Consider newly found class code while revalidating. PMP resetting
always results in valid class code and issuing PMP commands to
ATA/ATAPI device isn't very attractive. Add @new_class to
ata_dev_revalidate() and check class code for revalidation.
Signed-off-by: Tejun Heo <[EMAIL PROTECTED]>
---
drivers/ata/libata-core.c | 15 +++++++++++++--
drivers/ata/libata-eh.c | 3 ++-
drivers/ata/libata.h | 3 ++-
3 files changed, 17 insertions(+), 4 deletions(-)
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index f4863b6..d366ac2 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2790,7 +2790,7 @@ static int ata_dev_set_mode(struct ata_device *dev)
}
ehc->i.flags |= ATA_EHI_POST_SETMODE;
- rc = ata_dev_revalidate(dev, 0);
+ rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
if (rc)
return rc;
@@ -3699,6 +3699,7 @@ int ata_dev_reread_id(struct ata_device *dev, unsigned
int readid_flags)
/**
* ata_dev_revalidate - Revalidate ATA device
* @dev: device to revalidate
+ * @new_class: new class code
* @readid_flags: read ID flags
*
* Re-read IDENTIFY page, make sure @dev is still attached to the
@@ -3710,7 +3711,8 @@ int ata_dev_reread_id(struct ata_device *dev, unsigned
int readid_flags)
* RETURNS:
* 0 on success, negative errno otherwise
*/
-int ata_dev_revalidate(struct ata_device *dev, unsigned int readid_flags)
+int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
+ unsigned int readid_flags)
{
u64 n_sectors = dev->n_sectors;
int rc;
@@ -3718,6 +3720,15 @@ int ata_dev_revalidate(struct ata_device *dev, unsigned
int readid_flags)
if (!ata_dev_enabled(dev))
return -ENODEV;
+ /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
+ if (ata_class_enabled(new_class) &&
+ new_class != ATA_DEV_ATA && new_class != ATA_DEV_ATAPI) {
+ ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n",
+ dev->class, new_class);
+ rc = -ENODEV;
+ goto fail;
+ }
+
/* re-read ID */
rc = ata_dev_reread_id(dev, readid_flags);
if (rc)
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index eb51b76..7e8ec17 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1966,7 +1966,8 @@ static int ata_eh_revalidate_and_attach(struct ata_link
*link,
}
ata_eh_about_to_do(link, dev, ATA_EH_REVALIDATE);
- rc = ata_dev_revalidate(dev, readid_flags);
+ rc = ata_dev_revalidate(dev, ehc->classes[dev->devno],
+ readid_flags);
if (rc)
goto err;
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index 6d85ede..4153817 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -76,7 +76,8 @@ extern unsigned int ata_do_simple_cmd(struct ata_device *dev,
u8 cmd);
extern int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
unsigned int flags, u16 *id);
extern int ata_dev_reread_id(struct ata_device *dev, unsigned int
readid_flags);
-extern int ata_dev_revalidate(struct ata_device *dev, unsigned int
readid_flags);
+extern int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
+ unsigned int readid_flags);
extern int ata_dev_configure(struct ata_device *dev);
extern int sata_down_spd_limit(struct ata_link *link);
extern int sata_set_spd_needed(struct ata_link *link);
--
1.5.0.3
-
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