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[ISAPNP] Correctly calculate checksum

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See appendix B.2 of "Plug and Play ISA Specification 1.0a"
This commit is contained in:
Hervé Poussineau 2020-02-07 23:48:22 +01:00
parent 645c77335c
commit 40b2f65f0c
1 changed files with 5 additions and 5 deletions
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10
drivers/bus/isapnp/hardware.c
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@ -178,10 +178,10 @@ HwDelay(VOID)
static
inline
USHORT
NextLFSR(USHORT Lfsr, USHORT InputBit)
UCHAR
NextLFSR(UCHAR Lfsr, UCHAR InputBit)
{
ULONG NextLfsr = Lfsr >> 1;
UCHAR NextLfsr = Lfsr >> 1;
NextLfsr |= (((Lfsr ^ NextLfsr) ^ InputBit)) << 7;
@ -192,7 +192,7 @@ static
VOID
SendKey(VOID)
{
USHORT i, Lfsr;
UCHAR i, Lfsr;
HwDelay();
WriteAddress(0x00);
@ -241,7 +241,7 @@ static
USHORT
IsaPnpChecksum(PISAPNP_IDENTIFIER Identifier)
{
USHORT i,j, Lfsr, Byte;
UCHAR i, j, Lfsr, Byte;
Lfsr = ISAPNP_LFSR_SEED;
for (i = 0; i < 8; i++)