kexec-tools: Refine kdump device_tree sort

The commit b02d735bf was to rearrange the device-tree entries, and
assumed that these entries are sorted in the ascending order. but
acctually when I was validating kexec and kdump, the order of
serial node still is changed. So the patch is to sort these entries
by the directory name in ascending order.

Signed-off-by: Yang Wei <Wei.Yang@windriver.com>
Signed-off-by: Chong Lu <Chong.Lu@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 84 insertions, 1 deletions

diff --git a/meta/recipes-kernel/kexec/kexec-tools.inc b/meta/recipes-kernel/kexec/kexec-tools.inc
index 50b448caed..6a690c6a7e 100644
--- a/meta/recipes-kernel/kexec/kexec-tools.inc
+++ b/meta/recipes-kernel/kexec/kexec-tools.inc
@@ -8,7 +8,8 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=ea5bed2f60d357618ca161ad539f7c0a \
                     file://kexec/kexec.c;beginline=1;endline=20;md5=af10f6ae4a8715965e648aa687ad3e09"
 DEPENDS = "zlib xz"
 
-SRC_URI = "${KERNELORG_MIRROR}/linux/utils/kernel/kexec/kexec-tools-${PV}.tar.gz"
+SRC_URI = "${KERNELORG_MIRROR}/linux/utils/kernel/kexec/kexec-tools-${PV}.tar.gz \
+           file://kexec-tools-Refine-kdump-device_tree-sort.patch"
 
 inherit autotools-brokensep
 
diff --git a/meta/recipes-kernel/kexec/kexec-tools/kexec-tools-Refine-kdump-device_tree-sort.patch b/meta/recipes-kernel/kexec/kexec-tools/kexec-tools-Refine-kdump-device_tree-sort.patch
new file mode 100644
index 0000000000..ab1fe96db2
--- /dev/null
+++ b/meta/recipes-kernel/kexec/kexec-tools/kexec-tools-Refine-kdump-device_tree-sort.patch
@@ -0,0 +1,82 @@
+kexec-tools: Refine kdump device_tree sort
+
+The commit b02d735bf was to rearrange the device-tree entries, and
+assumed that these entries are sorted in the ascending order. but
+acctually when I was validating kexec and kdump, the order of
+serial node still is changed. So the patch is to sort these entries
+by the directory name in ascending order.
+
+Upstream-Status: Pending
+
+Signed-off-by: Yang Wei <Wei.Yang@windriver.com>
+Signed-off-by: Chong Lu <Chong.Lu@windriver.com>
+---
+ kexec/arch/ppc/fs2dt.c |   13 ++++++++++---
+ kexec/fs2dt.c          |   13 ++++++++++---
+ 2 files changed, 20 insertions(+), 6 deletions(-)
+
+diff --git a/kexec/arch/ppc/fs2dt.c b/kexec/arch/ppc/fs2dt.c
+index 4121c7d..cc04b04 100644
+--- a/kexec/arch/ppc/fs2dt.c
++++ b/kexec/arch/ppc/fs2dt.c
+@@ -296,6 +296,9 @@ static int comparefunc(const void *dentry1, const void *dentry2)
+ {
+ 	char *str1 = (*(struct dirent **)dentry1)->d_name;
+ 	char *str2 = (*(struct dirent **)dentry2)->d_name;
++	char* ptr1 = strchr(str1, '@');
++	char* ptr2 = strchr(str2, '@');
++	int len1, len2;
+ 
+ 	/*
+ 	 * strcmp scans from left to right and fails to idetify for some
+@@ -303,9 +306,13 @@ static int comparefunc(const void *dentry1, const void *dentry2)
+ 	 * Therefore, we get the wrong sorted order like memory@10000000 and
+ 	 * memory@f000000.
+ 	 */
+-	if (strchr(str1, '@') && strchr(str2, '@') &&
+-		(strlen(str1) > strlen(str2)))
+-		return 1;
++	if (ptr1 && ptr2) {
++		len1 = ptr1 - str1;
++		len2 = ptr2 - str2;
++		if (!strncmp(str1, str2, len1 >len2 ? len1: len2) &&
++					(strlen(str1) > strlen(str2)))
++				return 1;
++	}
+ 
+ 	return strcmp(str1, str2);
+ }
+diff --git a/kexec/fs2dt.c b/kexec/fs2dt.c
+index 5e6b98d..1c0345b 100644
+--- a/kexec/fs2dt.c
++++ b/kexec/fs2dt.c
+@@ -475,6 +475,9 @@ static int comparefunc(const struct dirent **dentry1,
+ {
+ 	char *str1 = (*(struct dirent **)dentry1)->d_name;
+ 	char *str2 = (*(struct dirent **)dentry2)->d_name;
++	char* ptr1 = strchr(str1, '@');
++	char* ptr2 = strchr(str2, '@');
++	int len1, len2;
+ 
+ 	/*
+ 	 * strcmp scans from left to right and fails to idetify for some
+@@ -482,9 +485,13 @@ static int comparefunc(const struct dirent **dentry1,
+ 	 * Therefore, we get the wrong sorted order like memory@10000000 and
+ 	 * memory@f000000.
+ 	 */
+-	if (strchr(str1, '@') && strchr(str2, '@') &&
+-		(strlen(str1) > strlen(str2)))
+-		return 1;
++	if (ptr1 && ptr2) {
++		len1 = ptr1 - str1;
++		len2 = ptr2 - str2;
++		if (!strncmp(str1, str2, len1 >len2 ? len1: len2) &&
++					(strlen(str1) > strlen(str2)))
++				return 1;
++	}
+ 
+ 	return strcmp(str1, str2);
+ }
+-- 
+1.7.9.5
+