5 files changed, 36 insertions, 8 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 61a8f486306b..d76e07798e05 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8019,6 +8019,16 @@ F:	drivers/ata/
 F:      include/linux/ata.h
 F:      include/linux/libata.h
 
+SERIAL ATA AHCI PLATFORM devices support
+M:      Hans de Goede <hdegoede@redhat.com>
+M:      Tejun Heo <tj@kernel.org>
+L:      linux-ide@vger.kernel.org
+T:      git git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata.git
+S:      Supported
+F:      drivers/ata/ahci_platform.c
+F:      drivers/ata/libahci_platform.c
+F:      include/linux/ahci_platform.h
+
 SERVER ENGINES 10Gbps iSCSI - BladeEngine 2 DRIVER
 M:      Jayamohan Kallickal <jayamohan.kallickal@emulex.com>
 L:      linux-scsi@vger.kernel.org
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index dae5607e1115..4cd52a4541a9 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -456,6 +456,7 @@ static const struct pci_device_id ahci_pci_tbl[] = {
 
         /* Promise */
         { PCI_VDEVICE(PROMISE, 0x3f20), board_ahci },   /* PDC42819 */
+        { PCI_VDEVICE(PROMISE, 0x3781), board_ahci },   /* FastTrak TX8660 ahci-mode */
 
         /* Asmedia */
         { PCI_VDEVICE(ASMEDIA, 0x0601), board_ahci },   /* ASM1060 */
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 18d97d5c7d90..d19c37a7abc9 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -4787,6 +4787,10 @@ void swap_buf_le16(u16 *buf, unsigned int buf_words)
  *      ata_qc_new - Request an available ATA command, for queueing
  *      @ap: target port
  *
+ *      Some ATA host controllers may implement a queue depth which is less
+ *      than ATA_MAX_QUEUE. So we shouldn't allocate a tag which is beyond
+ *      the hardware limitation.
+ *
  *      LOCKING:
  *      None.
  */
@@ -4794,14 +4798,16 @@ void swap_buf_le16(u16 *buf, unsigned int buf_words)
 static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
 {
         struct ata_queued_cmd *qc = NULL;
-        unsigned int i, tag;
+        unsigned int i, tag, max_queue;
+
+        max_queue = ap->scsi_host->can_queue;
 
         /* no command while frozen */
         if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
                 return NULL;
 
-        for (i = 0; i < ATA_MAX_QUEUE; i++) {
-                tag = (i + ap->last_tag + 1) % ATA_MAX_QUEUE;
+        for (i = 0, tag = ap->last_tag + 1; i < max_queue; i++, tag++) {
+                tag = tag < max_queue ? tag : 0;
 
                 /* the last tag is reserved for internal command. */
                 if (tag == ATA_TAG_INTERNAL)
@@ -6169,6 +6175,16 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
 {
         int i, rc;
 
+        /*
+         * The max queue supported by hardware must not be greater than
+         * ATA_MAX_QUEUE.
+         */
+        if (sht->can_queue > ATA_MAX_QUEUE) {
+                dev_err(host->dev, "BUG: the hardware max queue is too large\n");
+                WARN_ON(1);
+                return -EINVAL;
+        }
+
         /* host must have been started */
         if (!(host->flags & ATA_HOST_STARTED)) {
                 dev_err(host->dev, "BUG: trying to register unstarted host\n");
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 6760fc4e85b8..dad83df555c4 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1811,7 +1811,7 @@ static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc,
         case ATA_DEV_ATA:
                 if (err & ATA_ICRC)
                         qc->err_mask |= AC_ERR_ATA_BUS;
-                if (err & ATA_UNC)
+                if (err & (ATA_UNC | ATA_AMNF))
                         qc->err_mask |= AC_ERR_MEDIA;
                 if (err & ATA_IDNF)
                         qc->err_mask |= AC_ERR_INVALID;
@@ -2556,11 +2556,12 @@ static void ata_eh_link_report(struct ata_link *link)
                 }
 
                 if (cmd->command != ATA_CMD_PACKET &&
-                    (res->feature & (ATA_ICRC | ATA_UNC | ATA_IDNF |
-                                     ATA_ABORTED)))
-                        ata_dev_err(qc->dev, "error: { %s%s%s%s}\n",
+                    (res->feature & (ATA_ICRC | ATA_UNC | ATA_AMNF |
+                                     ATA_IDNF | ATA_ABORTED)))
+                        ata_dev_err(qc->dev, "error: { %s%s%s%s%s}\n",
                           res->feature & ATA_ICRC ? "ICRC " : "",
                           res->feature & ATA_UNC ? "UNC " : "",
+                          res->feature & ATA_AMNF ? "AMNF " : "",
                           res->feature & ATA_IDNF ? "IDNF " : "",
                           res->feature & ATA_ABORTED ? "ABRT " : "");
 #endif
diff --git a/drivers/ata/pata_ep93xx.c b/drivers/ata/pata_ep93xx.c
index 6ad5c072ce34..4d37c5415fc7 100644
--- a/drivers/ata/pata_ep93xx.c
+++ b/drivers/ata/pata_ep93xx.c
@@ -915,7 +915,7 @@ static int ep93xx_pata_probe(struct platform_device *pdev)
         struct ep93xx_pata_data *drv_data;
         struct ata_host *host;
         struct ata_port *ap;
-        unsigned int irq;
+        int irq;
         struct resource *mem_res;
         void __iomem *ide_base;
         int err;