[MTD] [NOR] fix ctrl-alt-del can't reboot for intel flash bug

[linux-2.6] / drivers / mtd / chips / cfi_cmdset_0001.c

diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c
index c655e971c15864019a09258ba719048df42a8a88..3aa3dca56ae6ea8dd16cef96d222905a14516a76 100644 (file)
--- a/drivers/mtd/chips/cfi_cmdset_0001.c
+++ b/drivers/mtd/chips/cfi_cmdset_0001.c
@@ -653,7 +653,7 @@ static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr
  resettime:
        timeo = jiffies + HZ;
  retry:
-       if (chip->priv && (mode == FL_WRITING || mode == FL_ERASING || mode == FL_OTP_WRITE)) {
+       if (chip->priv && (mode == FL_WRITING || mode == FL_ERASING || mode == FL_OTP_WRITE || mode == FL_SHUTDOWN)) {
                /*
                 * OK. We have possibility for contension on the write/erase
                 * operations which are global to the real chip and not per
@@ -798,6 +798,9 @@ static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr
                if (mode == FL_READY && chip->oldstate == FL_READY)
                        return 0;
 
+       case FL_SHUTDOWN:
+               /* The machine is rebooting now,so no one can get chip anymore */
+               return -EIO;
        default:
        sleep:
                set_current_state(TASK_UNINTERRUPTIBLE);
@@ -2409,10 +2412,10 @@ static int cfi_intelext_reset(struct mtd_info *mtd)
                   and switch to array mode so any bootloader in
                   flash is accessible for soft reboot. */
                spin_lock(chip->mutex);
-               ret = get_chip(map, chip, chip->start, FL_SYNCING);
+               ret = get_chip(map, chip, chip->start, FL_SHUTDOWN);
                if (!ret) {
                        map_write(map, CMD(0xff), chip->start);
-                       chip->state = FL_READY;
+                       chip->state = FL_SHUTDOWN;
                }
                spin_unlock(chip->mutex);
        }