From 2f8a2dc2cf8012179e35c1f01a1eef45de18f1a7 Mon Sep 17 00:00:00 2001 From: Jeff Dike Date: Tue, 16 Oct 2007 01:26:43 -0700 Subject: [PATCH] uml: console tidying Tidy line.c: The includes are more minimal Lots of style fixes All the printks have severities Removed some commented-out code Deleted a useless printk when ioctl is called Fixed some whitespace damage Signed-off-by: Jeff Dike Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/um/drivers/line.c | 228 ++++++++++++++++++++--------------------- 1 file changed, 114 insertions(+), 114 deletions(-) diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c index b4538dfb48..76fe0b0da9 100644 --- a/arch/um/drivers/line.c +++ b/arch/um/drivers/line.c @@ -1,22 +1,14 @@ /* - * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com) + * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ -#include "linux/kernel.h" -#include "linux/sched.h" -#include "linux/slab.h" -#include "linux/list.h" +#include "linux/irqreturn.h" #include "linux/kd.h" -#include "linux/interrupt.h" -#include "asm/uaccess.h" #include "chan_kern.h" +#include "irq_kern.h" #include "irq_user.h" -#include "line.h" -#include "kern.h" -#include "kern_util.h" #include "os.h" -#include "irq_kern.h" #define LINE_BUFSIZE 4096 @@ -35,12 +27,13 @@ static void line_timer_cb(struct work_struct *work) { struct line *line = container_of(work, struct line, task.work); - if(!line->throttled) + if (!line->throttled) chan_interrupt(&line->chan_list, &line->task, line->tty, line->driver->read_irq); } -/* Returns the free space inside the ring buffer of this line. +/* + * Returns the free space inside the ring buffer of this line. * * Should be called while holding line->lock (this does not modify datas). */ @@ -107,11 +100,12 @@ static int buffer_data(struct line *line, const char *buf, int len) { int end, room; - if(line->buffer == NULL){ + if (line->buffer == NULL) { line->buffer = kmalloc(LINE_BUFSIZE, GFP_ATOMIC); if (line->buffer == NULL) { - printk("buffer_data - atomic allocation failed\n"); - return(0); + printk(KERN_ERR "buffer_data - atomic allocation " + "failed\n"); + return 0; } line->head = line->buffer; line->tail = line->buffer; @@ -122,7 +116,7 @@ static int buffer_data(struct line *line, const char *buf, int len) end = line->buffer + LINE_BUFSIZE - line->tail; - if (len < end){ + if (len < end) { memcpy(line->tail, buf, len); line->tail += len; } @@ -162,8 +156,10 @@ static int flush_buffer(struct line *line) if (n < 0) return n; if (n == count) { - /* We have flushed from ->head to buffer end, now we - * must flush only from the beginning to ->tail.*/ + /* + * We have flushed from ->head to buffer end, now we + * must flush only from the beginning to ->tail. + */ line->head = line->buffer; } else { line->head += n; @@ -175,7 +171,7 @@ static int flush_buffer(struct line *line) n = write_chan(&line->chan_list, line->head, count, line->driver->write_irq); - if(n < 0) + if (n < 0) return n; line->head += n; @@ -189,19 +185,18 @@ void line_flush_buffer(struct tty_struct *tty) int err; /*XXX: copied from line_write, verify if it is correct!*/ - if(tty->stopped) + if (tty->stopped) return; spin_lock_irqsave(&line->lock, flags); err = flush_buffer(line); - /*if (err == 1) - err = 0;*/ spin_unlock_irqrestore(&line->lock, flags); - //return err; } -/* We map both ->flush_chars and ->put_char (which go in pair) onto ->flush_buffer - * and ->write. Hope it's not that bad.*/ +/* + * We map both ->flush_chars and ->put_char (which go in pair) onto + * ->flush_buffer and ->write. Hope it's not that bad. + */ void line_flush_chars(struct tty_struct *tty) { line_flush_buffer(tty); @@ -218,7 +213,7 @@ int line_write(struct tty_struct *tty, const unsigned char *buf, int len) unsigned long flags; int n, ret = 0; - if(tty->stopped) + if (tty->stopped) return 0; spin_lock_irqsave(&line->lock, flags); @@ -254,17 +249,17 @@ static const struct { } tty_ioctls[] = { /* don't print these, they flood the log ... */ { TCGETS, NULL, "TCGETS" }, - { TCSETS, NULL, "TCSETS" }, - { TCSETSW, NULL, "TCSETSW" }, - { TCFLSH, NULL, "TCFLSH" }, - { TCSBRK, NULL, "TCSBRK" }, + { TCSETS, NULL, "TCSETS" }, + { TCSETSW, NULL, "TCSETSW" }, + { TCFLSH, NULL, "TCFLSH" }, + { TCSBRK, NULL, "TCSBRK" }, /* general tty stuff */ - { TCSETSF, KERN_DEBUG, "TCSETSF" }, - { TCGETA, KERN_DEBUG, "TCGETA" }, - { TIOCMGET, KERN_DEBUG, "TIOCMGET" }, - { TCSBRKP, KERN_DEBUG, "TCSBRKP" }, - { TIOCMSET, KERN_DEBUG, "TIOCMSET" }, + { TCSETSF, KERN_DEBUG, "TCSETSF" }, + { TCGETA, KERN_DEBUG, "TCGETA" }, + { TIOCMGET, KERN_DEBUG, "TIOCMGET" }, + { TCSBRKP, KERN_DEBUG, "TCSBRKP" }, + { TIOCMSET, KERN_DEBUG, "TIOCMSET" }, /* linux-specific ones */ { TIOCLINUX, KERN_INFO, "TIOCLINUX" }, @@ -321,12 +316,7 @@ int line_ioctl(struct tty_struct *tty, struct file * file, for (i = 0; i < ARRAY_SIZE(tty_ioctls); i++) if (cmd == tty_ioctls[i].cmd) break; - if (i < ARRAY_SIZE(tty_ioctls)) { - if (NULL != tty_ioctls[i].level) - printk("%s%s: %s: ioctl %s called\n", - tty_ioctls[i].level, __FUNCTION__, - tty->name, tty_ioctls[i].name); - } else { + if (i == ARRAY_SIZE(tty_ioctls)) { printk(KERN_ERR "%s: %s: unknown ioctl: 0x%x\n", __FUNCTION__, tty->name, cmd); } @@ -352,11 +342,12 @@ void line_unthrottle(struct tty_struct *tty) chan_interrupt(&line->chan_list, &line->task, tty, line->driver->read_irq); - /* Maybe there is enough stuff pending that calling the interrupt + /* + * Maybe there is enough stuff pending that calling the interrupt * throttles us again. In this case, line->throttled will be 1 * again and we shouldn't turn the interrupt back on. */ - if(!line->throttled) + if (!line->throttled) reactivate_chan(&line->chan_list, line->driver->read_irq); } @@ -367,27 +358,30 @@ static irqreturn_t line_write_interrupt(int irq, void *data) struct tty_struct *tty = line->tty; int err; - /* Interrupts are disabled here because we registered the interrupt with - * IRQF_DISABLED (see line_setup_irq).*/ + /* + * Interrupts are disabled here because we registered the interrupt with + * IRQF_DISABLED (see line_setup_irq). + */ spin_lock(&line->lock); err = flush_buffer(line); if (err == 0) { return IRQ_NONE; - } else if(err < 0) { + } else if (err < 0) { line->head = line->buffer; line->tail = line->buffer; } spin_unlock(&line->lock); - if(tty == NULL) + if (tty == NULL) return IRQ_NONE; if (test_bit(TTY_DO_WRITE_WAKEUP, &tty->flags) && (tty->ldisc.write_wakeup != NULL)) (tty->ldisc.write_wakeup)(tty); - /* BLOCKING mode + /* + * BLOCKING mode * In blocking mode, everything sleeps on tty->write_wait. * Sleeping in the console driver would break non-blocking * writes. @@ -417,7 +411,8 @@ int line_setup_irq(int fd, int input, int output, struct line *line, void *data) return err; } -/* Normally, a driver like this can rely mostly on the tty layer +/* + * Normally, a driver like this can rely mostly on the tty layer * locking, particularly when it comes to the driver structure. * However, in this case, mconsole requests can come in "from the * side", and race with opens and closes. @@ -439,11 +434,11 @@ int line_open(struct line *lines, struct tty_struct *tty) int err = -ENODEV; spin_lock(&line->count_lock); - if(!line->valid) + if (!line->valid) goto out_unlock; err = 0; - if(tty->count > 1) + if (tty->count > 1) goto out_unlock; spin_unlock(&line->count_lock); @@ -457,7 +452,7 @@ int line_open(struct line *lines, struct tty_struct *tty) INIT_DELAYED_WORK(&line->task, line_timer_cb); - if(!line->sigio){ + if (!line->sigio) { chan_enable_winch(&line->chan_list, tty); line->sigio = 1; } @@ -478,20 +473,21 @@ void line_close(struct tty_struct *tty, struct file * filp) { struct line *line = tty->driver_data; - /* If line_open fails (and tty->driver_data is never set), + /* + * If line_open fails (and tty->driver_data is never set), * tty_open will call line_close. So just return in this case. */ - if(line == NULL) + if (line == NULL) return; /* We ignore the error anyway! */ flush_buffer(line); spin_lock(&line->count_lock); - if(!line->valid) + if (!line->valid) goto out_unlock; - if(tty->count > 1) + if (tty->count > 1) goto out_unlock; spin_unlock(&line->count_lock); @@ -499,10 +495,10 @@ void line_close(struct tty_struct *tty, struct file * filp) line->tty = NULL; tty->driver_data = NULL; - if(line->sigio){ + if (line->sigio) { unregister_winch(tty); line->sigio = 0; - } + } return; @@ -526,12 +522,12 @@ static int setup_one_line(struct line *lines, int n, char *init, int init_prio, spin_lock(&line->count_lock); - if(line->tty != NULL){ + if (line->tty != NULL) { *error_out = "Device is already open"; goto out; } - if (line->init_pri <= init_prio){ + if (line->init_pri <= init_prio) { line->init_pri = init_prio; if (!strcmp(init, "none")) line->valid = 0; @@ -546,7 +542,8 @@ out: return err; } -/* Common setup code for both startup command line and mconsole initialization. +/* + * Common setup code for both startup command line and mconsole initialization. * @lines contains the array (of size @num) to modify; * @init is the setup string; * @error_out is an error string in the case of failure; @@ -558,14 +555,16 @@ int line_setup(struct line *lines, unsigned int num, char *init, int i, n, err; char *end; - if(*init == '=') { - /* We said con=/ssl= instead of con#=, so we are configuring all - * consoles at once.*/ + if (*init == '=') { + /* + * We said con=/ssl= instead of con#=, so we are configuring all + * consoles at once. + */ n = -1; } else { n = simple_strtoul(init, &end, 0); - if(*end != '='){ + if (*end != '=') { *error_out = "Couldn't parse device number"; return -EINVAL; } @@ -577,16 +576,16 @@ int line_setup(struct line *lines, unsigned int num, char *init, *error_out = "Device number out of range"; return -EINVAL; } - else if (n >= 0){ + else if (n >= 0) { err = setup_one_line(lines, n, init, INIT_ONE, error_out); - if(err) + if (err) return err; } else { - for(i = 0; i < num; i++){ + for(i = 0; i < num; i++) { err = setup_one_line(lines, i, init, INIT_ALL, error_out); - if(err) + if (err) return err; } } @@ -600,18 +599,18 @@ int line_config(struct line *lines, unsigned int num, char *str, char *new; int n; - if(*str == '='){ + if (*str == '=') { *error_out = "Can't configure all devices from mconsole"; return -EINVAL; } new = kstrdup(str, GFP_KERNEL); - if(new == NULL){ + if (new == NULL) { *error_out = "Failed to allocate memory"; return -ENOMEM; } n = line_setup(lines, num, new, error_out); - if(n < 0) + if (n < 0) return n; line = &lines[n]; @@ -626,12 +625,12 @@ int line_get_config(char *name, struct line *lines, unsigned int num, char *str, int dev, n = 0; dev = simple_strtoul(name, &end, 0); - if((*end != '\0') || (end == name)){ + if ((*end != '\0') || (end == name)) { *error_out = "line_get_config failed to parse device number"; return 0; } - if((dev < 0) || (dev >= num)){ + if ((dev < 0) || (dev >= num)) { *error_out = "device number out of range"; return 0; } @@ -639,9 +638,9 @@ int line_get_config(char *name, struct line *lines, unsigned int num, char *str, line = &lines[dev]; spin_lock(&line->count_lock); - if(!line->valid) + if (!line->valid) CONFIG_CHUNK(str, size, n, "none", 1); - else if(line->tty == NULL) + else if (line->tty == NULL) CONFIG_CHUNK(str, size, n, line->init_str, 1); else n = chan_config_string(&line->chan_list, str, size, error_out); spin_unlock(&line->count_lock); @@ -652,16 +651,16 @@ int line_get_config(char *name, struct line *lines, unsigned int num, char *str, int line_id(char **str, int *start_out, int *end_out) { char *end; - int n; + int n; n = simple_strtoul(*str, &end, 0); - if((*end != '\0') || (end == *str)) - return -1; + if ((*end != '\0') || (end == *str)) + return -1; - *str = end; - *start_out = n; - *end_out = n; - return n; + *str = end; + *start_out = n; + *end_out = n; + return n; } int line_remove(struct line *lines, unsigned int num, int n, char **error_out) @@ -671,7 +670,7 @@ int line_remove(struct line *lines, unsigned int num, int n, char **error_out) sprintf(config, "%d=none", n); err = line_setup(lines, num, config, error_out); - if(err >= 0) + if (err >= 0) err = 0; return err; } @@ -697,14 +696,14 @@ struct tty_driver *register_lines(struct line_driver *line_driver, tty_set_operations(driver, ops); if (tty_register_driver(driver)) { - printk("%s: can't register %s driver\n", - __FUNCTION__,line_driver->name); + printk(KERN_ERR "register_lines : can't register %s driver\n", + line_driver->name); put_tty_driver(driver); return NULL; } - for(i = 0; i < nlines; i++){ - if(!lines[i].valid) + for(i = 0; i < nlines; i++) { + if (!lines[i].valid) tty_unregister_device(driver, i); } @@ -721,20 +720,20 @@ void lines_init(struct line *lines, int nlines, struct chan_opts *opts) char *error; int i; - for(i = 0; i < nlines; i++){ + for(i = 0; i < nlines; i++) { line = &lines[i]; INIT_LIST_HEAD(&line->chan_list); - if(line->init_str == NULL) + if (line->init_str == NULL) continue; line->init_str = kstrdup(line->init_str, GFP_KERNEL); - if(line->init_str == NULL) - printk("lines_init - kstrdup returned NULL\n"); + if (line->init_str == NULL) + printk(KERN_ERR "lines_init - kstrdup returned NULL\n"); - if(parse_chan_pair(line->init_str, line, i, opts, &error)){ - printk("parse_chan_pair failed for device %d : %s\n", - i, error); + if (parse_chan_pair(line->init_str, line, i, opts, &error)) { + printk(KERN_ERR "parse_chan_pair failed for " + "device %d : %s\n", i, error); line->valid = 0; } } @@ -772,14 +771,14 @@ static irqreturn_t winch_interrupt(int irq, void *data) int err; char c; - if(winch->fd != -1){ + if (winch->fd != -1) { err = generic_read(winch->fd, &c, NULL); - if(err < 0){ - if(err != -EAGAIN){ - printk("winch_interrupt : read failed, " - "errno = %d\n", -err); - printk("fd %d is losing SIGWINCH support\n", - winch->tty_fd); + if (err < 0) { + if (err != -EAGAIN) { + printk(KERN_ERR "winch_interrupt : " + "read failed, errno = %d\n", -err); + printk(KERN_ERR "fd %d is losing SIGWINCH " + "support\n", winch->tty_fd); free_winch(winch, 0); return IRQ_HANDLED; } @@ -794,7 +793,7 @@ static irqreturn_t winch_interrupt(int irq, void *data) kill_pgrp(tty->pgrp, SIGWINCH, 1); } out: - if(winch->fd != -1) + if (winch->fd != -1) reactivate_fd(winch->fd, WINCH_IRQ); return IRQ_HANDLED; } @@ -806,7 +805,7 @@ void register_winch_irq(int fd, int tty_fd, int pid, struct tty_struct *tty, winch = kmalloc(sizeof(*winch), GFP_KERNEL); if (winch == NULL) { - printk("register_winch_irq - kmalloc failed\n"); + printk(KERN_ERR "register_winch_irq - kmalloc failed\n"); goto cleanup; } @@ -820,7 +819,8 @@ void register_winch_irq(int fd, int tty_fd, int pid, struct tty_struct *tty, if (um_request_irq(WINCH_IRQ, fd, IRQ_READ, winch_interrupt, IRQF_DISABLED | IRQF_SHARED | IRQF_SAMPLE_RANDOM, "winch", winch) < 0) { - printk("register_winch_irq - failed to register IRQ\n"); + printk(KERN_ERR "register_winch_irq - failed to register " + "IRQ\n"); goto out_free; } @@ -846,13 +846,13 @@ static void unregister_winch(struct tty_struct *tty) spin_lock(&winch_handler_lock); - list_for_each(ele, &winch_handlers){ + list_for_each(ele, &winch_handlers) { winch = list_entry(ele, struct winch, list); - if(winch->tty == tty){ + if (winch->tty == tty) { free_winch(winch, 1); break; - } - } + } + } spin_unlock(&winch_handler_lock); } @@ -863,7 +863,7 @@ static void winch_cleanup(void) spin_lock(&winch_handler_lock); - list_for_each_safe(ele, next, &winch_handlers){ + list_for_each_safe(ele, next, &winch_handlers) { winch = list_entry(ele, struct winch, list); free_winch(winch, 1); } @@ -878,13 +878,13 @@ char *add_xterm_umid(char *base) int len; umid = get_umid(); - if(*umid == '\0') + if (*umid == '\0') return base; len = strlen(base) + strlen(" ()") + strlen(umid) + 1; title = kmalloc(len, GFP_KERNEL); - if(title == NULL){ - printk("Failed to allocate buffer for xterm title\n"); + if (title == NULL) { + printk(KERN_ERR "Failed to allocate buffer for xterm title\n"); return base; } -- 2.39.5