[PATCH] s390: update fs3270 to use a struct pid

Replaces the pid_t value with a struct pid to avoid pid wrap around
problems.

Signed-off-by: Cedric Le Goater <clg@fr.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Acked-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/s390/char/fs3270.c b/drivers/s390/char/fs3270.c
index b4557fa..78f8bda 100644 (file)
--- a/drivers/s390/char/fs3270.c
+++ b/drivers/s390/char/fs3270.c
@@ -27,7 +27,7 @@ struct raw3270_fn fs3270_fn;
 
 struct fs3270 {
        struct raw3270_view view;
-       pid_t fs_pid;                   /* Pid of controlling program. */
+       struct pid *fs_pid;             /* Pid of controlling program. */
        int read_command;               /* ccw command to use for reads. */
        int write_command;              /* ccw command to use for writes. */
        int attention;                  /* Got attention. */
@@ -102,7 +102,7 @@ fs3270_restore_callback(struct raw3270_request *rq, void *data)
        fp = (struct fs3270 *) rq->view;
        if (rq->rc != 0 || rq->rescnt != 0) {
                if (fp->fs_pid)
-                       kill_proc(fp->fs_pid, SIGHUP, 1);
+                       kill_pid(fp->fs_pid, SIGHUP, 1);
        }
        fp->rdbuf_size = 0;
        raw3270_request_reset(rq);
@@ -173,7 +173,7 @@ fs3270_save_callback(struct raw3270_request *rq, void *data)
         */
        if (rq->rc != 0 || rq->rescnt == 0) {
                if (fp->fs_pid)
-                       kill_proc(fp->fs_pid, SIGHUP, 1);
+                       kill_pid(fp->fs_pid, SIGHUP, 1);
                fp->rdbuf_size = 0;
        } else
                fp->rdbuf_size = fp->rdbuf->size - rq->rescnt;
@@ -442,7 +442,7 @@ fs3270_open(struct inode *inode, struct file *filp)
                return PTR_ERR(fp);
 
        init_waitqueue_head(&fp->wait);
-       fp->fs_pid = current->pid;
+       fp->fs_pid = get_pid(task_pid(current));
        rc = raw3270_add_view(&fp->view, &fs3270_fn, minor);
        if (rc) {
                fs3270_free_view(&fp->view);
@@ -480,7 +480,8 @@ fs3270_close(struct inode *inode, struct file *filp)
        fp = filp->private_data;
        filp->private_data = NULL;
        if (fp) {
-               fp->fs_pid = 0;
+               put_pid(fp->fs_pid);
+               fp->fs_pid = NULL;
                raw3270_reset(&fp->view);
                raw3270_put_view(&fp->view);
                raw3270_del_view(&fp->view);