diff options
| author | Tadashi Abe <tabe@mvista.com> | 2011-05-19 15:58:15 +0900 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2011-05-25 02:11:11 +0100 |
| commit | 100f2341e305f98de3aa12fb472771ab029cbda7 (patch) | |
| tree | 40cc6edf73cf06b6392a18fd496cb9dc071c98d4 /drivers/mtd/chips/cfi_cmdset_0020.c | |
| parent | 52534f2dba5d033c0c33e515faa2767d7e8e986a (diff) | |
mtd: fix hang-up in cfi erase and read contention
cfi erase command hangs up when erase and read contention occurs.
If read runs at the same address as erase operation, read issues
Erase-Suspend via get_chip() and the erase goes into sleep in wait queue.
But in this case, read operation exits by time-out without waking it up.
I think the other variants (0001, 0020 and lpddr) have the same problem too.
Tested and verified the patch only on CFI-0002 flash, though.
Signed-off-by: Tadashi Abe <tabe@mvista.com>
Acked-by: Joakim Tjernlund <joakim.tjernlund@transmode.se>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd/chips/cfi_cmdset_0020.c')
| -rw-r--r-- | drivers/mtd/chips/cfi_cmdset_0020.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/mtd/chips/cfi_cmdset_0020.c b/drivers/mtd/chips/cfi_cmdset_0020.c index ed56ad3884f..179814a95f3 100644 --- a/drivers/mtd/chips/cfi_cmdset_0020.c +++ b/drivers/mtd/chips/cfi_cmdset_0020.c @@ -296,6 +296,7 @@ static inline int do_read_onechip(struct map_info *map, struct flchip *chip, lof /* make sure we're in 'read status' mode */ map_write(map, CMD(0x70), cmd_addr); chip->state = FL_ERASING; + wake_up(&chip->wq); mutex_unlock(&chip->mutex); printk(KERN_ERR "Chip not ready after erase " "suspended: status = 0x%lx\n", status.x[0]); |