Revert "i2c: imx: Fix reset of I2SR_IAL flag"

This reverts commit fa4d3055. An updated
version was sent. So, revert this version and give the new version more
time for testing.
Signed-off-by: Wolfram Sang <wsa@kernel.org>

drivers/i2c/busses/i2c-imx.c

@@ -412,19 +412,6 @@ static void i2c_imx_dma_free(struct imx_i2c_struct *i2c_imx)
 	dma->chan_using = NULL;
 }
 
-static void i2c_imx_clear_irq(struct imx_i2c_struct *i2c_imx, unsigned int bits)
-{
-	unsigned int temp;
-
-	/*
-	 * i2sr_clr_opcode is the value to clear all interrupts. Here we want to
-	 * clear only <bits>, so we write ~i2sr_clr_opcode with just <bits>
-	 * toggled. This is required because i.MX needs W1C and Vybrid uses W0C.
-	 */
-	temp = ~i2c_imx->hwdata->i2sr_clr_opcode ^ bits;
-	imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2SR);
-}
-
 static int i2c_imx_bus_busy(struct imx_i2c_struct *i2c_imx, int for_busy, bool atomic)
 {
 	unsigned long orig_jiffies = jiffies;
@@ -437,7 +424,8 @@ static int i2c_imx_bus_busy(struct imx_i2c_struct *i2c_imx, int for_busy, bool a
 
 		/* check for arbitration lost */
 		if (temp & I2SR_IAL) {
-			i2c_imx_clear_irq(i2c_imx, I2SR_IAL);
+			temp &= ~I2SR_IAL;
+			imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2SR);
 			return -EAGAIN;
 		}
 
@@ -635,7 +623,9 @@ static irqreturn_t i2c_imx_isr(int irq, void *dev_id)
 	if (temp & I2SR_IIF) {
 		/* save status register */
 		i2c_imx->i2csr = temp;
-		i2c_imx_clear_irq(i2c_imx, I2SR_IIF);
+		temp &= ~I2SR_IIF;
+		temp |= (i2c_imx->hwdata->i2sr_clr_opcode & I2SR_IIF);
+		imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2SR);
 		wake_up(&i2c_imx->queue);
 		return IRQ_HANDLED;
 	}