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pci: Add VPD information field helper functions

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This patch adds a preprocessor constant to describe the PCI VPD
information field header size and an inline function to extract the
size of the information field itself.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Matt Carlson 2010-02-26 14:04:42 +00:00 • committed by David S. Miller
parent b55ac1b226
commit e1d5bdabb9
3 changed files with 23 additions and 8 deletions
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11
drivers/net/bnx2.c
View file

@ -7784,14 +7784,15 @@ bnx2_read_vpd_fw_ver(struct bnx2 *bp)
goto vpd_done; goto vpd_done;
while (i < (block_end - 2)) { while (i < (block_end - 2)) {
int len = data[i + 2]; int len = pci_vpd_info_field_size(&data[i]);
if (i + 3 + len > block_end) if (i + PCI_VPD_INFO_FLD_HDR_SIZE + len > block_end)
goto vpd_done; goto vpd_done;
if (data[i] == 'M' && data[i + 1] == 'N') { if (data[i] == 'M' && data[i + 1] == 'N') {
if (len != 4 || if (len != 4 ||
memcmp(&data[i + 3], "1028", 4)) memcmp(&data[i + PCI_VPD_INFO_FLD_HDR_SIZE],
"1028", 4))
goto vpd_done; goto vpd_done;
mn_match = true; mn_match = true;
@ -7800,9 +7801,9 @@ bnx2_read_vpd_fw_ver(struct bnx2 *bp)
goto vpd_done; goto vpd_done;
v0_len = len; v0_len = len;
v0_str = &data[i + 3]; v0_str = &data[i + PCI_VPD_INFO_FLD_HDR_SIZE];
} }
i += 3 + len; i += PCI_VPD_INFO_FLD_HDR_SIZE + len;
if (mn_match && v0_str) { if (mn_match && v0_str) {
memcpy(bp->fw_version, v0_str, v0_len); memcpy(bp->fw_version, v0_str, v0_len);

7
drivers/net/tg3.c
View file

@ -12604,9 +12604,9 @@ static void __devinit tg3_read_partno(struct tg3 *tp)
while (i < (block_end - 2)) { while (i < (block_end - 2)) {
if (vpd_data[i + 0] == 'P' && if (vpd_data[i + 0] == 'P' &&
vpd_data[i + 1] == 'N') { vpd_data[i + 1] == 'N') {
int partno_len = vpd_data[i + 2]; int partno_len = pci_vpd_info_field_size(&vpd_data[i]);
i += 3; i += PCI_VPD_INFO_FLD_HDR_SIZE;
if (partno_len > TG3_BPN_SIZE || if (partno_len > TG3_BPN_SIZE ||
(partno_len + i) > TG3_NVM_VPD_LEN) (partno_len + i) > TG3_NVM_VPD_LEN)
goto out_not_found; goto out_not_found;
@ -12617,7 +12617,8 @@ static void __devinit tg3_read_partno(struct tg3 *tp)
/* Success. */ /* Success. */
return; return;
} }
i += 3 + vpd_data[i + 2]; i += PCI_VPD_INFO_FLD_HDR_SIZE +
pci_vpd_info_field_size(&vpd_data[i]);
} }
/* Part number not found. */ /* Part number not found. */

13
include/linux/pci.h
View file

@ -1373,6 +1373,8 @@ void pci_request_acs(void);
#define PCI_VPD_LRDT_TAG_SIZE 3 #define PCI_VPD_LRDT_TAG_SIZE 3
#define PCI_VPD_SRDT_TAG_SIZE 1 #define PCI_VPD_SRDT_TAG_SIZE 1
#define PCI_VPD_INFO_FLD_HDR_SIZE 3
/** /**
* pci_vpd_lrdt_size - Extracts the Large Resource Data Type length * pci_vpd_lrdt_size - Extracts the Large Resource Data Type length
* @lrdt: Pointer to the beginning of the Large Resource Data Type tag * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
@ -1395,6 +1397,17 @@ static inline u8 pci_vpd_srdt_size(const u8 *srdt)
return (*srdt) & PCI_VPD_SRDT_LEN_MASK; return (*srdt) & PCI_VPD_SRDT_LEN_MASK;
} }
/**
* pci_vpd_info_field_size - Extracts the information field length
* @lrdt: Pointer to the beginning of an information field header
*
* Returns the extracted information field length.
*/
static inline u8 pci_vpd_info_field_size(const u8 *info_field)
{
return info_field[2];
}
/** /**
* pci_vpd_find_tag - Locates the Resource Data Type tag provided * pci_vpd_find_tag - Locates the Resource Data Type tag provided
* @buf: Pointer to buffered vpd data * @buf: Pointer to buffered vpd data