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Fix checksum calculation.

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Submitted by:	 Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Matthew N. Dodd 2004-08-31 21:45:30 +00:00
parent 389bdd096c
commit 320be82c0f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=134581
1 changed files with 7 additions and 12 deletions
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19
sys/i386/bios/vpd.c
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@ -153,11 +153,8 @@ vpd_probe (device_t dev)
goto bad;
}
if (vpd_cksum(RES2VPD(res))) {
device_printf(dev, "VPD checksum failed.\n");
error = ENXIO;
goto bad;
}
if (vpd_cksum(RES2VPD(res)))
device_printf(dev, "VPD checksum failed. BIOS update may be required.\n");
bad:
if (res)
@ -281,6 +278,10 @@ static driver_t vpd_driver = {
DRIVER_MODULE(vpd, nexus, vpd_driver, vpd_devclass, vpd_modevent, 0);
MODULE_VERSION(vpd, 1);
/*
* Perform a checksum over the VPD structure, starting with
* the BuildID. (Jean Delvare <khali@linux-fr.org>)
*/
static int
vpd_cksum (struct vpd *v)
{
@ -290,13 +291,7 @@ vpd_cksum (struct vpd *v)
ptr = (u_int8_t *)v;
cksum = 0;
for (i = 0; i < v->Length ; i++) {
for (i = offsetof(struct vpd, BuildID); i < v->Length ; i++)
cksum += ptr[i];
}
/* XXX: For some reason this isn't right. */
printf("VPD cksum: 0x%02x\n", cksum);
cksum = 0;
return (cksum);
}