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authorFelix Fietkau <nbd@openwrt.org>2015-11-26 16:40:11 +0000
committerFelix Fietkau <nbd@openwrt.org>2015-11-26 16:40:11 +0000
commitb44a27885ff6e18f7a2ac03f4bfbb5dd23fee0d4 (patch)
tree813c960d6f0fd6a3f2eb90847974f00b55a22522 /target/linux/generic/patches-4.3
parent963fc89df2cf074bcf03e3010c7d36d12b2f4d34 (diff)
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kernel: revert a faulty upstream commit that was added with the spi-nor/m25p80 backport (fixes #20971)
Signed-off-by: Felix Fietkau <nbd@openwrt.org> SVN-Revision: 47664
Diffstat (limited to 'target/linux/generic/patches-4.3')
-rw-r--r--target/linux/generic/patches-4.3/141-Revert-mtd-spi-nor-disable-protection-for-Winbond-fl.patch35
-rw-r--r--target/linux/generic/patches-4.3/465-m25p80-mx-disable-software-protection.patch4
2 files changed, 37 insertions, 2 deletions
diff --git a/target/linux/generic/patches-4.3/141-Revert-mtd-spi-nor-disable-protection-for-Winbond-fl.patch b/target/linux/generic/patches-4.3/141-Revert-mtd-spi-nor-disable-protection-for-Winbond-fl.patch
new file mode 100644
index 0000000000..10b43d51bc
--- /dev/null
+++ b/target/linux/generic/patches-4.3/141-Revert-mtd-spi-nor-disable-protection-for-Winbond-fl.patch
@@ -0,0 +1,35 @@
+From: Felix Fietkau <nbd@openwrt.org>
+Date: Thu, 26 Nov 2015 17:03:46 +0100
+Subject: [PATCH] Revert "mtd: spi-nor: disable protection for Winbond flash at
+ startup"
+
+This reverts commit c6fc2171b249e73745c497b578b417a2946f1b2f.
+
+This commit is breaking read access on at least s25fl064k, but also
+possibly other Spansion flash chips.
+
+Any mtd read seems to succeed, but simply returns a zero-filled buffer.
+
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+---
+
+--- a/drivers/mtd/spi-nor/spi-nor.c
++++ b/drivers/mtd/spi-nor/spi-nor.c
+@@ -1194,14 +1194,13 @@ int spi_nor_scan(struct spi_nor *nor, co
+ mutex_init(&nor->lock);
+
+ /*
+- * Atmel, SST, Intel/Numonyx, and others serial NOR tend to power up
+- * with the software protection bits set
++ * Atmel, SST and Intel/Numonyx serial nor tend to power
++ * up with the software protection bits set
+ */
+
+ if (JEDEC_MFR(info) == SNOR_MFR_ATMEL ||
+ JEDEC_MFR(info) == SNOR_MFR_INTEL ||
+- JEDEC_MFR(info) == SNOR_MFR_SST ||
+- JEDEC_MFR(info) == SNOR_MFR_WINBOND) {
++ JEDEC_MFR(info) == SNOR_MFR_SST) {
+ write_enable(nor);
+ write_sr(nor, 0);
+ }
diff --git a/target/linux/generic/patches-4.3/465-m25p80-mx-disable-software-protection.patch b/target/linux/generic/patches-4.3/465-m25p80-mx-disable-software-protection.patch
index dcf594bad1..e977e41a4b 100644
--- a/target/linux/generic/patches-4.3/465-m25p80-mx-disable-software-protection.patch
+++ b/target/linux/generic/patches-4.3/465-m25p80-mx-disable-software-protection.patch
@@ -9,6 +9,6 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
if (JEDEC_MFR(info) == SNOR_MFR_ATMEL ||
JEDEC_MFR(info) == SNOR_MFR_INTEL ||
+ JEDEC_MFR(info) == SNOR_MFR_MACRONIX ||
- JEDEC_MFR(info) == SNOR_MFR_SST ||
- JEDEC_MFR(info) == SNOR_MFR_WINBOND) {
+ JEDEC_MFR(info) == SNOR_MFR_SST) {
write_enable(nor);
+ write_sr(nor, 0);