[XenPPC] [xenppc-unstable] [POWERPC][XEN] add ofd_strstr() that checks all strings from an OF property

[Xen patchbot-xenppc-unstable <patchbot-xenppc-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Jimi Xenidis <jimix@xxxxxxxxxxxxxx>
# Node ID a1beb7b142226b2d00af68806e02cba6100e6aa3
# Parent  164572d15e60079b8fe93b0f675312f5553c7163
[POWERPC][XEN] add ofd_strstr() that checks all strings from an OF property

Some OF properties can have a list of '\0' terminated strings, we
frequently need to strstr against all of them.

Signed-off-by: Jimi Xenidis <jimix@xxxxxxxxxxxxxx>
---
 xen/arch/powerpc/dart.c       |   17 +++++++++--------
 xen/arch/powerpc/of-devtree.h |   16 ++++++++++++++++
 2 files changed, 25 insertions(+), 8 deletions(-)

diff -r 164572d15e60 -r a1beb7b14222 xen/arch/powerpc/dart.c
--- a/xen/arch/powerpc/dart.c   Thu Sep 14 10:20:16 2006 -0400
+++ b/xen/arch/powerpc/dart.c   Thu Sep 14 11:11:00 2006 -0400
@@ -207,16 +207,17 @@ static int find_dart(struct dart_info *d
     if (rc <= 0)
         return -1;
 
+    if (ofd_strstr(compat, rc, "u4"))
+        di->di_model = DART_U4;
+    else if (ofd_strstr(compat, rc, "u3"))
+        di->di_model = DART_U3;
+    else {
+        DBG("%s: not a U3 or U4\n", __func__);
+        return -1;
+    }
+        
     di->di_base = DART_DEF_BASE;
 
-    if (strstr(compat, "u3")) {
-        di->di_model = DART_U3;
-    } else if (strstr(compat, "u4")) {
-        di->di_model = DART_U4;
-    } else {
-        DBG("%s: not a U3 or U4\n", __func__);
-        return -1;
-    }
     /* FIXME: this should actually be the HT reg value */
     di->di_window.dw_liobn = 0;
     di->di_window.dw_base_hi = 0;
diff -r 164572d15e60 -r a1beb7b14222 xen/arch/powerpc/of-devtree.h
--- a/xen/arch/powerpc/of-devtree.h     Thu Sep 14 10:20:16 2006 -0400
+++ b/xen/arch/powerpc/of-devtree.h     Thu Sep 14 11:11:00 2006 -0400
@@ -136,4 +136,20 @@ extern ofdn_t ofd_node_find_prev(void *m
 extern ofdn_t ofd_node_find_prev(void *mem, ofdn_t n);
 extern void ofd_init(int (*write)(const char *, size_t len));
 
+static inline int ofd_strstr(const char *s, int len, const char *str)
+{
+    int l = strlen(str);
+    do {
+        int n;
+
+        if (len >= l && strstr(s, str))
+            return 1;
+
+        n = strnlen(s, len) + 1;
+        len -= strnlen(s, len) + 1;
+        s += n;
+    } while (len > 0);
+    return 0;
+}
+
 #endif /* _OF_DEVTREE_H */

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