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fix reboot after mtd operations on intel flash chip

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@3384 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2006-03-16 16:59:58 +00:00
parent df4ed8f0d2
commit b2af81841f
1 changed files with 101 additions and 0 deletions
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101
openwrt/target/linux/generic-2.4/patches/008-intel_flashchip_fix.patch Normal file
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@ -0,0 +1,101 @@
diff -urN linux.old/drivers/mtd/chips/cfi_cmdset_0001.c linux.dev/drivers/mtd/chips/cfi_cmdset_0001.c
--- linux.old/drivers/mtd/chips/cfi_cmdset_0001.c 2004-11-17 12:54:21.000000000 +0100
+++ linux.dev/drivers/mtd/chips/cfi_cmdset_0001.c 2006-03-16 17:25:04.000000000 +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:
@@ -1960,10 +1972,40 @@
}
}
+
+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);
diff -urN linux.old/include/linux/mtd/mtd.h linux.dev/include/linux/mtd/mtd.h
--- linux.old/include/linux/mtd/mtd.h 2003-08-25 13:44:44.000000000 +0200
+++ linux.dev/include/linux/mtd/mtd.h 2006-03-16 17:00:10.000000000 +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;
};