[S390] monwriter buffer limit.

Make max_bufs a global (per linux guest) limit.

Signed-off-by: Melissa Howland <melissah@us.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/drivers/s390/char/monwriter.c b/drivers/s390/char/monwriter.c
index 1e3939aeb8ab73ececacb62ad621d23868ddd9b4..4362ff2602446f67c3209eeb92e267f7bd5b62c4 100644 (file)
--- a/drivers/s390/char/monwriter.c
+++ b/drivers/s390/char/monwriter.c
@@ -26,6 +26,7 @@
 #define MONWRITE_MAX_DATALEN   4024
 
 static int mon_max_bufs = 255;
+static int mon_buf_count;
 
 struct mon_buf {
        struct list_head list;
@@ -40,7 +41,6 @@ struct mon_private {
        size_t hdr_to_read;
        size_t data_to_read;
        struct mon_buf *current_buf;
-       int mon_buf_count;
 };
 
 /*
@@ -99,13 +99,13 @@ static int monwrite_new_hdr(struct mon_private *monpriv)
                        rc = monwrite_diag(monhdr, monbuf->data,
                                           APPLDATA_STOP_REC);
                        list_del(&monbuf->list);
-                       monpriv->mon_buf_count--;
+                       mon_buf_count--;
                        kfree(monbuf->data);
                        kfree(monbuf);
                        monbuf = NULL;
                }
        } else {
-               if (monpriv->mon_buf_count >= mon_max_bufs)
+               if (mon_buf_count >= mon_max_bufs)
                        return -ENOSPC;
                monbuf = kzalloc(sizeof(struct mon_buf), GFP_KERNEL);
                if (!monbuf)
@@ -118,7 +118,7 @@ static int monwrite_new_hdr(struct mon_private *monpriv)
                }
                monbuf->hdr = *monhdr;
                list_add_tail(&monbuf->list, &monpriv->list);
-               monpriv->mon_buf_count++;
+               mon_buf_count++;
        }
        monpriv->current_buf = monbuf;
        return 0;
@@ -186,7 +186,7 @@ static int monwrite_close(struct inode *inode, struct file *filp)
                if (entry->hdr.mon_function != MONWRITE_GEN_EVENT)
                        monwrite_diag(&entry->hdr, entry->data,
                                      APPLDATA_STOP_REC);
-               monpriv->mon_buf_count--;
+               mon_buf_count--;
                list_del(&entry->list);
                kfree(entry->data);
                kfree(entry);