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PM: hibernate: return -ENODATA if the snapshot image is not loaded

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snapshot_image_loaded() is used in both the in-kernel and the
userspace restore path to ensure that the snapshot image has been
completely loaded. However the latter path returns -EPERM in such
situations, which is meant for cases where the operation is neither
write-only nor ready.

This patch updates the check so the returned error code is -ENODATA in
both cases.

Suggested-by: Brian Geffon <bgeffon@google.com>
Signed-off-by: Alberto Garcia <berto@igalia.com>
Acked-by: Brian Geffon <bgeffon@google.com>
Link: https://patch.msgid.link/8cfda38659c623f5392f3458cb32504ffd556a74.1773075892.git.berto@igalia.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Alberto Garcia 2026-03-09 18:39:42 +01:00 committed by Rafael J. Wysocki
parent 9b0f1cd58f
commit 2b27ea5b64
1 changed files with 5 additions and 2 deletions
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7
kernel/power/user.c
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@ -322,11 +322,14 @@ static long snapshot_ioctl(struct file *filp, unsigned int cmd,
error = snapshot_write_finalize(&data->handle);
if (error)
break;
if (data->mode != O_WRONLY || !data->frozen ||
!snapshot_image_loaded(&data->handle)) {
if (data->mode != O_WRONLY || !data->frozen) {
error = -EPERM;
break;
}
if (!snapshot_image_loaded(&data->handle)) {
error = -ENODATA;
break;
}
error = hibernation_restore(data->platform_support);
break;