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authorPaul Mackerras <paulus@samba.org>2007-12-21 22:21:08 +1100
committerPaul Mackerras <paulus@samba.org>2007-12-21 22:21:08 +1100
commitc2a7dcad9f0d92d7a96e735abb8bec7b9c621536 (patch)
treebf9b20fdd5ab07e5b0e4e0b95c6a3dbab1005cb9 /drivers/ata/libata-acpi.c
parent373a6da165ac3012a74fd072da340eabca55d031 (diff)
parentea67db4cdbbf7f4e74150e71da0984e25121f500 (diff)
Merge branch 'linux-2.6'
Diffstat (limited to 'drivers/ata/libata-acpi.c')
-rw-r--r--drivers/ata/libata-acpi.c387
1 files changed, 270 insertions, 117 deletions
diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index 545ea865ceb..7bf4befd96b 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -6,6 +6,7 @@
* Copyright (C) 2006 Randy Dunlap
*/
+#include <linux/module.h>
#include <linux/ata.h>
#include <linux/delay.h>
#include <linux/device.h>
@@ -25,6 +26,18 @@
#include <acpi/acmacros.h>
#include <acpi/actypes.h>
+enum {
+ ATA_ACPI_FILTER_SETXFER = 1 << 0,
+ ATA_ACPI_FILTER_LOCK = 1 << 1,
+
+ ATA_ACPI_FILTER_DEFAULT = ATA_ACPI_FILTER_SETXFER |
+ ATA_ACPI_FILTER_LOCK,
+};
+
+static unsigned int ata_acpi_gtf_filter = ATA_ACPI_FILTER_DEFAULT;
+module_param_named(acpi_gtf_filter, ata_acpi_gtf_filter, int, 0644);
+MODULE_PARM_DESC(acpi_gtf_filter, "filter mask for ACPI _GTF commands, set to filter out (0x1=set xfermode, 0x2=lock/freeze lock)");
+
#define NO_PORT_MULT 0xffff
#define SATA_ADR(root, pmp) (((root) << 16) | (pmp))
@@ -41,6 +54,12 @@ static int is_pci_dev(struct device *dev)
return (dev->bus == &pci_bus_type);
}
+static void ata_acpi_clear_gtf(struct ata_device *dev)
+{
+ kfree(dev->gtf_cache);
+ dev->gtf_cache = NULL;
+}
+
/**
* ata_acpi_associate_sata_port - associate SATA port with ACPI objects
* @ap: target SATA port
@@ -94,6 +113,9 @@ static void ata_acpi_associate_ide_port(struct ata_port *ap)
dev->acpi_handle = acpi_get_child(ap->acpi_handle, i);
}
+
+ if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0)
+ ap->pflags |= ATA_PFLAG_INIT_GTM_VALID;
}
static void ata_acpi_handle_hotplug(struct ata_port *ap, struct kobject *kobj,
@@ -188,6 +210,32 @@ void ata_acpi_associate(struct ata_host *host)
}
/**
+ * ata_acpi_dissociate - dissociate ATA host from ACPI objects
+ * @host: target ATA host
+ *
+ * This function is called during driver detach after the whole host
+ * is shut down.
+ *
+ * LOCKING:
+ * EH context.
+ */
+void ata_acpi_dissociate(struct ata_host *host)
+{
+ int i;
+
+ /* Restore initial _GTM values so that driver which attaches
+ * afterward can use them too.
+ */
+ for (i = 0; i < host->n_ports; i++) {
+ struct ata_port *ap = host->ports[i];
+ const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap);
+
+ if (ap->acpi_handle && gtm)
+ ata_acpi_stm(ap, gtm);
+ }
+}
+
+/**
* ata_acpi_gtm - execute _GTM
* @ap: target ATA port
* @gtm: out parameter for _GTM result
@@ -200,7 +248,7 @@ void ata_acpi_associate(struct ata_host *host)
* RETURNS:
* 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure.
*/
-int ata_acpi_gtm(const struct ata_port *ap, struct ata_acpi_gtm *gtm)
+int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm)
{
struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER };
union acpi_object *out_obj;
@@ -259,15 +307,16 @@ EXPORT_SYMBOL_GPL(ata_acpi_gtm);
* RETURNS:
* 0 on success, -ENOENT if _STM doesn't exist, -errno on failure.
*/
-int ata_acpi_stm(const struct ata_port *ap, struct ata_acpi_gtm *stm)
+int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm)
{
acpi_status status;
+ struct ata_acpi_gtm stm_buf = *stm;
struct acpi_object_list input;
union acpi_object in_params[3];
in_params[0].type = ACPI_TYPE_BUFFER;
in_params[0].buffer.length = sizeof(struct ata_acpi_gtm);
- in_params[0].buffer.pointer = (u8 *)stm;
+ in_params[0].buffer.pointer = (u8 *)&stm_buf;
/* Buffers for id may need byteswapping ? */
in_params[1].type = ACPI_TYPE_BUFFER;
in_params[1].buffer.length = 512;
@@ -297,7 +346,6 @@ EXPORT_SYMBOL_GPL(ata_acpi_stm);
* ata_dev_get_GTF - get the drive bootup default taskfile settings
* @dev: target ATA device
* @gtf: output parameter for buffer containing _GTF taskfile arrays
- * @ptr_to_free: pointer which should be freed
*
* This applies to both PATA and SATA drives.
*
@@ -311,11 +359,10 @@ EXPORT_SYMBOL_GPL(ata_acpi_stm);
* EH context.
*
* RETURNS:
- * Number of taskfiles on success, 0 if _GTF doesn't exist or doesn't
- * contain valid data.
+ * Number of taskfiles on success, 0 if _GTF doesn't exist. -EINVAL
+ * if _GTF is invalid.
*/
-static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf,
- void **ptr_to_free)
+static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf)
{
struct ata_port *ap = dev->link->ap;
acpi_status status;
@@ -323,6 +370,12 @@ static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf,
union acpi_object *out_obj;
int rc = 0;
+ /* if _GTF is cached, use the cached value */
+ if (dev->gtf_cache) {
+ out_obj = dev->gtf_cache;
+ goto done;
+ }
+
/* set up output buffer */
output.length = ACPI_ALLOCATE_BUFFER;
output.pointer = NULL; /* ACPI-CA sets this; save/free it later */
@@ -333,12 +386,14 @@ static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf,
/* _GTF has no input parameters */
status = acpi_evaluate_object(dev->acpi_handle, "_GTF", NULL, &output);
+ out_obj = dev->gtf_cache = output.pointer;
if (ACPI_FAILURE(status)) {
if (status != AE_NOT_FOUND) {
ata_dev_printk(dev, KERN_WARNING,
"_GTF evaluation failed (AE 0x%x)\n",
status);
+ rc = -EINVAL;
}
goto out_free;
}
@@ -350,14 +405,15 @@ static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf,
__FUNCTION__,
(unsigned long long)output.length,
output.pointer);
+ rc = -EINVAL;
goto out_free;
}
- out_obj = output.pointer;
if (out_obj->type != ACPI_TYPE_BUFFER) {
ata_dev_printk(dev, KERN_WARNING,
"_GTF unexpected object type 0x%x\n",
out_obj->type);
+ rc = -EINVAL;
goto out_free;
}
@@ -365,21 +421,23 @@ static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf,
ata_dev_printk(dev, KERN_WARNING,
"unexpected _GTF length (%d)\n",
out_obj->buffer.length);
+ rc = -EINVAL;
goto out_free;
}
- *ptr_to_free = out_obj;
- *gtf = (void *)out_obj->buffer.pointer;
+ done:
rc = out_obj->buffer.length / REGS_PER_GTF;
-
- if (ata_msg_probe(ap))
- ata_dev_printk(dev, KERN_DEBUG, "%s: returning "
- "gtf=%p, gtf_count=%d, ptr_to_free=%p\n",
- __FUNCTION__, *gtf, rc, *ptr_to_free);
+ if (gtf) {
+ *gtf = (void *)out_obj->buffer.pointer;
+ if (ata_msg_probe(ap))
+ ata_dev_printk(dev, KERN_DEBUG,
+ "%s: returning gtf=%p, gtf_count=%d\n",
+ __FUNCTION__, *gtf, rc);
+ }
return rc;
out_free:
- kfree(output.pointer);
+ ata_acpi_clear_gtf(dev);
return rc;
}
@@ -393,22 +451,21 @@ static int ata_dev_get_GTF(struct ata_device *dev, struct ata_acpi_gtf **gtf,
int ata_acpi_cbl_80wire(struct ata_port *ap)
{
- struct ata_acpi_gtm gtm;
+ const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap);
int valid = 0;
- /* No _GTM data, no information */
- if (ata_acpi_gtm(ap, &gtm) < 0)
+ if (!gtm)
return 0;
/* Split timing, DMA enabled */
- if ((gtm.flags & 0x11) == 0x11 && gtm.drive[0].dma < 55)
+ if ((gtm->flags & 0x11) == 0x11 && gtm->drive[0].dma < 55)
valid |= 1;
- if ((gtm.flags & 0x14) == 0x14 && gtm.drive[1].dma < 55)
+ if ((gtm->flags & 0x14) == 0x14 && gtm->drive[1].dma < 55)
valid |= 2;
/* Shared timing, DMA enabled */
- if ((gtm.flags & 0x11) == 0x01 && gtm.drive[0].dma < 55)
+ if ((gtm->flags & 0x11) == 0x01 && gtm->drive[0].dma < 55)
valid |= 1;
- if ((gtm.flags & 0x14) == 0x04 && gtm.drive[0].dma < 55)
+ if ((gtm->flags & 0x14) == 0x04 && gtm->drive[0].dma < 55)
valid |= 2;
/* Drive check */
@@ -421,8 +478,62 @@ int ata_acpi_cbl_80wire(struct ata_port *ap)
EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire);
+static void ata_acpi_gtf_to_tf(struct ata_device *dev,
+ const struct ata_acpi_gtf *gtf,
+ struct ata_taskfile *tf)
+{
+ ata_tf_init(dev, tf);
+
+ tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
+ tf->protocol = ATA_PROT_NODATA;
+ tf->feature = gtf->tf[0]; /* 0x1f1 */
+ tf->nsect = gtf->tf[1]; /* 0x1f2 */
+ tf->lbal = gtf->tf[2]; /* 0x1f3 */
+ tf->lbam = gtf->tf[3]; /* 0x1f4 */
+ tf->lbah = gtf->tf[4]; /* 0x1f5 */
+ tf->device = gtf->tf[5]; /* 0x1f6 */
+ tf->command = gtf->tf[6]; /* 0x1f7 */
+}
+
+static int ata_acpi_filter_tf(const struct ata_taskfile *tf,
+ const struct ata_taskfile *ptf)
+{
+ if (ata_acpi_gtf_filter & ATA_ACPI_FILTER_SETXFER) {
+ /* libata doesn't use ACPI to configure transfer mode.
+ * It will only confuse device configuration. Skip.
+ */
+ if (tf->command == ATA_CMD_SET_FEATURES &&
+ tf->feature == SETFEATURES_XFER)
+ return 1;
+ }
+
+ if (ata_acpi_gtf_filter & ATA_ACPI_FILTER_LOCK) {
+ /* BIOS writers, sorry but we don't wanna lock
+ * features unless the user explicitly said so.
+ */
+
+ /* DEVICE CONFIGURATION FREEZE LOCK */
+ if (tf->command == ATA_CMD_CONF_OVERLAY &&
+ tf->feature == ATA_DCO_FREEZE_LOCK)
+ return 1;
+
+ /* SECURITY FREEZE LOCK */
+ if (tf->command == ATA_CMD_SEC_FREEZE_LOCK)
+ return 1;
+
+ /* SET MAX LOCK and SET MAX FREEZE LOCK */
+ if ((!ptf || ptf->command != ATA_CMD_READ_NATIVE_MAX) &&
+ tf->command == ATA_CMD_SET_MAX &&
+ (tf->feature == ATA_SET_MAX_LOCK ||
+ tf->feature == ATA_SET_MAX_FREEZE_LOCK))
+ return 1;
+ }
+
+ return 0;
+}
+
/**
- * taskfile_load_raw - send taskfile registers to host controller
+ * ata_acpi_run_tf - send taskfile registers to host controller
* @dev: target ATA device
* @gtf: raw ATA taskfile register set (0x1f1 - 0x1f7)
*
@@ -441,56 +552,77 @@ EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire);
* EH context.
*
* RETURNS:
- * 0 on success, -errno on failure.
+ * 1 if command is executed successfully. 0 if ignored, rejected or
+ * filtered out, -errno on other errors.
*/
-static int taskfile_load_raw(struct ata_device *dev,
- const struct ata_acpi_gtf *gtf)
+static int ata_acpi_run_tf(struct ata_device *dev,
+ const struct ata_acpi_gtf *gtf,
+ const struct ata_acpi_gtf *prev_gtf)
{
- struct ata_port *ap = dev->link->ap;
- struct ata_taskfile tf, rtf;
+ struct ata_taskfile *pptf = NULL;
+ struct ata_taskfile tf, ptf, rtf;
unsigned int err_mask;
+ const char *level;
+ char msg[60];
+ int rc;
if ((gtf->tf[0] == 0) && (gtf->tf[1] == 0) && (gtf->tf[2] == 0)
&& (gtf->tf[3] == 0) && (gtf->tf[4] == 0) && (gtf->tf[5] == 0)
&& (gtf->tf[6] == 0))
return 0;
- ata_tf_init(dev, &tf);
+ ata_acpi_gtf_to_tf(dev, gtf, &tf);
+ if (prev_gtf) {
+ ata_acpi_gtf_to_tf(dev, prev_gtf, &ptf);
+ pptf = &ptf;
+ }
- /* convert gtf to tf */
- tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; /* TBD */
- tf.protocol = ATA_PROT_NODATA;
- tf.feature = gtf->tf[0]; /* 0x1f1 */
- tf.nsect = gtf->tf[1]; /* 0x1f2 */
- tf.lbal = gtf->tf[2]; /* 0x1f3 */
- tf.lbam = gtf->tf[3]; /* 0x1f4 */
- tf.lbah = gtf->tf[4]; /* 0x1f5 */
- tf.device = gtf->tf[5]; /* 0x1f6 */
- tf.command = gtf->tf[6]; /* 0x1f7 */
+ if (!ata_acpi_filter_tf(&tf, pptf)) {
+ rtf = tf;
+ err_mask = ata_exec_internal(dev, &rtf, NULL,
+ DMA_NONE, NULL, 0, 0);
- if (ata_msg_probe(ap))
- ata_dev_printk(dev, KERN_DEBUG, "executing ACPI cmd "
- "%02x/%02x:%02x:%02x:%02x:%02x:%02x\n",
- tf.command, tf.feature, tf.nsect,
- tf.lbal, tf.lbam, tf.lbah, tf.device);
-
- rtf = tf;
- err_mask = ata_exec_internal(dev, &rtf, NULL, DMA_NONE, NULL, 0, 0);
- if (err_mask) {
- ata_dev_printk(dev, KERN_ERR,
- "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x failed "
- "(Emask=0x%x Stat=0x%02x Err=0x%02x)\n",
- tf.command, tf.feature, tf.nsect, tf.lbal, tf.lbam,
- tf.lbah, tf.device, err_mask, rtf.command, rtf.feature);
- return -EIO;
+ switch (err_mask) {
+ case 0:
+ level = KERN_DEBUG;
+ snprintf(msg, sizeof(msg), "succeeded");
+ rc = 1;
+ break;
+
+ case AC_ERR_DEV:
+ level = KERN_INFO;
+ snprintf(msg, sizeof(msg),
+ "rejected by device (Stat=0x%02x Err=0x%02x)",
+ rtf.command, rtf.feature);
+ rc = 0;
+ break;
+
+ default:
+ level = KERN_ERR;
+ snprintf(msg, sizeof(msg),
+ "failed (Emask=0x%x Stat=0x%02x Err=0x%02x)",
+ err_mask, rtf.command, rtf.feature);
+ rc = -EIO;
+ break;
+ }
+ } else {
+ level = KERN_INFO;
+ snprintf(msg, sizeof(msg), "filtered out");
+ rc = 0;
}
- return 0;
+ ata_dev_printk(dev, level,
+ "ACPI cmd %02x/%02x:%02x:%02x:%02x:%02x:%02x %s\n",
+ tf.command, tf.feature, tf.nsect, tf.lbal,
+ tf.lbam, tf.lbah, tf.device, msg);
+
+ return rc;
}
/**
* ata_acpi_exec_tfs - get then write drive taskfile settings
* @dev: target ATA device
+ * @nr_executed: out paramter for the number of executed commands
*
* Evaluate _GTF and excute returned taskfiles.
*
@@ -498,35 +630,36 @@ static int taskfile_load_raw(struct ata_device *dev,
* EH context.
*
* RETURNS:
- * Number of executed taskfiles on success, 0 if _GTF doesn't exist or
- * doesn't contain valid data. -errno on other errors.
+ * Number of executed taskfiles on success, 0 if _GTF doesn't exist.
+ * -errno on other errors.
*/
-static int ata_acpi_exec_tfs(struct ata_device *dev)
+static int ata_acpi_exec_tfs(struct ata_device *dev, int *nr_executed)
{
- struct ata_acpi_gtf *gtf = NULL;
- void *ptr_to_free = NULL;
+ struct ata_acpi_gtf *gtf = NULL, *pgtf = NULL;
int gtf_count, i, rc;
/* get taskfiles */
- gtf_count = ata_dev_get_GTF(dev, &gtf, &ptr_to_free);
+ rc = ata_dev_get_GTF(dev, &gtf);
+ if (rc < 0)
+ return rc;
+ gtf_count = rc;
/* execute them */
- for (i = 0, rc = 0; i < gtf_count; i++) {
- int tmp;
-
- /* ACPI errors are eventually ignored. Run till the
- * end even after errors.
- */
- tmp = taskfile_load_raw(dev, gtf++);
- if (!rc)
- rc = tmp;
+ for (i = 0; i < gtf_count; i++, gtf++) {
+ rc = ata_acpi_run_tf(dev, gtf, pgtf);
+ if (rc < 0)
+ break;
+ if (rc) {
+ (*nr_executed)++;
+ pgtf = gtf;
+ }
}
- kfree(ptr_to_free);
+ ata_acpi_clear_gtf(dev);
- if (rc == 0)
- return gtf_count;
- return rc;
+ if (rc < 0)
+ return rc;
+ return 0;
}
/**
@@ -596,27 +729,8 @@ static int ata_acpi_push_id(struct ata_device *dev)
*/
int ata_acpi_on_suspend(struct ata_port *ap)
{
- unsigned long flags;
- int rc;
-
- /* proceed iff per-port acpi_handle is valid */
- if (!ap->acpi_handle)
- return 0;
- BUG_ON(ap->flags & ATA_FLAG_ACPI_SATA);
-
- /* store timing parameters */
- rc = ata_acpi_gtm(ap, &ap->acpi_gtm);
-
- spin_lock_irqsave(ap->lock, flags);
- if (rc == 0)
- ap->pflags |= ATA_PFLAG_GTM_VALID;
- else
- ap->pflags &= ~ATA_PFLAG_GTM_VALID;
- spin_unlock_irqrestore(ap->lock, flags);
-
- if (rc == -ENOENT)
- rc = 0;
- return rc;
+ /* nada */
+ return 0;
}
/**
@@ -631,18 +745,34 @@ int ata_acpi_on_suspend(struct ata_port *ap)
*/
void ata_acpi_on_resume(struct ata_port *ap)
{
+ const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap);
struct ata_device *dev;
- if (ap->acpi_handle && (ap->pflags & ATA_PFLAG_GTM_VALID)) {
- BUG_ON(ap->flags & ATA_FLAG_ACPI_SATA);
+ if (ap->acpi_handle && gtm) {
+ /* _GTM valid */
/* restore timing parameters */
- ata_acpi_stm(ap, &ap->acpi_gtm);
- }
+ ata_acpi_stm(ap, gtm);
- /* schedule _GTF */
- ata_link_for_each_dev(dev, &ap->link)
- dev->flags |= ATA_DFLAG_ACPI_PENDING;
+ /* _GTF should immediately follow _STM so that it can
+ * use values set by _STM. Cache _GTF result and
+ * schedule _GTF.
+ */
+ ata_link_for_each_dev(dev, &ap->link) {
+ ata_acpi_clear_gtf(dev);
+ if (ata_dev_get_GTF(dev, NULL) >= 0)
+ dev->flags |= ATA_DFLAG_ACPI_PENDING;
+ }
+ } else {
+ /* SATA _GTF needs to be evaulated after _SDD and
+ * there's no reason to evaluate IDE _GTF early
+ * without _STM. Clear cache and schedule _GTF.
+ */
+ ata_link_for_each_dev(dev, &ap->link) {
+ ata_acpi_clear_gtf(dev);
+ dev->flags |= ATA_DFLAG_ACPI_PENDING;
+ }
+ }
}
/**
@@ -664,6 +794,7 @@ int ata_acpi_on_devcfg(struct ata_device *dev)
struct ata_port *ap = dev->link->ap;
struct ata_eh_context *ehc = &ap->link.eh_context;
int acpi_sata = ap->flags & ATA_FLAG_ACPI_SATA;
+ int nr_executed = 0;
int rc;
if (!dev->acpi_handle)
@@ -682,14 +813,14 @@ int ata_acpi_on_devcfg(struct ata_device *dev)
}
/* do _GTF */
- rc = ata_acpi_exec_tfs(dev);
- if (rc < 0)
+ rc = ata_acpi_exec_tfs(dev, &nr_executed);
+ if (rc)
goto acpi_err;
dev->flags &= ~ATA_DFLAG_ACPI_PENDING;
/* refresh IDENTIFY page if any _GTF command has been executed */
- if (rc > 0) {
+ if (nr_executed) {
rc = ata_dev_reread_id(dev, 0);
if (rc < 0) {
ata_dev_printk(dev, KERN_ERR, "failed to IDENTIFY "
@@ -701,17 +832,39 @@ int ata_acpi_on_devcfg(struct ata_device *dev)
return 0;
acpi_err:
- /* let EH retry on the first failure, disable ACPI on the second */
- if (dev->flags & ATA_DFLAG_ACPI_FAILED) {
- ata_dev_printk(dev, KERN_WARNING, "ACPI on devcfg failed the "
- "second time, disabling (errno=%d)\n", rc);
-
- dev->acpi_handle = NULL;
+ /* ignore evaluation failure if we can continue safely */
+ if (rc == -EINVAL && !nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN))
+ return 0;
- /* if port is working, request IDENTIFY reload and continue */
- if (!(ap->pflags & ATA_PFLAG_FROZEN))
- rc = 1;
+ /* fail and let EH retry once more for unknown IO errors */
+ if (!(dev->flags & ATA_DFLAG_ACPI_FAILED)) {
+ dev->flags |= ATA_DFLAG_ACPI_FAILED;
+ return rc;
}
- dev->flags |= ATA_DFLAG_ACPI_FAILED;
+
+ ata_dev_printk(dev, KERN_WARNING,
+ "ACPI: failed the second time, disabled\n");
+ dev->acpi_handle = NULL;
+
+ /* We can safely continue if no _GTF command has been executed
+ * and port is not frozen.
+ */
+ if (!nr_executed && !(ap->pflags & ATA_PFLAG_FROZEN))
+ return 0;
+
return rc;
}
+
+/**
+ * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled
+ * @dev: target ATA device
+ *
+ * This function is called when @dev is about to be disabled.
+ *
+ * LOCKING:
+ * EH context.
+ */
+void ata_acpi_on_disable(struct ata_device *dev)
+{
+ ata_acpi_clear_gtf(dev);
+}