[PATCH] ichspi: reprogram_opcode_on_the_fly return code fix.

[Stefan Tauner]

From: Carl-Daniel Hailfinger

by carldani, found in our paste service history
---
 ichspi.c |   20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/ichspi.c b/ichspi.c
index ce9c553..fbc6ea7 100644
--- a/ichspi.c
+++ b/ichspi.c
@@ -409,13 +409,19 @@ static int reprogram_opcode_on_the_fly(uint8_t opcode, unsigned int writecnt, un
    	else // we have an invalid case
    		return SPI_INVALID_LENGTH;
    }
-	int oppos = 2;	// use original JEDEC_BE_D8 offset
-	curopcodes->opcode[oppos].opcode = opcode;
-	curopcodes->opcode[oppos].spi_type = spi_type;
-	program_opcodes(curopcodes, 0);
-	oppos = find_opcode(curopcodes, opcode);
-	msg_pdbg2("on-the-fly OPCODE (0x%02X) re-programmed, op-pos=%d\n", opcode, oppos);
-	return oppos;
+	if (spi_type <= 3) {
+		int oppos = 2;	// use original JEDEC_BE_D8 offset
+		curopcodes->opcode[oppos].opcode = opcode;
+		curopcodes->opcode[oppos].spi_type = spi_type;
+		program_opcodes(curopcodes, 0);
+		oppos = find_opcode(curopcodes, opcode);
+		msg_pdbg2("on-the-fly OPCODE (0x%02X) re-programmed, op-pos=%d\n", opcode, oppos);
+		return oppos;
+	}
+	/* This case only happens if the writecnt/readcnt combination is
+	 * impossible to achieve on ICH SPI.
+	 */
+	return SPI_INVALID_LENGTH;
 }

static int find_opcode(OPCODES *op, uint8_t opcode)