mtd: cfi_cmdset_0002: fix the check for valid primary extension versions

Valid primary extension versions are: 1.0, 1.1, 1.2, 1.3 [1][2].
Fix the check in cfi_cmdset_0002 accordingly.

[1] http://www.amd.com/us-en/assets/content_type/DownloadableAssets/cfi_r20.pdf, page 19
[2] http://www.amd.com/us-en/assets/content_type/DownloadableAssets/cfi_100_20011201.pdf

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Guillaume LECERF <glecerf@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 12 insertions, 3 deletions

diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index d81079ef91a5..749203f89b55 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -417,16 +417,25 @@ struct mtd_info *cfi_cmdset_0002(struct map_info *map, int primary)
                          */
                         cfi_fixup_major_minor(cfi, extp);
 
+                        /*
+                         * Valid primary extension versions are: 1.0, 1.1, 1.2, 1.3
+                         * see: http://www.amd.com/us-en/assets/content_type/DownloadableAssets/cfi_r20.pdf, page 19 and on
+                         *      http://www.amd.com/us-en/assets/content_type/DownloadableAssets/cfi_100_20011201.pdf
+                         */
                         if (extp->MajorVersion != '1' ||
-                            (extp->MinorVersion < '0' || extp->MinorVersion > '4')) {
+                            (extp->MajorVersion == '1' && ( extp->MinorVersion < '0' || extp->MinorVersion > '3'))) {
                                 printk(KERN_ERR "  Unknown Amd/Fujitsu Extended Query "
-                                       "version %c.%c.\n",  extp->MajorVersion,
-                                       extp->MinorVersion);
+                                       "version %c.%c (%#02x/%#02x).\n",
+                                       extp->MajorVersion, extp->MinorVersion,
+                                       extp->MajorVersion, extp->MinorVersion);
                                 kfree(extp);
                                 kfree(mtd);
                                 return NULL;
                         }
 
+                        printk(KERN_INFO "  Amd/Fujitsu Extended Query version %c.%c.\n",
+                               extp->MajorVersion, extp->MinorVersion);
+
                         /* Install our own private info structure */
                         cfi->cmdset_priv = extp;