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tg3: Add code to verify RODATA checksum of VPD

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This patch adds code to verify the checksum stored in the "RV" info
keyword of the RODATA VPD section.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Matt Carlson 2011-03-09 16:58:21 +00:00 committed by David S. Miller
parent 01c3a3920f
commit d4894f3ea7
2 changed files with 36 additions and 0 deletions
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35
drivers/net/tg3.c
View File

@ -10499,6 +10499,41 @@ static int tg3_test_nvram(struct tg3 *tp)
if (csum != le32_to_cpu(buf[0xfc/4]))
goto out;
for (i = 0; i < TG3_NVM_VPD_LEN; i += 4) {
/* The data is in little-endian format in NVRAM.
* Use the big-endian read routines to preserve
* the byte order as it exists in NVRAM.
*/
if (tg3_nvram_read_be32(tp, TG3_NVM_VPD_OFF + i, &buf[i/4]))
goto out;
}
i = pci_vpd_find_tag((u8 *)buf, 0, TG3_NVM_VPD_LEN,
PCI_VPD_LRDT_RO_DATA);
if (i > 0) {
j = pci_vpd_lrdt_size(&((u8 *)buf)[i]);
if (j < 0)
goto out;
if (i + PCI_VPD_LRDT_TAG_SIZE + j > TG3_NVM_VPD_LEN)
goto out;
i += PCI_VPD_LRDT_TAG_SIZE;
j = pci_vpd_find_info_keyword((u8 *)buf, i, j,
PCI_VPD_RO_KEYWORD_CHKSUM);
if (j > 0) {
u8 csum8 = 0;
j += PCI_VPD_INFO_FLD_HDR_SIZE;
for (i = 0; i <= j; i++)
csum8 += ((u8 *)buf)[i];
if (csum8)
goto out;
}
}
err = 0;
out:

1
include/linux/pci.h
View File

@ -1479,6 +1479,7 @@ void pci_request_acs(void);
#define PCI_VPD_RO_KEYWORD_PARTNO "PN"
#define PCI_VPD_RO_KEYWORD_MFR_ID "MN"
#define PCI_VPD_RO_KEYWORD_VENDOR0 "V0"
#define PCI_VPD_RO_KEYWORD_CHKSUM "RV"
/**
* pci_vpd_lrdt_size - Extracts the Large Resource Data Type length