diff options
Diffstat (limited to 'backport/compat/backport-4.8.c')
| -rw-r--r-- | backport/compat/backport-4.8.c | 196 |
1 files changed, 0 insertions, 196 deletions
diff --git a/backport/compat/backport-4.8.c b/backport/compat/backport-4.8.c deleted file mode 100644 index 11b2e7d7..00000000 --- a/backport/compat/backport-4.8.c +++ /dev/null @@ -1,196 +0,0 @@ -/* - * Copyright(c) 2017 Intel Deutschland GmbH - * - * Backport functionality introduced in Linux 4.8. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#include <linux/usb.h> -#include <linux/usb/cdc.h> -#include <linux/pci.h> - -int cdc_parse_cdc_header(struct usb_cdc_parsed_header *hdr, - struct usb_interface *intf, - u8 *buffer, int buflen) -{ - /* duplicates are ignored */ - struct usb_cdc_union_desc *union_header = NULL; - - /* duplicates are not tolerated */ - struct usb_cdc_header_desc *header = NULL; - struct usb_cdc_ether_desc *ether = NULL; - struct usb_cdc_mdlm_detail_desc *detail = NULL; - struct usb_cdc_mdlm_desc *desc = NULL; - - unsigned int elength; - int cnt = 0; - - memset(hdr, 0x00, sizeof(struct usb_cdc_parsed_header)); - hdr->phonet_magic_present = false; - while (buflen > 0) { - elength = buffer[0]; - if (!elength) { - dev_err(&intf->dev, "skipping garbage byte\n"); - elength = 1; - goto next_desc; - } - if (buffer[1] != USB_DT_CS_INTERFACE) { - dev_err(&intf->dev, "skipping garbage\n"); - goto next_desc; - } - - switch (buffer[2]) { - case USB_CDC_UNION_TYPE: /* we've found it */ - if (elength < sizeof(struct usb_cdc_union_desc)) - goto next_desc; - if (union_header) { - dev_err(&intf->dev, "More than one union descriptor, skipping ...\n"); - goto next_desc; - } - union_header = (struct usb_cdc_union_desc *)buffer; - break; - case USB_CDC_COUNTRY_TYPE: - if (elength < sizeof(struct usb_cdc_country_functional_desc)) - goto next_desc; - hdr->usb_cdc_country_functional_desc = - (struct usb_cdc_country_functional_desc *)buffer; - break; - case USB_CDC_HEADER_TYPE: - if (elength != sizeof(struct usb_cdc_header_desc)) - goto next_desc; - if (header) - return -EINVAL; - header = (struct usb_cdc_header_desc *)buffer; - break; - case USB_CDC_ACM_TYPE: - if (elength < sizeof(struct usb_cdc_acm_descriptor)) - goto next_desc; - hdr->usb_cdc_acm_descriptor = - (struct usb_cdc_acm_descriptor *)buffer; - break; - case USB_CDC_ETHERNET_TYPE: - if (elength != sizeof(struct usb_cdc_ether_desc)) - goto next_desc; - if (ether) - return -EINVAL; - ether = (struct usb_cdc_ether_desc *)buffer; - break; - case USB_CDC_CALL_MANAGEMENT_TYPE: - if (elength < sizeof(struct usb_cdc_call_mgmt_descriptor)) - goto next_desc; - hdr->usb_cdc_call_mgmt_descriptor = - (struct usb_cdc_call_mgmt_descriptor *)buffer; - break; - case USB_CDC_DMM_TYPE: - if (elength < sizeof(struct usb_cdc_dmm_desc)) - goto next_desc; - hdr->usb_cdc_dmm_desc = - (struct usb_cdc_dmm_desc *)buffer; - break; - case USB_CDC_MDLM_TYPE: - if (elength < sizeof(struct usb_cdc_mdlm_desc *)) - goto next_desc; - if (desc) - return -EINVAL; - desc = (struct usb_cdc_mdlm_desc *)buffer; - break; - case USB_CDC_MDLM_DETAIL_TYPE: - if (elength < sizeof(struct usb_cdc_mdlm_detail_desc *)) - goto next_desc; - if (detail) - return -EINVAL; - detail = (struct usb_cdc_mdlm_detail_desc *)buffer; - break; - case USB_CDC_NCM_TYPE: - if (elength < sizeof(struct usb_cdc_ncm_desc)) - goto next_desc; - hdr->usb_cdc_ncm_desc = (struct usb_cdc_ncm_desc *)buffer; - break; - case USB_CDC_MBIM_TYPE: - if (elength < sizeof(struct usb_cdc_mbim_desc)) - goto next_desc; - - hdr->usb_cdc_mbim_desc = (struct usb_cdc_mbim_desc *)buffer; - break; - case USB_CDC_MBIM_EXTENDED_TYPE: - if (elength < sizeof(struct usb_cdc_mbim_extended_desc)) - break; - hdr->usb_cdc_mbim_extended_desc = - (struct usb_cdc_mbim_extended_desc *)buffer; - break; - case CDC_PHONET_MAGIC_NUMBER: - hdr->phonet_magic_present = true; - break; - default: - /* - * there are LOTS more CDC descriptors that - * could legitimately be found here. - */ - dev_dbg(&intf->dev, "Ignoring descriptor: type %02x, length %ud\n", - buffer[2], elength); - goto next_desc; - } - cnt++; -next_desc: - buflen -= elength; - buffer += elength; - } - hdr->usb_cdc_union_desc = union_header; - hdr->usb_cdc_header_desc = header; - hdr->usb_cdc_mdlm_detail_desc = detail; - hdr->usb_cdc_mdlm_desc = desc; - hdr->usb_cdc_ether_desc = ether; - return cnt; -} -EXPORT_SYMBOL_GPL(cdc_parse_cdc_header); - -#ifdef CONFIG_PCI -#ifdef CONFIG_PCI_MSI - -/** - * pci_alloc_irq_vectors - allocate multiple IRQs for a device - * @dev: PCI device to operate on - * @min_vecs: minimum number of vectors required (must be >= 1) - * @max_vecs: maximum (desired) number of vectors - * @flags: flags or quirks for the allocation - * - * Allocate up to @max_vecs interrupt vectors for @dev, using MSI-X or MSI - * vectors if available, and fall back to a single legacy vector - * if neither is available. Return the number of vectors allocated, - * (which might be smaller than @max_vecs) if successful, or a negative - * error code on error. If less than @min_vecs interrupt vectors are - * available for @dev the function will fail with -ENOSPC. - * - * To get the Linux IRQ number used for a vector that can be passed to - * request_irq() use the pci_irq_vector() helper. - */ -int pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs, - unsigned int max_vecs, unsigned int flags) -{ - int vecs = -ENOSPC; - - if (flags & PCI_IRQ_MSIX) { - vecs = pci_enable_msix_range(dev, NULL, min_vecs, max_vecs); - if (vecs > 0) - return vecs; - } - - if (flags & PCI_IRQ_MSI) { - vecs = pci_enable_msi_range(dev, min_vecs, max_vecs); - if (vecs > 0) - return vecs; - } - - /* use legacy irq if allowed */ - if ((flags & PCI_IRQ_LEGACY) && min_vecs == 1) { - pci_intx(dev, 1); - return 1; - } - - return vecs; -} -EXPORT_SYMBOL_GPL(pci_alloc_irq_vectors); -#endif /* CONFIG_PCI_MSI */ -#endif /* CONFIG_PCI */ |