X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=include%2Flinux%2Fata.h;h=08a86d5cdf1b7ea2c6c995f1073aaa59092d9a8c;hb=fa12868e59f5f49bc42b8befd94c531bb07ec120;hp=a53318b8cbd0ea9a4b7a69f3376cb11036a5ff32;hpb=6572a281cfd805dd54718597d6c33261b5be052b;p=linux-2.6-omap-h63xx.git

diff --git a/include/linux/ata.h b/include/linux/ata.h
index a53318b8cbd..08a86d5cdf1 100644
--- 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;
 }