pcidev_ref_initial); + put_pcichild(hpdev); } switch (hbus->state) { @@ -1883,8 +1866,8 @@ static void hv_eject_device_work(struct work_struct *work) sizeof(*ejct_pkt), (unsigned long)&ctxt.pkt, VM_PKT_DATA_INBAND, 0); - put_pcichild(hpdev, hv_pcidev_ref_childlist); - put_pcichild(hpdev, hv_pcidev_ref_pnp); + put_pcichild(hpdev); + put_pcichild(hpdev); put_hvpcibus(hpdev->hbus); } @@ -1899,7 +1882,7 @@ static void hv_eject_device_work(struct work_struct *work) static void hv_pci_eject_device(struct hv_pci_dev *hpdev) { hpdev->state = hv_pcichild_ejecting; - get_pcichild(hpdev, hv_pcidev_ref_pnp); + get_pcichild(hpdev); INIT_WORK(&hpdev->wrk, hv_eject_device_work); get_hvpcibus(hpdev->hbus); queue_work(hpdev->hbus->wq, &hpdev->wrk); @@ -1999,8 +1982,7 @@ static void hv_pci_onchannelcallback(void *context) dev_message->wslot.slot); if (hpdev) { hv_pci_eject_device(hpdev); - put_pcichild(hpdev, - hv_pcidev_ref_by_slot); + put_pcichild(hpdev); } break; @@ -2398,7 +2380,7 @@ static int hv_send_resources_allocated(struct hv_device *hdev) PCI_RESOURCES_ASSIGNED2; res_assigned2->wslot.slot = hpdev->desc.win_slot.slot; } - put_pcichild(hpdev, hv_pcidev_ref_by_slot); + put_pcichild(hpdev); ret = vmbus_sendpacket(hdev->channel, &pkt->message, size_res, (unsigned long)pkt, @@ -2446,7 +2428,7 @@ static int hv_send_resources_released(struct hv_device *hdev) pkt.message_type.type = PCI_RESOURCES_RELEASED; pkt.wslot.slot = hpdev->desc.win_slot.slot; - put_pcichild(hpdev, hv_pcidev_ref_by_slot); + put_pcichild(hpdev); ret = vmbus_sendpacket(hdev->channel, &pkt, sizeof(pkt), 0, VM_PKT_DATA_INBAND, 0);