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/lpddr | |
| parent | 52534f2dba5d033c0c33e515faa2767d7e8e986a (diff) | |
| download | linux-100f2341e305f98de3aa12fb472771ab029cbda7.tar.gz linux-100f2341e305f98de3aa12fb472771ab029cbda7.tar.bz2 linux-100f2341e305f98de3aa12fb472771ab029cbda7.zip | |
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/lpddr')
| -rw-r--r-- | drivers/mtd/lpddr/lpddr_cmds.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/drivers/mtd/lpddr/lpddr_cmds.c b/drivers/mtd/lpddr/lpddr_cmds.c index 12679925b420..16dcd1c76baf 100644 --- a/drivers/mtd/lpddr/lpddr_cmds.c +++ b/drivers/mtd/lpddr/lpddr_cmds.c @@ -313,12 +313,7 @@ static int chip_ready(struct map_info *map, struct flchip *chip, int mode) if (ret) { /* Oops. something got wrong. */ /* Resume and pretend we weren't here. */ - map_write(map, CMD(LPDDR_RESUME), - map->pfow_base + PFOW_COMMAND_CODE); - map_write(map, CMD(LPDDR_START_EXECUTION), - map->pfow_base + PFOW_COMMAND_EXECUTE); - chip->state = FL_ERASING; - chip->oldstate = FL_READY; + put_chip(map, chip); printk(KERN_ERR "%s: suspend operation failed." "State may be wrong \n", map->name); return -EIO; |