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PCI/VPD: Add pci_vpd_find_id_string()

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Add a pci_vpd_find_id_string() API function to retrieve the ID string from
VPD.

This way callers don't need pci_vpd_lrdt_size() any longer, and it can be
made private to the VPD core.

Link: https://lore.kernel.org/r/c5225bf6-8d29-970d-e271-0d7b52252630@gmail.com
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Heiner Kallweit 2021-08-26 20:55:43 +02:00 committed by Bjorn Helgaas
parent 46a347835c
commit acfbb1b8a4
2 changed files with 16 additions and 0 deletions
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6
drivers/pci/vpd.c
View File

@ -320,6 +320,12 @@ static int pci_vpd_find_tag(const u8 *buf, unsigned int len, u8 rdt, unsigned in
return -ENOENT;
}
int pci_vpd_find_id_string(const u8 *buf, unsigned int len, unsigned int *size)
{
return pci_vpd_find_tag(buf, len, PCI_VPD_LRDT_ID_STRING, size);
}
EXPORT_SYMBOL_GPL(pci_vpd_find_id_string);
static int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
unsigned int len, const char *kw)
{

10
include/linux/pci.h
View File

@ -2339,6 +2339,16 @@ static inline u8 pci_vpd_info_field_size(const u8 *info_field)
*/
void *pci_vpd_alloc(struct pci_dev *dev, unsigned int *size);
/**
* pci_vpd_find_id_string - Locate id string in VPD
* @buf: Pointer to buffered VPD data
* @len: The length of the buffer area in which to search
* @size: Pointer to field where length of id string is returned
*
* Returns the index of the id string or -ENOENT if not found.
*/
int pci_vpd_find_id_string(const u8 *buf, unsigned int len, unsigned int *size);
/**
* pci_vpd_find_ro_info_keyword - Locate info field keyword in VPD RO section
* @buf: Pointer to buffered VPD data