Merge branch 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6

* 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6:
  i2c-algo-pca: Let PCA9564 recover from unacked data byte (state 0x30)
  i2c-algo-bit: Fix timeout test
  i2c: Timeouts off by 1

11 files changed, 25 insertions, 14 deletions

diff --git a/drivers/i2c/algos/i2c-algo-bit.c b/drivers/i2c/algos/i2c-algo-bit.c
index d420cc5f563..e25e13980af 100644
--- a/drivers/i2c/algos/i2c-algo-bit.c
+++ b/drivers/i2c/algos/i2c-algo-bit.c
@@ -104,7 +104,7 @@ static int sclhi(struct i2c_algo_bit_data *adap)
 		 * chips may hold it low ("clock stretching") while they
 		 * are processing data internally.
 		 */
-		if (time_after_eq(jiffies, start + adap->timeout))
+		if (time_after(jiffies, start + adap->timeout))
 			return -ETIMEDOUT;
 		cond_resched();
 	}
diff --git a/drivers/i2c/algos/i2c-algo-pca.c b/drivers/i2c/algos/i2c-algo-pca.c
index 6318f7ddc1d..78d42aae008 100644
--- a/drivers/i2c/algos/i2c-algo-pca.c
+++ b/drivers/i2c/algos/i2c-algo-pca.c
@@ -287,10 +287,21 @@ static int pca_xfer(struct i2c_adapter *i2c_adap,
 
 		case 0x30: /* Data byte in I2CDAT has been transmitted; NOT ACK has been received */
 			DEB2("NOT ACK received after data byte\n");
+			pca_stop(adap);
 			goto out;
 
 		case 0x38: /* Arbitration lost during SLA+W, SLA+R or data bytes */
 			DEB2("Arbitration lost\n");
+			/*
+			 * The PCA9564 data sheet (2006-09-01) says "A
+			 * START condition will be transmitted when the
+			 * bus becomes free (STOP or SCL and SDA high)"
+			 * when the STA bit is set (p. 11).
+			 *
+			 * In case this won't work, try pca_reset()
+			 * instead.
+			 */
+			pca_start(adap);
 			goto out;
 
 		case 0x58: /* Data byte has been received; NOT ACK has been returned */
diff --git a/drivers/i2c/busses/i2c-ali1535.c b/drivers/i2c/busses/i2c-ali1535.c
index 981e080b32a..d108450df06 100644
--- a/drivers/i2c/busses/i2c-ali1535.c
+++ b/drivers/i2c/busses/i2c-ali1535.c
@@ -284,7 +284,7 @@ static int ali1535_transaction(struct i2c_adapter *adap)
 		 && (timeout++ < MAX_TIMEOUT));
 
 	/* If the SMBus is still busy, we give up */
-	if (timeout >= MAX_TIMEOUT) {
+	if (timeout > MAX_TIMEOUT) {
 		result = -ETIMEDOUT;
 		dev_err(&adap->dev, "SMBus Timeout!\n");
 	}
diff --git a/drivers/i2c/busses/i2c-ali15x3.c b/drivers/i2c/busses/i2c-ali15x3.c
index 39066dee46e..d627fceb790 100644
--- a/drivers/i2c/busses/i2c-ali15x3.c
+++ b/drivers/i2c/busses/i2c-ali15x3.c
@@ -306,7 +306,7 @@ static int ali15x3_transaction(struct i2c_adapter *adap)
 		 && (timeout++ < MAX_TIMEOUT));
 
 	/* If the SMBus is still busy, we give up */
-	if (timeout >= MAX_TIMEOUT) {
+	if (timeout > MAX_TIMEOUT) {
 		result = -ETIMEDOUT;
 		dev_err(&adap->dev, "SMBus Timeout!\n");
 	}
diff --git a/drivers/i2c/busses/i2c-amd756.c b/drivers/i2c/busses/i2c-amd756.c
index 220f4a1eee1..f7d6fe9c49b 100644
--- a/drivers/i2c/busses/i2c-amd756.c
+++ b/drivers/i2c/busses/i2c-amd756.c
@@ -126,7 +126,7 @@ static int amd756_transaction(struct i2c_adapter *adap)
 		} while ((temp & (GS_HST_STS | GS_SMB_STS)) &&
 		         (timeout++ < MAX_TIMEOUT));
 		/* If the SMBus is still busy, we give up */
-		if (timeout >= MAX_TIMEOUT) {
+		if (timeout > MAX_TIMEOUT) {
 			dev_dbg(&adap->dev, "Busy wait timeout (%04x)\n", temp);
 			goto abort;
 		}
@@ -143,7 +143,7 @@ static int amd756_transaction(struct i2c_adapter *adap)
 	} while ((temp & GS_HST_STS) && (timeout++ < MAX_TIMEOUT));
 
 	/* If the SMBus is still busy, we give up */
-	if (timeout >= MAX_TIMEOUT) {
+	if (timeout > MAX_TIMEOUT) {
 		dev_dbg(&adap->dev, "Completion timeout!\n");
 		goto abort;
 	}
diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index 10411848fd7..9d2c5adf5d4 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -237,7 +237,7 @@ static int i801_transaction(int xact)
 		status = inb_p(SMBHSTSTS);
 	} while ((status & SMBHSTSTS_HOST_BUSY) && (timeout++ < MAX_TIMEOUT));
 
-	result = i801_check_post(status, timeout >= MAX_TIMEOUT);
+	result = i801_check_post(status, timeout > MAX_TIMEOUT);
 	if (result < 0)
 		return result;
 
@@ -257,9 +257,9 @@ static void i801_wait_hwpec(void)
 	} while ((!(status & SMBHSTSTS_INTR))
 		 && (timeout++ < MAX_TIMEOUT));
 
-	if (timeout >= MAX_TIMEOUT) {
+	if (timeout > MAX_TIMEOUT)
 		dev_dbg(&I801_dev->dev, "PEC Timeout!\n");
-	}
+
 	outb_p(status, SMBHSTSTS);
 }
 
@@ -344,7 +344,7 @@ static int i801_block_transaction_byte_by_byte(union i2c_smbus_data *data,
 		while ((!(status & SMBHSTSTS_BYTE_DONE))
 		       && (timeout++ < MAX_TIMEOUT));
 
-		result = i801_check_post(status, timeout >= MAX_TIMEOUT);
+		result = i801_check_post(status, timeout > MAX_TIMEOUT);
 		if (result < 0)
 			return result;
 
diff --git a/drivers/i2c/busses/i2c-isch.c b/drivers/i2c/busses/i2c-isch.c
index b9c01aa9003..9f6b8e0f863 100644
--- a/drivers/i2c/busses/i2c-isch.c
+++ b/drivers/i2c/busses/i2c-isch.c
@@ -112,7 +112,7 @@ static int sch_transaction(void)
 	} while ((temp & 0x08) && (timeout++ < MAX_TIMEOUT));
 
 	/* If the SMBus is still busy, we give up */
-	if (timeout >= MAX_TIMEOUT) {
+	if (timeout > MAX_TIMEOUT) {
 		dev_err(&sch_adapter.dev, "SMBus Timeout!\n");
 		result = -ETIMEDOUT;
 	}
diff --git a/drivers/i2c/busses/i2c-nforce2.c b/drivers/i2c/busses/i2c-nforce2.c
index 2ff4683703a..ec11d1c4e77 100644
--- a/drivers/i2c/busses/i2c-nforce2.c
+++ b/drivers/i2c/busses/i2c-nforce2.c
@@ -173,7 +173,7 @@ static int nforce2_check_status(struct i2c_adapter *adap)
 		temp = inb_p(NVIDIA_SMB_STS);
 	} while ((!temp) && (timeout++ < MAX_TIMEOUT));
 
-	if (timeout >= MAX_TIMEOUT) {
+	if (timeout > MAX_TIMEOUT) {
 		dev_dbg(&adap->dev, "SMBus Timeout!\n");
 		if (smbus->can_abort)
 			nforce2_abort(adap);
diff --git a/drivers/i2c/busses/i2c-sis5595.c b/drivers/i2c/busses/i2c-sis5595.c
index f320ab27da4..139f0c7f12a 100644
--- a/drivers/i2c/busses/i2c-sis5595.c
+++ b/drivers/i2c/busses/i2c-sis5595.c
@@ -256,7 +256,7 @@ static int sis5595_transaction(struct i2c_adapter *adap)
 	} while (!(temp & 0x40) && (timeout++ < MAX_TIMEOUT));
 
 	/* If the SMBus is still busy, we give up */
-	if (timeout >= MAX_TIMEOUT) {
+	if (timeout > MAX_TIMEOUT) {
 		dev_dbg(&adap->dev, "SMBus Timeout!\n");
 		result = -ETIMEDOUT;
 	}
diff --git a/drivers/i2c/busses/i2c-sis630.c b/drivers/i2c/busses/i2c-sis630.c
index 50c3610e602..70ca41e90e5 100644
--- a/drivers/i2c/busses/i2c-sis630.c
+++ b/drivers/i2c/busses/i2c-sis630.c
@@ -173,7 +173,7 @@ static int sis630_transaction_wait(struct i2c_adapter *adap, int size)
 	} while (!(temp & 0x0e) && (timeout++ < MAX_TIMEOUT));
 
 	/* If the SMBus is still busy, we give up */
-	if (timeout >= MAX_TIMEOUT) {
+	if (timeout > MAX_TIMEOUT) {
 		dev_dbg(&adap->dev, "SMBus Timeout!\n");
 		result = -ETIMEDOUT;
 	}
diff --git a/drivers/i2c/busses/i2c-sis96x.c b/drivers/i2c/busses/i2c-sis96x.c
index 7e1594b4057..8295885b2fd 100644
--- a/drivers/i2c/busses/i2c-sis96x.c
+++ b/drivers/i2c/busses/i2c-sis96x.c
@@ -132,7 +132,7 @@ static int sis96x_transaction(int size)
 	} while (!(temp & 0x0e) && (timeout++ < MAX_TIMEOUT));
 
 	/* If the SMBus is still busy, we give up */
-	if (timeout >= MAX_TIMEOUT) {
+	if (timeout > MAX_TIMEOUT) {
 		dev_dbg(&sis96x_adapter.dev, "SMBus Timeout! (0x%02x)\n", temp);
 		result = -ETIMEDOUT;
 	}