USB: Phidgets should check create_device_file() return value
device_create_file() could fail, add proper error paths for this condition.
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/misc/phidgetkit.c b/drivers/usb/misc/phidgetkit.c
index 3f508957..9a8d137 100644
--- a/drivers/usb/misc/phidgetkit.c
+++ b/drivers/usb/misc/phidgetkit.c
@@ -193,8 +193,11 @@
struct interfacekit *kit = dev_get_drvdata(dev); \
change_string(kit, buf, number - 1); \
return count; \
-} \
-static DEVICE_ATTR(lcd_line_##number, S_IWUGO, NULL, lcd_line_##number);
+}
+
+#define lcd_line_attr(number) \
+ __ATTR(lcd_line_##number, S_IWUGO, NULL, lcd_line_##number)
+
set_lcd_line(1);
set_lcd_line(2);
@@ -232,15 +235,22 @@
kfree(buffer);
return retval;
}
-static DEVICE_ATTR(backlight, S_IWUGO, NULL, set_backlight);
+
+static struct device_attribute dev_lcd_line_attrs[] = {
+ lcd_line_attr(1),
+ lcd_line_attr(2),
+ __ATTR(backlight, S_IWUGO, NULL, set_backlight)
+};
static void remove_lcd_files(struct interfacekit *kit)
{
+ int i;
+
if (kit->lcd_files_on) {
dev_dbg(&kit->udev->dev, "Removing lcd files\n");
- device_remove_file(kit->dev, &dev_attr_lcd_line_1);
- device_remove_file(kit->dev, &dev_attr_lcd_line_2);
- device_remove_file(kit->dev, &dev_attr_backlight);
+
+ for (i=0; i<ARRAY_SIZE(dev_lcd_line_attrs); i++)
+ device_remove_file(kit->dev, &dev_lcd_line_attrs[i]);
}
}
@@ -248,6 +258,7 @@
{
struct interfacekit *kit = dev_get_drvdata(dev);
int enable;
+ int i, rc;
if (kit->ifkit->has_lcd == 0)
return -ENODEV;
@@ -258,9 +269,12 @@
if (enable) {
if (!kit->lcd_files_on) {
dev_dbg(&kit->udev->dev, "Adding lcd files\n");
- device_create_file(kit->dev, &dev_attr_lcd_line_1);
- device_create_file(kit->dev, &dev_attr_lcd_line_2);
- device_create_file(kit->dev, &dev_attr_backlight);
+ for (i=0; i<ARRAY_SIZE(dev_lcd_line_attrs); i++) {
+ rc = device_create_file(kit->dev,
+ &dev_lcd_line_attrs[i]);
+ if (rc)
+ goto out;
+ }
kit->lcd_files_on = 1;
}
} else {
@@ -271,7 +285,13 @@
}
return count;
+out:
+ while (i-- > 0)
+ device_remove_file(kit->dev, &dev_lcd_line_attrs[i]);
+
+ return rc;
}
+
static DEVICE_ATTR(lcd, S_IWUGO, NULL, enable_lcd_files);
static void interfacekit_irq(struct urb *urb, struct pt_regs *regs)
@@ -403,9 +423,12 @@
struct interfacekit *kit = dev_get_drvdata(dev); \
\
return sprintf(buf, "%d\n", !!test_bit(value - 1, &kit->outputs));\
-} \
-static DEVICE_ATTR(output##value, S_IWUGO | S_IRUGO, \
- show_output##value, set_output##value);
+}
+
+#define output_attr(value) \
+ __ATTR(output##value, S_IWUGO | S_IRUGO, \
+ show_output##value, set_output##value)
+
show_set_output(1);
show_set_output(2);
show_set_output(3);
@@ -423,14 +446,24 @@
show_set_output(15);
show_set_output(16);
+static struct device_attribute dev_output_attrs[] = {
+ output_attr(1), output_attr(2), output_attr(3), output_attr(4),
+ output_attr(5), output_attr(6), output_attr(7), output_attr(8),
+ output_attr(9), output_attr(10), output_attr(11), output_attr(12),
+ output_attr(13), output_attr(14), output_attr(15), output_attr(16)
+};
+
#define show_input(value) \
-static ssize_t show_input##value(struct device *dev, struct device_attribute *attr, char *buf) \
+static ssize_t show_input##value(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
{ \
struct interfacekit *kit = dev_get_drvdata(dev); \
\
return sprintf(buf, "%d\n", (int)kit->inputs[value - 1]); \
-} \
-static DEVICE_ATTR(input##value, S_IRUGO, show_input##value, NULL);
+}
+
+#define input_attr(value) \
+ __ATTR(input##value, S_IRUGO, show_input##value, NULL)
show_input(1);
show_input(2);
@@ -449,6 +482,13 @@
show_input(15);
show_input(16);
+static struct device_attribute dev_input_attrs[] = {
+ input_attr(1), input_attr(2), input_attr(3), input_attr(4),
+ input_attr(5), input_attr(6), input_attr(7), input_attr(8),
+ input_attr(9), input_attr(10), input_attr(11), input_attr(12),
+ input_attr(13), input_attr(14), input_attr(15), input_attr(16)
+};
+
#define show_sensor(value) \
static ssize_t show_sensor##value(struct device *dev, \
struct device_attribute *attr, \
@@ -457,8 +497,10 @@
struct interfacekit *kit = dev_get_drvdata(dev); \
\
return sprintf(buf, "%d\n", (int)kit->sensors[value - 1]); \
-} \
-static DEVICE_ATTR(sensor##value, S_IRUGO, show_sensor##value, NULL);
+}
+
+#define sensor_attr(value) \
+ __ATTR(sensor##value, S_IRUGO, show_sensor##value, NULL)
show_sensor(1);
show_sensor(2);
@@ -469,6 +511,11 @@
show_sensor(7);
show_sensor(8);
+static struct device_attribute dev_sensor_attrs[] = {
+ sensor_attr(1), sensor_attr(2), sensor_attr(3), sensor_attr(4),
+ sensor_attr(5), sensor_attr(6), sensor_attr(7), sensor_attr(8)
+};
+
static int interfacekit_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
struct usb_device *dev = interface_to_usbdev(intf);
@@ -477,7 +524,7 @@
struct interfacekit *kit;
struct driver_interfacekit *ifkit;
int pipe, maxp, rc = -ENOMEM;
- int bit, value;
+ int bit, value, i;
ifkit = (struct driver_interfacekit *)id->driver_info;
if (!ifkit)
@@ -541,74 +588,49 @@
goto out;
}
- if (ifkit->outputs >= 4) {
- device_create_file(kit->dev, &dev_attr_output1);
- device_create_file(kit->dev, &dev_attr_output2);
- device_create_file(kit->dev, &dev_attr_output3);
- device_create_file(kit->dev, &dev_attr_output4);
- }
- if (ifkit->outputs >= 8) {
- device_create_file(kit->dev, &dev_attr_output5);
- device_create_file(kit->dev, &dev_attr_output6);
- device_create_file(kit->dev, &dev_attr_output7);
- device_create_file(kit->dev, &dev_attr_output8);
- }
- if (ifkit->outputs == 16) {
- device_create_file(kit->dev, &dev_attr_output9);
- device_create_file(kit->dev, &dev_attr_output10);
- device_create_file(kit->dev, &dev_attr_output11);
- device_create_file(kit->dev, &dev_attr_output12);
- device_create_file(kit->dev, &dev_attr_output13);
- device_create_file(kit->dev, &dev_attr_output14);
- device_create_file(kit->dev, &dev_attr_output15);
- device_create_file(kit->dev, &dev_attr_output16);
+ for (i=0; i<ifkit->outputs; i++ ) {
+ rc = device_create_file(kit->dev, &dev_output_attrs[i]);
+ if (rc)
+ goto out2;
}
- if (ifkit->inputs >= 4) {
- device_create_file(kit->dev, &dev_attr_input1);
- device_create_file(kit->dev, &dev_attr_input2);
- device_create_file(kit->dev, &dev_attr_input3);
- device_create_file(kit->dev, &dev_attr_input4);
- }
- if (ifkit->inputs >= 8) {
- device_create_file(kit->dev, &dev_attr_input5);
- device_create_file(kit->dev, &dev_attr_input6);
- device_create_file(kit->dev, &dev_attr_input7);
- device_create_file(kit->dev, &dev_attr_input8);
- }
- if (ifkit->inputs == 16) {
- device_create_file(kit->dev, &dev_attr_input9);
- device_create_file(kit->dev, &dev_attr_input10);
- device_create_file(kit->dev, &dev_attr_input11);
- device_create_file(kit->dev, &dev_attr_input12);
- device_create_file(kit->dev, &dev_attr_input13);
- device_create_file(kit->dev, &dev_attr_input14);
- device_create_file(kit->dev, &dev_attr_input15);
- device_create_file(kit->dev, &dev_attr_input16);
+ for (i=0; i<ifkit->inputs; i++ ) {
+ rc = device_create_file(kit->dev, &dev_input_attrs[i]);
+ if (rc)
+ goto out3;
}
- if (ifkit->sensors >= 4) {
- device_create_file(kit->dev, &dev_attr_sensor1);
- device_create_file(kit->dev, &dev_attr_sensor2);
- device_create_file(kit->dev, &dev_attr_sensor3);
- device_create_file(kit->dev, &dev_attr_sensor4);
+ for (i=0; i<ifkit->sensors; i++ ) {
+ rc = device_create_file(kit->dev, &dev_sensor_attrs[i]);
+ if (rc)
+ goto out4;
}
- if (ifkit->sensors >= 7) {
- device_create_file(kit->dev, &dev_attr_sensor5);
- device_create_file(kit->dev, &dev_attr_sensor6);
- device_create_file(kit->dev, &dev_attr_sensor7);
- }
- if (ifkit->sensors == 8)
- device_create_file(kit->dev, &dev_attr_sensor8);
- if (ifkit->has_lcd)
- device_create_file(kit->dev, &dev_attr_lcd);
+ if (ifkit->has_lcd) {
+ rc = device_create_file(kit->dev, &dev_attr_lcd);
+ if (rc)
+ goto out4;
+
+ }
dev_info(&intf->dev, "USB PhidgetInterfaceKit %d/%d/%d attached\n",
ifkit->sensors, ifkit->inputs, ifkit->outputs);
return 0;
+out4:
+ while (i-- > 0)
+ device_remove_file(kit->dev, &dev_sensor_attrs[i]);
+
+ i = ifkit->inputs;
+out3:
+ while (i-- > 0)
+ device_remove_file(kit->dev, &dev_input_attrs[i]);
+
+ i = ifkit->outputs;
+out2:
+ while (i-- > 0)
+ device_remove_file(kit->dev, &dev_output_attrs[i]);
out:
if (kit) {
if (kit->irq)
@@ -629,6 +651,7 @@
static void interfacekit_disconnect(struct usb_interface *interface)
{
struct interfacekit *kit;
+ int i;
kit = usb_get_intfdata(interface);
usb_set_intfdata(interface, NULL);
@@ -641,68 +664,19 @@
cancel_delayed_work(&kit->do_notify);
- if (kit->ifkit->outputs >= 4) {
- device_remove_file(kit->dev, &dev_attr_output1);
- device_remove_file(kit->dev, &dev_attr_output2);
- device_remove_file(kit->dev, &dev_attr_output3);
- device_remove_file(kit->dev, &dev_attr_output4);
- }
- if (kit->ifkit->outputs >= 8) {
- device_remove_file(kit->dev, &dev_attr_output5);
- device_remove_file(kit->dev, &dev_attr_output6);
- device_remove_file(kit->dev, &dev_attr_output7);
- device_remove_file(kit->dev, &dev_attr_output8);
- }
- if (kit->ifkit->outputs == 16) {
- device_remove_file(kit->dev, &dev_attr_output9);
- device_remove_file(kit->dev, &dev_attr_output10);
- device_remove_file(kit->dev, &dev_attr_output11);
- device_remove_file(kit->dev, &dev_attr_output12);
- device_remove_file(kit->dev, &dev_attr_output13);
- device_remove_file(kit->dev, &dev_attr_output14);
- device_remove_file(kit->dev, &dev_attr_output15);
- device_remove_file(kit->dev, &dev_attr_output16);
- }
+ for (i=0; i<kit->ifkit->outputs; i++)
+ device_remove_file(kit->dev, &dev_output_attrs[i]);
- if (kit->ifkit->inputs >= 4) {
- device_remove_file(kit->dev, &dev_attr_input1);
- device_remove_file(kit->dev, &dev_attr_input2);
- device_remove_file(kit->dev, &dev_attr_input3);
- device_remove_file(kit->dev, &dev_attr_input4);
- }
- if (kit->ifkit->inputs >= 8) {
- device_remove_file(kit->dev, &dev_attr_input5);
- device_remove_file(kit->dev, &dev_attr_input6);
- device_remove_file(kit->dev, &dev_attr_input7);
- device_remove_file(kit->dev, &dev_attr_input8);
- }
- if (kit->ifkit->inputs == 16) {
- device_remove_file(kit->dev, &dev_attr_input9);
- device_remove_file(kit->dev, &dev_attr_input10);
- device_remove_file(kit->dev, &dev_attr_input11);
- device_remove_file(kit->dev, &dev_attr_input12);
- device_remove_file(kit->dev, &dev_attr_input13);
- device_remove_file(kit->dev, &dev_attr_input14);
- device_remove_file(kit->dev, &dev_attr_input15);
- device_remove_file(kit->dev, &dev_attr_input16);
- }
+ for (i=0; i<kit->ifkit->inputs; i++)
+ device_remove_file(kit->dev, &dev_input_attrs[i]);
- if (kit->ifkit->sensors >= 4) {
- device_remove_file(kit->dev, &dev_attr_sensor1);
- device_remove_file(kit->dev, &dev_attr_sensor2);
- device_remove_file(kit->dev, &dev_attr_sensor3);
- device_remove_file(kit->dev, &dev_attr_sensor4);
- }
- if (kit->ifkit->sensors >= 7) {
- device_remove_file(kit->dev, &dev_attr_sensor5);
- device_remove_file(kit->dev, &dev_attr_sensor6);
- device_remove_file(kit->dev, &dev_attr_sensor7);
- }
- if (kit->ifkit->sensors == 8)
- device_remove_file(kit->dev, &dev_attr_sensor8);
+ for (i=0; i<kit->ifkit->sensors; i++)
+ device_remove_file(kit->dev, &dev_sensor_attrs[i]);
- if (kit->ifkit->has_lcd)
+ if (kit->ifkit->has_lcd) {
device_remove_file(kit->dev, &dev_attr_lcd);
+ remove_lcd_files(kit);
+ }
device_unregister(kit->dev);