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authornbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>2011-08-15 00:15:36 +0000
committernbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>2011-08-15 00:15:36 +0000
commitf890117582829fe71bb877c26a6faf7c748b956d (patch)
treeffda584b59c9bcc179574f33ad53dc2966a1fbfe /target/linux/generic
parentf6d91bf8887cf558841d0cf41b72eeff2af6303a (diff)
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. git-svn-id: svn://svn.openwrt.org/openwrt/trunk@27984 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/generic')
-rw-r--r--target/linux/generic/patches-2.6.39/461-cfi_cmdset_0002_no_erase_suspend.patch11
-rw-r--r--target/linux/generic/patches-3.0/460-cfi_cmdset_0002_no_erase_suspend.patch11
-rw-r--r--target/linux/generic/patches-3.1/460-cfi_cmdset_0002_no_erase_suspend.patch11
3 files changed, 33 insertions, 0 deletions
diff --git a/target/linux/generic/patches-2.6.39/461-cfi_cmdset_0002_no_erase_suspend.patch b/target/linux/generic/patches-2.6.39/461-cfi_cmdset_0002_no_erase_suspend.patch
new file mode 100644
index 000000000..d7b44ef71
--- /dev/null
+++ b/target/linux/generic/patches-2.6.39/461-cfi_cmdset_0002_no_erase_suspend.patch
@@ -0,0 +1,11 @@
+--- a/drivers/mtd/chips/cfi_cmdset_0002.c
++++ b/drivers/mtd/chips/cfi_cmdset_0002.c
+@@ -684,7 +684,7 @@ static int get_chip(struct map_info *map
+ 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;
diff --git a/target/linux/generic/patches-3.0/460-cfi_cmdset_0002_no_erase_suspend.patch b/target/linux/generic/patches-3.0/460-cfi_cmdset_0002_no_erase_suspend.patch
new file mode 100644
index 000000000..04ef193a8
--- /dev/null
+++ b/target/linux/generic/patches-3.0/460-cfi_cmdset_0002_no_erase_suspend.patch
@@ -0,0 +1,11 @@
+--- a/drivers/mtd/chips/cfi_cmdset_0002.c
++++ b/drivers/mtd/chips/cfi_cmdset_0002.c
+@@ -685,7 +685,7 @@ static int get_chip(struct map_info *map
+ 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;
diff --git a/target/linux/generic/patches-3.1/460-cfi_cmdset_0002_no_erase_suspend.patch b/target/linux/generic/patches-3.1/460-cfi_cmdset_0002_no_erase_suspend.patch
new file mode 100644
index 000000000..04ef193a8
--- /dev/null
+++ b/target/linux/generic/patches-3.1/460-cfi_cmdset_0002_no_erase_suspend.patch
@@ -0,0 +1,11 @@
+--- a/drivers/mtd/chips/cfi_cmdset_0002.c
++++ b/drivers/mtd/chips/cfi_cmdset_0002.c
+@@ -685,7 +685,7 @@ static int get_chip(struct map_info *map
+ 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;