diff options
| author | Heiner Kallweit <hkallweit1@gmail.com> | 2021-08-26 20:55:07 +0200 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2021-08-31 16:04:05 -0500 |
| commit | 46a347835cc50b04da0996a070939ed8927d69bd (patch) | |
| tree | a5700114501dc219d5416eceb13385c4e1d49d38 /drivers/pci/vpd.c | |
| parent | 59b83b29bb5532bbff54a271e0b4f321e28b954f (diff) | |
PCI/VPD: Include post-processing in pci_vpd_find_tag()
Move pci_vpd_find_tag() post-processing from pci_vpd_find_ro_info_keyword()
to pci_vpd_find_tag(). This simplifies function pci_vpd_find_id_string()
that will be added in a subsequent patch.
Link: https://lore.kernel.org/r/fb15393f-d3b2-e140-2643-570d3abd7382@gmail.com
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/vpd.c')
| -rw-r--r-- | drivers/pci/vpd.c | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/drivers/pci/vpd.c b/drivers/pci/vpd.c index 0e7a5e8a8f17..b7bf014ccc5f 100644 --- a/drivers/pci/vpd.c +++ b/drivers/pci/vpd.c @@ -296,16 +296,25 @@ void *pci_vpd_alloc(struct pci_dev *dev, unsigned int *size) } EXPORT_SYMBOL_GPL(pci_vpd_alloc); -static int pci_vpd_find_tag(const u8 *buf, unsigned int len, u8 rdt) +static int pci_vpd_find_tag(const u8 *buf, unsigned int len, u8 rdt, unsigned int *size) { int i = 0; /* look for LRDT tags only, end tag is the only SRDT tag */ while (i + PCI_VPD_LRDT_TAG_SIZE <= len && buf[i] & PCI_VPD_LRDT) { - if (buf[i] == rdt) + unsigned int lrdt_len = pci_vpd_lrdt_size(buf + i); + u8 tag = buf[i]; + + i += PCI_VPD_LRDT_TAG_SIZE; + if (tag == rdt) { + if (i + lrdt_len > len) + lrdt_len = len - i; + if (size) + *size = lrdt_len; return i; + } - i += PCI_VPD_LRDT_TAG_SIZE + pci_vpd_lrdt_size(buf + i); + i += lrdt_len; } return -ENOENT; @@ -384,16 +393,10 @@ int pci_vpd_find_ro_info_keyword(const void *buf, unsigned int len, int ro_start, infokw_start; unsigned int ro_len, infokw_size; - ro_start = pci_vpd_find_tag(buf, len, PCI_VPD_LRDT_RO_DATA); + ro_start = pci_vpd_find_tag(buf, len, PCI_VPD_LRDT_RO_DATA, &ro_len); if (ro_start < 0) return ro_start; - ro_len = pci_vpd_lrdt_size(buf + ro_start); - ro_start += PCI_VPD_LRDT_TAG_SIZE; - - if (ro_start + ro_len > len) - ro_len = len - ro_start; - infokw_start = pci_vpd_find_info_keyword(buf, ro_start, ro_len, kw); if (infokw_start < 0) return infokw_start; |