kernel: split patches folder up into backport, pending and hack folders

[openwrt/openwrt.git] / target / linux / generic / pending-4.9 / 460-mtd-cfi_cmdset_0002-no-erase_suspend.patch

diff --git a/target/linux/generic/pending-4.9/460-mtd-cfi_cmdset_0002-no-erase_suspend.patch b/target/linux/generic/pending-4.9/460-mtd-cfi_cmdset_0002-no-erase_suspend.patch
new file mode 100644 (file)
index 0000000..3cabff3
--- /dev/null
+++ b/target/linux/generic/pending-4.9/460-mtd-cfi_cmdset_0002-no-erase_suspend.patch
@@ -0,0 +1,30 @@
+From: Felix Fietkau <nbd@nbd.name>
+Subject: kernel: disable cfi cmdset 0002 erase suspend
+
+on some platforms, erase suspend leads to data corruption and lockups when write
+ops collide with erase ops. this has been observed on the buffalo wzr-hp-g300nh.
+rather than play whack-a-mole with a hard to reproduce issue on a variety of devices,
+simply disable erase suspend, as it will usually not produce any useful gain on
+the small filesystems used on embedded hardware.
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+ drivers/mtd/chips/cfi_cmdset_0002.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
+index 9dca881bb378..ea4db1917334 100644
+--- a/drivers/mtd/chips/cfi_cmdset_0002.c
++++ b/drivers/mtd/chips/cfi_cmdset_0002.c
+@@ -807,7 +807,7 @@ static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr
+               return 0;
+ 
+       case FL_ERASING:
+-              if (!cfip || !(cfip->EraseSuspend & (0x1|0x2)) ||
++              if (1 /* no suspend */ || !cfip || !(cfip->EraseSuspend & (0x1|0x2)) ||
+                   !(mode == FL_READY || mode == FL_POINT ||
+                   (mode == FL_WRITING && (cfip->EraseSuspend & 0x2))))
+                       goto sleep;
+-- 
+2.11.0
+