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Message-ID: <20080425175608.GA11184@c2.user-mode-linux.org>
Date: Fri, 25 Apr 2008 13:56:09 -0400
From: Jeff Dike <jdike@...toit.com>
To: Andrew Morton <akpm@...l.org>, LKML <linux-kernel@...r.kernel.org>,
uml-devel <user-mode-linux-devel@...ts.sourceforge.net>
Subject: [PATCH 5/19] UML - random driver style fixes
Give random.c a style workover while I'm changing it.
Signed-off-by: Jeff Dike <jdike@...ux.intel.com>
---
arch/um/drivers/random.c | 77 ++++++++++++++++++++++++-----------------------
1 file changed, 40 insertions(+), 37 deletions(-)
Index: linux-2.6-git/arch/um/drivers/random.c
===================================================================
--- linux-2.6-git.orig/arch/um/drivers/random.c 2008-02-06 12:20:23.000000000 -0500
+++ linux-2.6-git/arch/um/drivers/random.c 2008-02-06 12:24:05.000000000 -0500
@@ -1,4 +1,5 @@
-/* Copyright (C) 2005 Jeff Dike <jdike@...toit.com> */
+/* Copyright (C) 2005 - 2008 Jeff Dike <jdike@...nux.intel,addtoit}.com> */
+
/* Much of this ripped from drivers/char/hw_random.c, see there for other
* copyright.
*
@@ -35,7 +36,7 @@ static int rng_dev_open (struct inode *i
/* enforce read-only access to this chrdev */
if ((filp->f_mode & FMODE_READ) == 0)
return -EINVAL;
- if (filp->f_mode & FMODE_WRITE)
+ if ((filp->f_mode & FMODE_WRITE) != 0)
return -EINVAL;
return 0;
@@ -44,31 +45,31 @@ static int rng_dev_open (struct inode *i
static atomic_t host_sleep_count = ATOMIC_INIT(0);
static ssize_t rng_dev_read (struct file *filp, char __user *buf, size_t size,
- loff_t * offp)
+ loff_t *offp)
{
- u32 data;
- int n, ret = 0, have_data;
+ u32 data;
+ int n, ret = 0, have_data;
- while(size){
- n = os_read_file(random_fd, &data, sizeof(data));
- if(n > 0){
- have_data = n;
- while (have_data && size) {
- if (put_user((u8)data, buf++)) {
- ret = ret ? : -EFAULT;
- break;
- }
- size--;
- ret++;
- have_data--;
- data>>=8;
- }
- }
- else if(n == -EAGAIN){
+ while (size) {
+ n = os_read_file(random_fd, &data, sizeof(data));
+ if (n > 0) {
+ have_data = n;
+ while (have_data && size) {
+ if (put_user((u8) data, buf++)) {
+ ret = ret ? : -EFAULT;
+ break;
+ }
+ size--;
+ ret++;
+ have_data--;
+ data >>= 8;
+ }
+ }
+ else if (n == -EAGAIN) {
DECLARE_WAITQUEUE(wait, current);
- if (filp->f_flags & O_NONBLOCK)
- return ret ? : -EAGAIN;
+ if (filp->f_flags & O_NONBLOCK)
+ return ret ? : -EAGAIN;
atomic_inc(&host_sleep_count);
reactivate_fd(random_fd, RANDOM_IRQ);
@@ -85,8 +86,10 @@ static ssize_t rng_dev_read (struct file
ignore_sigio_fd(random_fd);
deactivate_fd(random_fd, RANDOM_IRQ);
}
- }
- else return n;
+ }
+ else
+ return n;
+
if (signal_pending (current))
return ret ? : -ERESTARTSYS;
}
@@ -120,33 +123,33 @@ static int __init rng_init (void)
{
int err;
- err = os_open_file("/dev/random", of_read(OPENFLAGS()), 0);
- if(err < 0)
- goto out;
+ err = os_open_file("/dev/random", of_read(OPENFLAGS()), 0);
+ if (err < 0)
+ goto out;
- random_fd = err;
+ random_fd = err;
err = um_request_irq(RANDOM_IRQ, random_fd, IRQ_READ, random_interrupt,
IRQF_DISABLED | IRQF_SAMPLE_RANDOM, "random",
NULL);
- if(err)
+ if (err)
goto err_out_cleanup_hw;
sigio_broken(random_fd, 1);
err = misc_register (&rng_miscdev);
if (err) {
- printk (KERN_ERR RNG_MODULE_NAME ": misc device register failed\n");
+ printk (KERN_ERR RNG_MODULE_NAME ": misc device register "
+ "failed\n");
goto err_out_cleanup_hw;
}
+out:
+ return err;
- out:
- return err;
-
- err_out_cleanup_hw:
+err_out_cleanup_hw:
os_close_file(random_fd);
- random_fd = -1;
- goto out;
+ random_fd = -1;
+ goto out;
}
/*
--
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