2018-11-01 16:57:55 +00:00
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From: Felix Fietkau <nbd@nbd.name>
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Subject: kernel: disable cfi cmdset 0002 erase suspend
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on some platforms, erase suspend leads to data corruption and lockups when write
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ops collide with erase ops. this has been observed on the buffalo wzr-hp-g300nh.
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rather than play whack-a-mole with a hard to reproduce issue on a variety of devices,
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simply disable erase suspend, as it will usually not produce any useful gain on
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the small filesystems used on embedded hardware.
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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drivers/mtd/chips/cfi_cmdset_0002.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/drivers/mtd/chips/cfi_cmdset_0002.c
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+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
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2018-11-01 17:01:44 +00:00
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@@ -812,7 +812,7 @@ static int get_chip(struct map_info *map
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2018-11-01 16:57:55 +00:00
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return 0;
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case FL_ERASING:
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- if (!cfip || !(cfip->EraseSuspend & (0x1|0x2)) ||
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+ if (1 /* no suspend */ || !cfip || !(cfip->EraseSuspend & (0x1|0x2)) ||
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!(mode == FL_READY || mode == FL_POINT ||
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(mode == FL_WRITING && (cfip->EraseSuspend & 0x2))))
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goto sleep;
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