Merge branch 'fix' of git://git.kernel.org/pub/scm/linux/kernel/git/ycmiao/pxa-linux...

[linux-2.6-omap-h63xx.git] / include / linux / ata.h

diff --git a/include/linux/ata.h b/include/linux/ata.h
index a53318b8cbd0ea9a4b7a69f3376cb11036a5ff32..08a86d5cdf1b7ea2c6c995f1073aaa59092d9a8c 100644 (file)
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -731,12 +731,17 @@ static inline int ata_id_current_chs_valid(const u16 *id)
 
 static inline int ata_id_is_cfa(const u16 *id)
 {
-       if (id[ATA_ID_CONFIG] == 0x848A)        /* Standard CF */
+       if (id[ATA_ID_CONFIG] == 0x848A)        /* Traditional CF */
                return 1;
-       /* Could be CF hiding as standard ATA */
-       if (ata_id_major_version(id) >= 3 &&
-           id[ATA_ID_COMMAND_SET_1] != 0xFFFF &&
-          (id[ATA_ID_COMMAND_SET_1] & (1 << 2)))
+       /*
+        * CF specs don't require specific value in the word 0 anymore and yet
+        * they forbid to report the ATA version in the word 80 and require the
+        * CFA feature set support to be indicated in the word 83 in this case.
+        * Unfortunately, some cards only follow either of this requirements,
+        * and while those that don't indicate CFA feature support need some
+        * sort of quirk list, it seems impractical for the ones that do...
+        */
+       if ((id[ATA_ID_COMMAND_SET_2] & 0xC004) == 0x4004)
                return 1;
        return 0;
 }