From da308e8da700637d6271dddda08128094691b980 Mon Sep 17 00:00:00 2001 From: Sean Young Date: Fri, 11 Aug 2006 09:28:28 +0000 Subject: [PATCH] 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 Signed-off-by: Greg Kroah-Hartman --- drivers/usb/misc/phidgetkit.c | 238 +++++++++++-------------- drivers/usb/misc/phidgetmotorcontrol.c | 83 +++++---- drivers/usb/misc/phidgetservo.c | 74 +++++--- 3 files changed, 199 insertions(+), 196 deletions(-) diff --git a/drivers/usb/misc/phidgetkit.c b/drivers/usb/misc/phidgetkit.c index 3f508957def915..9a8d137d39f91d 100644 --- a/drivers/usb/misc/phidgetkit.c +++ b/drivers/usb/misc/phidgetkit.c @@ -193,8 +193,11 @@ static ssize_t lcd_line_##number(struct device *dev, \ 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 @@ static ssize_t set_backlight(struct device *dev, struct device_attribute *attr, 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; idev, &dev_lcd_line_attrs[i]); } } @@ -248,6 +258,7 @@ static ssize_t enable_lcd_files(struct device *dev, struct device_attribute *att { struct interfacekit *kit = dev_get_drvdata(dev); int enable; + int i, rc; if (kit->ifkit->has_lcd == 0) return -ENODEV; @@ -258,9 +269,12 @@ static ssize_t enable_lcd_files(struct device *dev, struct device_attribute *att 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; idev, + &dev_lcd_line_attrs[i]); + if (rc) + goto out; + } kit->lcd_files_on = 1; } } else { @@ -271,7 +285,13 @@ static ssize_t enable_lcd_files(struct device *dev, struct device_attribute *att } 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 @@ static ssize_t show_output##value(struct device *dev, \ 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(14); 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(14); 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 @@ static ssize_t show_sensor##value(struct device *dev, \ 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(6); 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 @@ static int interfacekit_probe(struct usb_interface *intf, const struct usb_devic 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 @@ static int interfacekit_probe(struct usb_interface *intf, const struct usb_devic 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; ioutputs; 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; iinputs; 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); - } - 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); + for (i=0; isensors; i++ ) { + rc = device_create_file(kit->dev, &dev_sensor_attrs[i]); + if (rc) + goto out4; } - 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 int interfacekit_probe(struct usb_interface *intf, const struct usb_devic 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 @@ static void interfacekit_disconnect(struct usb_interface *interface) 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; iifkit->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; iifkit->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; iifkit->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); diff --git a/drivers/usb/misc/phidgetmotorcontrol.c b/drivers/usb/misc/phidgetmotorcontrol.c index d9ac7f97f8c898..6b59b620d616b9 100644 --- a/drivers/usb/misc/phidgetmotorcontrol.c +++ b/drivers/usb/misc/phidgetmotorcontrol.c @@ -215,9 +215,12 @@ static ssize_t show_speed##value(struct device *dev, \ struct motorcontrol *mc = dev_get_drvdata(dev); \ \ return sprintf(buf, "%d\n", mc->speed[value]); \ -} \ -static DEVICE_ATTR(speed##value, S_IWUGO | S_IRUGO, \ - show_speed##value, set_speed##value); +} + +#define speed_attr(value) \ + __ATTR(speed##value, S_IWUGO | S_IRUGO, \ + show_speed##value, set_speed##value) + show_set_speed(0); show_set_speed(1); @@ -250,9 +253,12 @@ static ssize_t show_acceleration##value(struct device *dev, \ struct motorcontrol *mc = dev_get_drvdata(dev); \ \ return sprintf(buf, "%d\n", mc->acceleration[value]); \ -} \ -static DEVICE_ATTR(acceleration##value, S_IWUGO | S_IRUGO, \ - show_acceleration##value, set_acceleration##value); +} + +#define acceleration_attr(value) \ + __ATTR(acceleration##value, S_IWUGO | S_IRUGO, \ + show_acceleration##value, set_acceleration##value) + show_set_acceleration(0); show_set_acceleration(1); @@ -264,8 +270,10 @@ static ssize_t show_current##value(struct device *dev, \ struct motorcontrol *mc = dev_get_drvdata(dev); \ \ return sprintf(buf, "%dmA\n", (int)mc->_current[value]); \ -} \ -static DEVICE_ATTR(current##value, S_IRUGO, show_current##value, NULL); +} + +#define current_attr(value) \ + __ATTR(current##value, S_IRUGO, show_current##value, NULL) show_current(0); show_current(1); @@ -278,14 +286,29 @@ static ssize_t show_input##value(struct device *dev, \ struct motorcontrol *mc = dev_get_drvdata(dev); \ \ return sprintf(buf, "%d\n", (int)mc->inputs[value]); \ -} \ -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(0); show_input(1); show_input(2); show_input(3); +static struct device_attribute dev_attrs[] = { + input_attr(0), + input_attr(1), + input_attr(2), + input_attr(3), + speed_attr(0), + speed_attr(1), + acceleration_attr(0), + acceleration_attr(1), + current_attr(0), + current_attr(1) +}; + static int motorcontrol_probe(struct usb_interface *intf, const struct usb_device_id *id) { struct usb_device *dev = interface_to_usbdev(intf); @@ -293,7 +316,7 @@ static int motorcontrol_probe(struct usb_interface *intf, const struct usb_devic struct usb_endpoint_descriptor *endpoint; struct motorcontrol *mc; int pipe, maxp, rc = -ENOMEM; - int bit, value; + int bit, value, i; interface = intf->cur_altsetting; if (interface->desc.bNumEndpoints != 1) @@ -355,24 +378,18 @@ static int motorcontrol_probe(struct usb_interface *intf, const struct usb_devic goto out; } - device_create_file(mc->dev, &dev_attr_input0); - device_create_file(mc->dev, &dev_attr_input1); - device_create_file(mc->dev, &dev_attr_input2); - device_create_file(mc->dev, &dev_attr_input3); - - device_create_file(mc->dev, &dev_attr_speed0); - device_create_file(mc->dev, &dev_attr_speed1); - - device_create_file(mc->dev, &dev_attr_acceleration0); - device_create_file(mc->dev, &dev_attr_acceleration1); - - device_create_file(mc->dev, &dev_attr_current0); - device_create_file(mc->dev, &dev_attr_current1); + for (i=0; idev, &dev_attrs[i]); + if (rc) + goto out2; + } dev_info(&intf->dev, "USB PhidgetMotorControl attached\n"); return 0; - +out2: + while (i-- > 0) + device_remove_file(mc->dev, &dev_attrs[i]); out: if (mc) { if (mc->irq) @@ -393,6 +410,7 @@ static int motorcontrol_probe(struct usb_interface *intf, const struct usb_devic static void motorcontrol_disconnect(struct usb_interface *interface) { struct motorcontrol *mc; + int i; mc = usb_get_intfdata(interface); usb_set_intfdata(interface, NULL); @@ -405,19 +423,8 @@ static void motorcontrol_disconnect(struct usb_interface *interface) cancel_delayed_work(&mc->do_notify); - device_remove_file(mc->dev, &dev_attr_input0); - device_remove_file(mc->dev, &dev_attr_input1); - device_remove_file(mc->dev, &dev_attr_input2); - device_remove_file(mc->dev, &dev_attr_input3); - - device_remove_file(mc->dev, &dev_attr_speed0); - device_remove_file(mc->dev, &dev_attr_speed1); - - device_remove_file(mc->dev, &dev_attr_acceleration0); - device_remove_file(mc->dev, &dev_attr_acceleration1); - - device_remove_file(mc->dev, &dev_attr_current0); - device_remove_file(mc->dev, &dev_attr_current1); + for (i=0; idev, &dev_attrs[i]); device_unregister(mc->dev); diff --git a/drivers/usb/misc/phidgetservo.c b/drivers/usb/misc/phidgetservo.c index 66be9513fd6f6f..7163f05c5b2706 100644 --- a/drivers/usb/misc/phidgetservo.c +++ b/drivers/usb/misc/phidgetservo.c @@ -1,7 +1,7 @@ /* * USB PhidgetServo driver 1.0 * - * Copyright (C) 2004 Sean Young + * Copyright (C) 2004, 2006 Sean Young * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -235,86 +235,108 @@ static ssize_t show_servo##value (struct device *dev, \ \ return sprintf(buf, "%d.%02d\n", servo->degrees[value], \ servo->minutes[value]); \ -} \ -static DEVICE_ATTR(servo##value, S_IWUGO | S_IRUGO, \ - show_servo##value, set_servo##value); +} +#define servo_attr(value) \ + __ATTR(servo##value, S_IWUGO | S_IRUGO, \ + show_servo##value, set_servo##value) show_set(0); show_set(1); show_set(2); show_set(3); +static struct device_attribute dev_attrs[] = { + servo_attr(0), servo_attr(1), servo_attr(2), servo_attr(3) +}; + static int servo_probe(struct usb_interface *interface, const struct usb_device_id *id) { struct usb_device *udev = interface_to_usbdev(interface); struct phidget_servo *dev; - int bit, value; + int bit, value, rc; + int servo_count, i; dev = kzalloc(sizeof (struct phidget_servo), GFP_KERNEL); if (dev == NULL) { dev_err(&interface->dev, "%s - out of memory\n", __FUNCTION__); - return -ENOMEM; + rc = -ENOMEM; + goto out; } dev->udev = usb_get_dev(udev); dev->type = id->driver_info; + dev->dev_no = -1; usb_set_intfdata(interface, dev); do { bit = find_first_zero_bit(&device_no, sizeof(device_no)); value = test_and_set_bit(bit, &device_no); - } while(value); + } while (value); dev->dev_no = bit; dev->dev = device_create(phidget_class, &dev->udev->dev, 0, "servo%d", dev->dev_no); if (IS_ERR(dev->dev)) { - int rc = PTR_ERR(dev->dev); - clear_bit(dev->dev_no, &device_no); - kfree(dev); - return rc; + rc = PTR_ERR(dev->dev); + dev->dev = NULL; + goto out; } - device_create_file(dev->dev, &dev_attr_servo0); - if (dev->type & SERVO_COUNT_QUAD) { - device_create_file(dev->dev, &dev_attr_servo1); - device_create_file(dev->dev, &dev_attr_servo2); - device_create_file(dev->dev, &dev_attr_servo3); + servo_count = dev->type & SERVO_COUNT_QUAD ? 4 : 1; + + for (i=0; idev, &dev_attrs[i]); + if (rc) + goto out2; } dev_info(&interface->dev, "USB %d-Motor PhidgetServo v%d.0 attached\n", - dev->type & SERVO_COUNT_QUAD ? 4 : 1, - dev->type & SERVO_VERSION_30 ? 3 : 2); + servo_count, dev->type & SERVO_VERSION_30 ? 3 : 2); if (!(dev->type & SERVO_VERSION_30)) dev_info(&interface->dev, "WARNING: v2.0 not tested! Please report if it works.\n"); return 0; +out2: + while (i-- > 0) + device_remove_file(dev->dev, &dev_attrs[i]); +out: + if (dev) { + if (dev->dev) + device_unregister(dev->dev); + if (dev->dev_no >= 0) + clear_bit(dev->dev_no, &device_no); + + kfree(dev); + } + + return rc; } static void servo_disconnect(struct usb_interface *interface) { struct phidget_servo *dev; + int servo_count, i; dev = usb_get_intfdata(interface); usb_set_intfdata(interface, NULL); - device_remove_file(dev->dev, &dev_attr_servo0); - if (dev->type & SERVO_COUNT_QUAD) { - device_remove_file(dev->dev, &dev_attr_servo1); - device_remove_file(dev->dev, &dev_attr_servo2); - device_remove_file(dev->dev, &dev_attr_servo3); - } + if (!dev) + return; + + servo_count = dev->type & SERVO_COUNT_QUAD ? 4 : 1; + + for (i=0; idev, &dev_attrs[i]); device_unregister(dev->dev); usb_put_dev(dev->udev); dev_info(&interface->dev, "USB %d-Motor PhidgetServo v%d.0 detached\n", - dev->type & SERVO_COUNT_QUAD ? 4 : 1, - dev->type & SERVO_VERSION_30 ? 3 : 2); + servo_count, dev->type & SERVO_VERSION_30 ? 3 : 2); clear_bit(dev->dev_no, &device_no); kfree(dev);