[MTD] CFI: remove major/minor version check for command set 0x0002

The NOR Flash memory K8P2815UQB from Samsung uses the major version
number '0'. Add a quirk to cope with it.

Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

2 files changed, 11 insertions, 0 deletions

diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index f9c435a42670..94bb61e19047 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -322,6 +322,14 @@ static struct cfi_fixup fixup_table[] = {
 };
 
 
+static void cfi_fixup_major_minor(struct cfi_private *cfi,
+                                  struct cfi_pri_amdstd *extp)
+{
+        if (cfi->mfr == CFI_MFR_SAMSUNG && cfi->id == 0x257e &&
+            extp->MajorVersion == '0')
+                extp->MajorVersion = '1';
+}
+
 struct mtd_info *cfi_cmdset_0002(struct map_info *map, int primary)
 {
         struct cfi_private *cfi = map->fldrv_priv;
@@ -363,6 +371,8 @@ struct mtd_info *cfi_cmdset_0002(struct map_info *map, int primary)
                         return NULL;
                 }
 
+                cfi_fixup_major_minor(cfi, extp);
+
                 if (extp->MajorVersion != '1' ||
                     (extp->MinorVersion < '0' || extp->MinorVersion > '4')) {
                         printk(KERN_ERR "  Unknown Amd/Fujitsu Extended Query "
diff --git a/include/linux/mtd/cfi.h b/include/linux/mtd/cfi.h
index 00e2b575021f..88d3d8fbf9f2 100644
--- a/include/linux/mtd/cfi.h
+++ b/include/linux/mtd/cfi.h
@@ -520,6 +520,7 @@ struct cfi_fixup {
 
 #define CFI_MFR_AMD 0x0001
 #define CFI_MFR_ATMEL 0x001F
+#define CFI_MFR_SAMSUNG 0x00EC
 #define CFI_MFR_ST  0x0020      /* STMicroelectronics */
 
 void cfi_fixup(struct mtd_info *mtd, struct cfi_fixup* fixups);