ata: fix ata_id_has_devslp()

[ Upstream commit 9c6e09a434e1317e09b78b3b69cd384022ec9a03 ]

ACS-5 section
7.13.6.36 Word 78: Serial ATA features supported
states that:

If word 76 is not 0000h or FFFFh, word 78 reports the features supported
by the device. If this word is not supported, the word shall be cleared
to zero.

(This text also exists in really old ACS standards, e.g. ACS-3.)

Additionally, move the macro to the other ATA_ID_FEATURE_SUPP macros
(which already have this check), thus making it more likely that the
next ATA_ID_FEATURE_SUPP macro that is added will include this check.

Fixes: 65fe1f0f66a5 ("ahci: implement aggressive SATA device sleep support")
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/include/linux/ata.h b/include/linux/ata.h
index 8e5e7bf4a37faeb050e20d25f41215e03d5e50ec..315a7eaba6550b083320439b6eed896c0f3cea0b 100644 (file)
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -572,6 +572,10 @@ struct ata_bmdma_prd {
        ((((id)[ATA_ID_SATA_CAPABILITY] != 0x0000) && \
          ((id)[ATA_ID_SATA_CAPABILITY] != 0xffff)) && \
         ((id)[ATA_ID_FEATURE_SUPP] & (1 << 2)))
+#define ata_id_has_devslp(id)  \
+       ((((id)[ATA_ID_SATA_CAPABILITY] != 0x0000) && \
+         ((id)[ATA_ID_SATA_CAPABILITY] != 0xffff)) && \
+        ((id)[ATA_ID_FEATURE_SUPP] & (1 << 8)))
 #define ata_id_iordy_disable(id) ((id)[ATA_ID_CAPABILITY] & (1 << 10))
 #define ata_id_has_iordy(id) ((id)[ATA_ID_CAPABILITY] & (1 << 11))
 #define ata_id_u32(id,n)       \
@@ -584,7 +588,6 @@ struct ata_bmdma_prd {
 
 #define ata_id_cdb_intr(id)    (((id)[ATA_ID_CONFIG] & 0x60) == 0x20)
 #define ata_id_has_da(id)      ((id)[ATA_ID_SATA_CAPABILITY_2] & (1 << 4))
-#define ata_id_has_devslp(id)  ((id)[ATA_ID_FEATURE_SUPP] & (1 << 8))
 #define ata_id_has_ncq_autosense(id) \
                                ((id)[ATA_ID_FEATURE_SUPP] & (1 << 7))