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[PATCH] uml ubd driver: do not store error codes as ->fd

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To simplify error handling, make sure fd is saved into ubd_dev->fd only when
we are sure it is an fd and not an error code.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Paolo 'Blaisorblade' Giarrusso 2006-10-30 22:07:11 -08:00 committed by Linus Torvalds
parent 84e945e399
commit 0bf16bffee
1 changed files with 10 additions and 7 deletions
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17
arch/um/drivers/ubd_kern.c
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@ -578,33 +578,36 @@ static int ubd_open_dev(struct ubd *ubd_dev)
struct openflags flags;
char **back_ptr;
int err, create_cow, *create_ptr;
int fd;
ubd_dev->openflags = ubd_dev->boot_openflags;
create_cow = 0;
create_ptr = (ubd_dev->cow.file != NULL) ? &create_cow : NULL;
back_ptr = ubd_dev->no_cow ? NULL : &ubd_dev->cow.file;
ubd_dev->fd = open_ubd_file(ubd_dev->file, &ubd_dev->openflags, ubd_dev->shared,
fd = open_ubd_file(ubd_dev->file, &ubd_dev->openflags, ubd_dev->shared,
back_ptr, &ubd_dev->cow.bitmap_offset,
&ubd_dev->cow.bitmap_len, &ubd_dev->cow.data_offset,
create_ptr);
if((ubd_dev->fd == -ENOENT) && create_cow){
ubd_dev->fd = create_cow_file(ubd_dev->file, ubd_dev->cow.file,
if((fd == -ENOENT) && create_cow){
fd = create_cow_file(ubd_dev->file, ubd_dev->cow.file,
ubd_dev->openflags, 1 << 9, PAGE_SIZE,
&ubd_dev->cow.bitmap_offset,
&ubd_dev->cow.bitmap_len,
&ubd_dev->cow.data_offset);
if(ubd_dev->fd >= 0){
if(fd >= 0){
printk(KERN_INFO "Creating \"%s\" as COW file for "
"\"%s\"\n", ubd_dev->file, ubd_dev->cow.file);
}
}
if(ubd_dev->fd < 0){
if(fd < 0){
printk("Failed to open '%s', errno = %d\n", ubd_dev->file,
-ubd_dev->fd);
return(ubd_dev->fd);
-fd);
return fd;
}
ubd_dev->fd = fd;
if(ubd_dev->cow.file != NULL){
err = -ENOMEM;