Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik...

[linux-2.6-omap-h63xx.git] / drivers / s390 / char / monwriter.c

diff --git a/drivers/s390/char/monwriter.c b/drivers/s390/char/monwriter.c
index abd02ed501cbe52cab031dadebf8087bf8290cf4..268598ef3efe9ada78e23881b416ce6ef933b44e 100644 (file)
--- a/drivers/s390/char/monwriter.c
+++ b/drivers/s390/char/monwriter.c
@@ -23,7 +23,7 @@
 #include <asm/appldata.h>
 #include <asm/monwriter.h>
 
-#define MONWRITE_MAX_DATALEN   4024
+#define MONWRITE_MAX_DATALEN   4010
 
 static int mon_max_bufs = 255;
 static int mon_buf_count;
@@ -67,18 +67,21 @@ static int monwrite_diag(struct monwrite_hdr *myhdr, char *buffer, int fcn)
        return -EINVAL;
 }
 
-static inline struct mon_buf *monwrite_find_hdr(struct mon_private *monpriv,
-                                               struct monwrite_hdr *monhdr)
+static struct mon_buf *monwrite_find_hdr(struct mon_private *monpriv,
+                                        struct monwrite_hdr *monhdr)
 {
        struct mon_buf *entry, *next;
 
        list_for_each_entry_safe(entry, next, &monpriv->list, list)
-               if (entry->hdr.applid == monhdr->applid &&
+               if ((entry->hdr.mon_function == monhdr->mon_function ||
+                    monhdr->mon_function == MONWRITE_STOP_INTERVAL) &&
+                   entry->hdr.applid == monhdr->applid &&
                    entry->hdr.record_num == monhdr->record_num &&
                    entry->hdr.version == monhdr->version &&
                    entry->hdr.release == monhdr->release &&
                    entry->hdr.mod_level == monhdr->mod_level)
                        return entry;
+
        return NULL;
 }
 
@@ -92,7 +95,9 @@ static int monwrite_new_hdr(struct mon_private *monpriv)
            monhdr->mon_function > MONWRITE_START_CONFIG ||
            monhdr->hdrlen != sizeof(struct monwrite_hdr))
                return -EINVAL;
-       monbuf = monwrite_find_hdr(monpriv, monhdr);
+       monbuf = NULL;
+       if (monhdr->mon_function != MONWRITE_GEN_EVENT)
+               monbuf = monwrite_find_hdr(monpriv, monhdr);
        if (monbuf) {
                if (monhdr->mon_function == MONWRITE_STOP_INTERVAL) {
                        monhdr->datalen = monbuf->hdr.datalen;
@@ -104,7 +109,7 @@ static int monwrite_new_hdr(struct mon_private *monpriv)
                        kfree(monbuf);
                        monbuf = NULL;
                }
-       } else {
+       } else if (monhdr->mon_function != MONWRITE_STOP_INTERVAL) {
                if (mon_buf_count >= mon_max_bufs)
                        return -ENOSPC;
                monbuf = kzalloc(sizeof(struct mon_buf), GFP_KERNEL);
@@ -118,7 +123,8 @@ static int monwrite_new_hdr(struct mon_private *monpriv)
                }
                monbuf->hdr = *monhdr;
                list_add_tail(&monbuf->list, &monpriv->list);
-               mon_buf_count++;
+               if (monhdr->mon_function != MONWRITE_GEN_EVENT)
+                       mon_buf_count++;
        }
        monpriv->current_buf = monbuf;
        return 0;
@@ -249,7 +255,7 @@ out_error:
        return rc;
 }
 
-static struct file_operations monwrite_fops = {
+static const struct file_operations monwrite_fops = {
        .owner   = THIS_MODULE,
        .open    = &monwrite_open,
        .release = &monwrite_close,