[PATCH] i2c: Race fix for i2c-mpc.c

i2c: Race fix for i2c-mpc.c The problem was that the clock speed and driver data is initialized after the i2c adapter was added. This caused the i2c bus to start working at a wrong speed. (Mostly noticable on the second bus on mpc5200) With this patch we've tried to keep the i2c adapter working perfectly all the time it is included in the system. Initialize before added, Remove garbage after deleleted. Submitted-by: Asier Llano Palacios Signed-off-by: Sylvain Munaut <[email protected]> Signed-off-by: Kumar Gala <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
cbmeeks · Jun 22, 2005 · 7f02d56 · 7f02d56
1 parent d68a861
commit 7f02d56
Showing 1 changed file with 8 additions and 6 deletions.
diff --git a/drivers/i2c/busses/i2c-mpc.c b/drivers/i2c/busses/i2c-mpc.c
@@ -333,6 +333,9 @@ static int __devinit mpc_i2c_probe(struct ocp_device *ocp)
 	} else
 		i2c->irq = 0;
 
+	mpc_i2c_setclock(i2c);
+	ocp_set_drvdata(ocp, i2c);
+
 	i2c->adap = mpc_ops;
 	i2c_set_adapdata(&i2c->adap, i2c);
 
@@ -341,8 +344,6 @@ static int __devinit mpc_i2c_probe(struct ocp_device *ocp)
 		goto fail_add;
 	}
 
-	mpc_i2c_setclock(i2c);
-	ocp_set_drvdata(ocp, i2c);
 	return result;
 
       fail_add:
@@ -358,8 +359,8 @@ static int __devinit mpc_i2c_probe(struct ocp_device *ocp)
 static void __devexit mpc_i2c_remove(struct ocp_device *ocp)
 {
 	struct mpc_i2c *i2c = ocp_get_drvdata(ocp);
-	ocp_set_drvdata(ocp, NULL);
 	i2c_del_adapter(&i2c->adap);
+	ocp_set_drvdata(ocp, NULL);
 
 	if (ocp->def->irq != OCP_IRQ_NA)
 		free_irq(i2c->irq, i2c);
@@ -430,6 +431,9 @@ static int fsl_i2c_probe(struct device *device)
 			goto fail_irq;
 		}
 
+	mpc_i2c_setclock(i2c);
+	dev_set_drvdata(device, i2c);
+
 	i2c->adap = mpc_ops;
 	i2c_set_adapdata(&i2c->adap, i2c);
 	i2c->adap.dev.parent = &pdev->dev;
@@ -438,8 +442,6 @@ static int fsl_i2c_probe(struct device *device)
 		goto fail_add;
 	}
 
-	mpc_i2c_setclock(i2c);
-	dev_set_drvdata(device, i2c);
 	return result;
 
       fail_add:
@@ -456,8 +458,8 @@ static int fsl_i2c_remove(struct device *device)
 {
 	struct mpc_i2c *i2c = dev_get_drvdata(device);
 
-	dev_set_drvdata(device, NULL);
 	i2c_del_adapter(&i2c->adap);
+	dev_set_drvdata(device, NULL);
 
 	if (i2c->irq != 0)
 		free_irq(i2c->irq, i2c);