1 From: Felix Fietkau <nbd@nbd.name>
2 Subject: kernel: disable cfi cmdset 0002 erase suspend
4 on some platforms, erase suspend leads to data corruption and lockups when write
5 ops collide with erase ops. this has been observed on the buffalo wzr-hp-g300nh.
6 rather than play whack-a-mole with a hard to reproduce issue on a variety of devices,
7 simply disable erase suspend, as it will usually not produce any useful gain on
8 the small filesystems used on embedded hardware.
10 Signed-off-by: Felix Fietkau <nbd@nbd.name>
12 drivers/mtd/chips/cfi_cmdset_0002.c | 2 +-
13 1 file changed, 1 insertion(+), 1 deletion(-)
15 --- a/drivers/mtd/chips/cfi_cmdset_0002.c
16 +++ b/drivers/mtd/chips/cfi_cmdset_0002.c
17 @@ -913,7 +913,7 @@ static int get_chip(struct map_info *map
21 - if (!cfip || !(cfip->EraseSuspend & (0x1|0x2)) ||
22 + if (1 /* no suspend */ || !cfip || !(cfip->EraseSuspend & (0x1|0x2)) ||
23 !(mode == FL_READY || mode == FL_POINT ||
24 (mode == FL_WRITING && (cfip->EraseSuspend & 0x2))))