_Hopefully_ nailing down the last of the sata_nv EH problems.
Plus a key sata_promise fix.

Please pull from 'upstream-linus' branch of
master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev.git upstream-linus

to receive the following updates:

drivers/ata/libata-core.c | 6 +++-
drivers/ata/libata-scsi.c | 7 +++--
drivers/ata/sata_nv.c | 53 ++++++++++++++++++++-----------------------
drivers/ata/sata_promise.c | 20 ++++++++++++++++
drivers/ata/sata_via.c | 4 ++-
include/linux/libata.h | 2 +
6 files changed, 58 insertions(+), 34 deletions(-)

Elias Oltmanns (1):
libata: Fix a potential race condition in ata_scsi_park_show()

Marcin Slusarz (1):
sata_via: restore vt*_prepare_host error handling

Mikael Pettersson (1):
sata_promise: add ATA engine reset to reset ops

Tejun Heo (3):
sata_nv: fix generic, nf2/3 detection regression
libata: implement ATA_HORKAGE_ATAPI_MOD16_DMA and apply it
libata: mask off DET when restoring SControl for detach

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 82af701..622350d 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -4024,6 +4024,7 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {

/* Weird ATAPI devices */
{ "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
+ { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA },

/* Devices we expect to fail diagnostics */

@@ -4444,7 +4445,8 @@ int atapi_check_dma(struct ata_queued_cmd *qc)
/* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
* few ATAPI devices choke on such DMA requests.
*/
- if (unlikely(qc->nbytes & 15))
+ if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
+ unlikely(qc->nbytes & 15))
return 1;

if (ap->ops->check_atapi_dma)
@@ -5934,7 +5936,7 @@ static void ata_port_detach(struct ata_port *ap)
* to us. Restore SControl and disable all existing devices.
*/
__ata_port_for_each_link(link, ap) {
- sata_scr_write(link, SCR_CONTROL, link->saved_scontrol);
+ sata_scr_write(link, SCR_CONTROL, link->saved_scontrol & 0xff0);
ata_link_for_each_dev(dev, link)
ata_dev_disable(dev);
}
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index bbb30d8..3fa75ea 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -190,7 +190,7 @@ static ssize_t ata_scsi_park_show(struct device *device,
struct ata_port *ap;
struct ata_link *link;
struct ata_device *dev;
- unsigned long flags;
+ unsigned long flags, now;
unsigned int uninitialized_var(msecs);
int rc = 0;

@@ -208,10 +208,11 @@ static ssize_t ata_scsi_park_show(struct device *device,
}

link = dev->link;
+ now = jiffies;
if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
link->eh_context.unloaded_mask & (1 << dev->devno) &&
- time_after(dev->unpark_deadline, jiffies))
- msecs = jiffies_to_msecs(dev->unpark_deadline - jiffies);
+ time_after(dev->unpark_deadline, now))
+ msecs = jiffies_to_msecs(dev->unpark_deadline - now);
else
msecs = 0;

diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index fae3841..6f14606 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -307,10 +307,10 @@ static int nv_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);

static void nv_nf2_freeze(struct ata_port *ap);
static void nv_nf2_thaw(struct ata_port *ap);
+static int nv_nf2_hardreset(struct ata_link *link, unsigned int *class,
+ unsigned long deadline);
static void nv_ck804_freeze(struct ata_port *ap);
static void nv_ck804_thaw(struct ata_port *ap);
-static int nv_hardreset(struct ata_link *link, unsigned int *class,
- unsigned long deadline);
static int nv_adma_slave_config(struct scsi_device *sdev);
static int nv_adma_check_atapi_dma(struct ata_queued_cmd *qc);
static void nv_adma_qc_prep(struct ata_queued_cmd *qc);
@@ -405,17 +405,8 @@ static struct scsi_host_template nv_swncq_sht = {
.slave_configure = nv_swncq_slave_config,
};

-/* OSDL bz3352 reports that some nv controllers can't determine device
- * signature reliably and nv_hardreset is implemented to work around
- * the problem. This was reported on nf3 and it's unclear whether any
- * other controllers are affected. However, the workaround has been
- * applied to all variants and there isn't much to gain by trying to
- * find out exactly which ones are affected at this point especially
- * because NV has moved over to ahci for newer controllers.
- */
static struct ata_port_operations nv_common_ops = {
.inherits = &ata_bmdma_port_ops,
- .hardreset = nv_hardreset,
.scr_read = nv_scr_read,
.scr_write = nv_scr_write,
};
@@ -429,12 +420,22 @@ static struct ata_port_operations nv_generic_ops = {
.hardreset = ATA_OP_NULL,
};

+/* OSDL bz3352 reports that nf2/3 controllers can't determine device
+ * signature reliably. Also, the following thread reports detection
+ * failure on cold boot with the standard debouncing timing.
+ *
+ * http://thread.gmane.org/gmane.linux.ide/34098
+ *
+ * Debounce with hotplug timing and request follow-up SRST.
+ */
static struct ata_port_operations nv_nf2_ops = {
.inherits = &nv_common_ops,
.freeze = nv_nf2_freeze,
.thaw = nv_nf2_thaw,
+ .hardreset = nv_nf2_hardreset,
};

+/* CK804 finally gets hardreset right */
static struct ata_port_operations nv_ck804_ops = {
.inherits = &nv_common_ops,
.freeze = nv_ck804_freeze,
@@ -443,7 +444,7 @@ static struct ata_port_operations nv_ck804_ops = {
};

static struct ata_port_operations nv_adma_ops = {
- .inherits = &nv_common_ops,
+ .inherits = &nv_ck804_ops,

.check_atapi_dma = nv_adma_check_atapi_dma,
.sff_tf_read = nv_adma_tf_read,
@@ -467,7 +468,7 @@ static struct ata_port_operations nv_adma_ops = {
};

static struct ata_port_operations nv_swncq_ops = {
- .inherits = &nv_common_ops,
+ .inherits = &nv_generic_ops,

.qc_defer = ata_std_qc_defer,
.qc_prep = nv_swncq_qc_prep,
@@ -1553,6 +1554,17 @@ static void nv_nf2_thaw(struct ata_port *ap)
iowrite8(mask, scr_addr + NV_INT_ENABLE);
}

+static int nv_nf2_hardreset(struct ata_link *link, unsigned int *class,
+ unsigned long deadline)
+{
+ bool online;
+ int rc;
+
+ rc = sata_link_hardreset(link, sata_deb_timing_hotplug, deadline,
+ &online, NULL);
+ return online ? -EAGAIN : rc;
+}
+
static void nv_ck804_freeze(struct ata_port *ap)
{
void __iomem *mmio_base = ap->host->iomap[NV_MMIO_BAR];
@@ -1605,21 +1617,6 @@ static void nv_mcp55_thaw(struct ata_port *ap)
ata_sff_thaw(ap);
}

-static int nv_hardreset(struct ata_link *link, unsigned int *class,
- unsigned long deadline)
-{
- int rc;
-
- /* SATA hardreset fails to retrieve proper device signature on
- * some controllers. Request follow up SRST. For more info,
- * see http://bugzilla.kernel.org/show_bug.cgi?id=3352
- */
- rc = sata_sff_hardreset(link, class, deadline);
- if (rc)
- return rc;
- return -EAGAIN;
-}
-
static void nv_adma_error_handler(struct ata_port *ap)
{
struct nv_adma_port_priv *pp = ap->private_data;
diff --git a/drivers/ata/sata_promise.c b/drivers/ata/sata_promise.c
index 750d8cd..ba9a257 100644
--- a/drivers/ata/sata_promise.c
+++ b/drivers/ata/sata_promise.c
@@ -153,6 +153,10 @@ static void pdc_freeze(struct ata_port *ap);
static void pdc_sata_freeze(struct ata_port *ap);
static void pdc_thaw(struct ata_port *ap);
static void pdc_sata_thaw(struct ata_port *ap);
+static int pdc_pata_softreset(struct ata_link *link, unsigned int *class,
+ unsigned long deadline);
+static int pdc_sata_hardreset(struct ata_link *link, unsigned int *class,
+ unsigned long deadline);
static void pdc_error_handler(struct ata_port *ap);
static void pdc_post_internal_cmd(struct ata_queued_cmd *qc);
static int pdc_pata_cable_detect(struct ata_port *ap);
@@ -186,6 +190,7 @@ static struct ata_port_operations pdc_sata_ops = {
.scr_read = pdc_sata_scr_read,
.scr_write = pdc_sata_scr_write,
.port_start = pdc_sata_port_start,
+ .hardreset = pdc_sata_hardreset,
};

/* First-generation chips need a more restrictive ->check_atapi_dma op */
@@ -200,6 +205,7 @@ static struct ata_port_operations pdc_pata_ops = {
.freeze = pdc_freeze,
.thaw = pdc_thaw,
.port_start = pdc_common_port_start,
+ .softreset = pdc_pata_softreset,
};

static const struct ata_port_info pdc_port_info[] = {
@@ -693,6 +699,20 @@ static void pdc_sata_thaw(struct ata_port *ap)
readl(host_mmio + hotplug_offset); /* flush */
}

+static int pdc_pata_softreset(struct ata_link *link, unsigned int *class,
+ unsigned long deadline)
+{
+ pdc_reset_port(link->ap);
+ return ata_sff_softreset(link, class, deadline);
+}
+
+static int pdc_sata_hardreset(struct ata_link *link, unsigned int *class,
+ unsigned long deadline)
+{
+ pdc_reset_port(link->ap);
+ return sata_sff_hardreset(link, class, deadline);
+}
+
static void pdc_error_handler(struct ata_port *ap)
{
if (!(ap->pflags & ATA_PFLAG_FROZEN))
diff --git a/drivers/ata/sata_via.c b/drivers/ata/sata_via.c
index 62367fe..c18935f 100644
--- a/drivers/ata/sata_via.c
+++ b/drivers/ata/sata_via.c
@@ -602,8 +602,10 @@ static int svia_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
rc = vt8251_prepare_host(pdev, &host);
break;
default:
- return -EINVAL;
+ rc = -EINVAL;
}
+ if (rc)
+ return rc;

svia_configure(pdev);

diff --git a/include/linux/libata.h b/include/linux/libata.h
index f5441ed..c7665a4 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -373,6 +373,8 @@ enum {
ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
+ ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
+ not multiple of 16 bytes */

/* DMA mask for user DMA control: User visible values; DO NOT
renumber */
--
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