From 27385085f19a9bc9b147905554e6e2509fdaceb2 Mon Sep 17 00:00:00 2001 From: Jim Cromie Date: Mon, 10 Jul 2006 04:45:36 -0700 Subject: [PATCH] [PATCH] pc8736x_gpio: fix re-modprobe errors: undo region reservation Fix module-init-func by repairing usage of platform_device_del/put in module-exit-func. IOW, it imitates Ingo's 'mishaps' patch, which fixed the module-init-func's undo handling. Also fixes lack of release_region to undo the earlier registration. Also starts to 'use a cdev' which was originally intended (its present in scx200_gpio). Code compiles and runs, exhibits a lesser error than previously. (re-register-chrdev fails) Since I had to add "include ", I went ahead and made 2 tweaks that fell into diff-context-window: - remove include everyone's doing it - copyright updates - current date is 'wrong' Signed-off-by: Jim Cromie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/char/pc8736x_gpio.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-) diff --git a/drivers/char/pc8736x_gpio.c b/drivers/char/pc8736x_gpio.c index 5b09efcf60a..bfc45e0cc60 100644 --- a/drivers/char/pc8736x_gpio.c +++ b/drivers/char/pc8736x_gpio.c @@ -3,18 +3,18 @@ National Semiconductor PC8736x GPIO driver. Allows a user space process to play with the GPIO pins. - Copyright (c) 2005 Jim Cromie + Copyright (c) 2005,2006 Jim Cromie adapted from linux/drivers/char/scx200_gpio.c Copyright (c) 2001,2002 Christer Weinigel , */ -#include #include #include #include #include #include +#include #include #include #include @@ -255,6 +255,8 @@ static void __init pc8736x_init_shadow(void) } +static struct cdev pc8736x_gpio_cdev; + static int __init pc8736x_gpio_init(void) { int rc = 0; @@ -308,7 +310,7 @@ static int __init pc8736x_gpio_init(void) rc = register_chrdev(major, DEVNAME, &pc8736x_gpio_fops); if (rc < 0) { dev_err(&pdev->dev, "register-chrdev failed: %d\n", rc); - goto undo_platform_dev_add; + goto undo_request_region; } if (!major) { major = rc; @@ -318,6 +320,8 @@ static int __init pc8736x_gpio_init(void) pc8736x_init_shadow(); return 0; +undo_request_region: + release_region(pc8736x_gpio_base, PC8736X_GPIO_RANGE); undo_platform_dev_add: platform_device_del(pdev); undo_platform_dev_alloc: @@ -328,11 +332,14 @@ undo_platform_dev_alloc: static void __exit pc8736x_gpio_cleanup(void) { - dev_dbg(&pdev->dev, " cleanup\n"); + dev_dbg(&pdev->dev, "cleanup\n"); - release_region(pc8736x_gpio_base, 16); + cdev_del(&pc8736x_gpio_cdev); + unregister_chrdev_region(MKDEV(major,0), PC8736X_GPIO_CT); + release_region(pc8736x_gpio_base, PC8736X_GPIO_RANGE); - unregister_chrdev(major, DEVNAME); + platform_device_del(pdev); + platform_device_put(pdev); } EXPORT_SYMBOL(pc8736x_access); -- 2.20.1