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[PATCH] swsusp: Do not fail if resume device is not set

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In the kernels later than 2.6.19 there is a regression that makes swsusp
fail if the resume device is not explicitly specified.

It can be fixed by adding an additional parameter to
mm/swapfile.c:swap_type_of() allowing us to pass the (struct block_device
*) corresponding to the first available swap back to the caller.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Rafael J. Wysocki
2007-01-05 16:36:28 -08:00
committed by Linus Torvalds
parent 3223ea8cca
commit 7bf2368742
4 changed files with 17 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
kernel/power/swap.c
View File

@@ -165,14 +165,15 @@ static int swsusp_swap_check(void) /* This is called before saving image */
{
int res;
res = swap_type_of(swsusp_resume_device, swsusp_resume_block);
res = swap_type_of(swsusp_resume_device, swsusp_resume_block,
&resume_bdev);
if (res < 0)
return res;
root_swap = res;
resume_bdev = open_by_devnum(swsusp_resume_device, FMODE_WRITE);
if (IS_ERR(resume_bdev))
return PTR_ERR(resume_bdev);
res = blkdev_get(resume_bdev, FMODE_WRITE, O_RDWR);
if (res)
return res;
res = set_blocksize(resume_bdev, PAGE_SIZE);
if (res < 0)

7
kernel/power/user.c
View File

@@ -57,7 +57,7 @@ static int snapshot_open(struct inode *inode, struct file *filp)
memset(&data->handle, 0, sizeof(struct snapshot_handle));
if ((filp->f_flags & O_ACCMODE) == O_RDONLY) {
data->swap = swsusp_resume_device ?
swap_type_of(swsusp_resume_device, 0) : -1;
swap_type_of(swsusp_resume_device, 0, NULL) : -1;
data->mode = O_RDONLY;
} else {
data->swap = -1;
@@ -268,7 +268,8 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp,
* so we need to recode them
*/
if (old_decode_dev(arg)) {
data->swap = swap_type_of(old_decode_dev(arg), 0);
data->swap = swap_type_of(old_decode_dev(arg),
0, NULL);
if (data->swap < 0)
error = -ENODEV;
} else {
@@ -365,7 +366,7 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp,
swdev = old_decode_dev(swap_area.dev);
if (swdev) {
offset = swap_area.offset;
data->swap = swap_type_of(swdev, offset);
data->swap = swap_type_of(swdev, offset, NULL);
if (data->swap < 0)
error = -ENODEV;
} else {