openwrt-xburst/target/linux/generic-2.4/patches/008-intel_flashchip_fix.patch

Index: linux-2.4.35.4/drivers/mtd/chips/cfi_cmdset_0001.c
===================================================================
--- linux-2.4.35.4.orig/drivers/mtd/chips/cfi_cmdset_0001.c	2007-12-15 05:19:42.414838122 +0100
+++ linux-2.4.35.4/drivers/mtd/chips/cfi_cmdset_0001.c	2007-12-15 05:19:50.315288342 +0100
@@ -28,10 +28,18 @@
 #include <linux/slab.h>
 #include <linux/delay.h>
 #include <linux/interrupt.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
 #include <linux/mtd/map.h>
 #include <linux/mtd/cfi.h>
 #include <linux/mtd/compatmac.h>
 
+#ifndef container_of
+#define container_of(ptr, type, member) ({                      \
+		        const typeof( ((type *)0)->member ) *__mptr = (ptr);    \
+			        (type *)( (char *)__mptr - offsetof(type,member) );})
+#endif
+
 // debugging, turns off buffer write mode #define FORCE_WORD_WRITE
 
 static int cfi_intelext_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
@@ -45,6 +53,7 @@
 static int cfi_intelext_unlock(struct mtd_info *mtd, loff_t ofs, size_t len);
 static int cfi_intelext_suspend (struct mtd_info *);
 static void cfi_intelext_resume (struct mtd_info *);
+static int cfi_intelext_reboot(struct notifier_block *nb, unsigned long val, void *v);
 
 static void cfi_intelext_destroy(struct mtd_info *);
 
@@ -288,6 +297,9 @@
 	map->fldrv = &cfi_intelext_chipdrv;
 	MOD_INC_USE_COUNT;
 	mtd->name = map->name;
+	mtd->reboot_notifier.notifier_call = cfi_intelext_reboot;
+	register_reboot_notifier(&mtd->reboot_notifier);
+
 	return mtd;
 
  setup_err:
@@ -1961,10 +1973,40 @@
 	}
 }
 
+
+static void cfi_intelext_reset(struct mtd_info *mtd)
+{
+	struct map_info *map = mtd->priv;
+	struct cfi_private *cfi = map->fldrv_priv;
+	int i;
+	struct flchip *chip;
+
+	cfi_intelext_sync(mtd);
+	for (i=0; i<cfi->numchips; i++) {
+		chip = &cfi->chips[i];
+		
+		spin_lock(chip->mutex);
+		cfi_write(map, CMD(0xFF), 0);
+		chip->state = FL_READY;
+		spin_unlock(chip->mutex);
+	}
+}
+
+static int cfi_intelext_reboot(struct notifier_block *nb, unsigned long val, void *v)
+{
+	struct mtd_info *mtd;
+
+	mtd = container_of(nb, struct mtd_info, reboot_notifier);
+	cfi_intelext_reset(mtd);
+	return NOTIFY_DONE;
+}
+
 static void cfi_intelext_destroy(struct mtd_info *mtd)
 {
 	struct map_info *map = mtd->priv;
 	struct cfi_private *cfi = map->fldrv_priv;
+	cfi_intelext_reset(mtd);
+	unregister_reboot_notifier(&mtd->reboot_notifier);
 	kfree(cfi->cmdset_priv);
 	kfree(cfi->cfiq);
 	kfree(cfi);
Index: linux-2.4.35.4/include/linux/mtd/mtd.h
===================================================================
--- linux-2.4.35.4.orig/include/linux/mtd/mtd.h	2007-12-15 05:19:42.422838578 +0100
+++ linux-2.4.35.4/include/linux/mtd/mtd.h	2007-12-15 05:19:50.315288342 +0100
@@ -10,6 +10,7 @@
 #include <linux/version.h>
 #include <linux/types.h>
 #include <linux/mtd/compatmac.h>
+#include <linux/notifier.h>
 #include <linux/module.h>
 #include <linux/uio.h>
 
@@ -217,6 +218,8 @@
 	int (*suspend) (struct mtd_info *mtd);
 	void (*resume) (struct mtd_info *mtd);
 
+	struct notifier_block reboot_notifier;
+
 	void *priv;
 };