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authorFelix Fietkau <nbd@openwrt.org>2011-08-15 00:15:36 +0000
committerFelix Fietkau <nbd@openwrt.org>2011-08-15 00:15:36 +0000
commit50817f6afed0cd2286a4bd5f9a23f375319f9712 (patch)
tree1320816b611aa6482e45cf2125334164b450addf
parentb413f797cfcace585a258478a18e1d4bb1faca8e (diff)
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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. SVN-Revision: 27984
-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 0000000000..d7b44ef719
--- /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 0000000000..04ef193a86
--- /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 0000000000..04ef193a86
--- /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;