diff options
| author | Tejun Heo <htejun@gmail.com> | 2007-09-23 13:14:12 +0900 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-10-12 14:55:40 -0400 |
| commit | 422c9daa8b5bea09f3393b11a106afd68850b39b (patch) | |
| tree | 76a4d15d77a26c049ca80ae850473b83df47d332 /drivers/ata | |
| parent | e0a7175263db4a226558883a51a88a5d2bc5d9fe (diff) | |
| download | lwn-422c9daa8b5bea09f3393b11a106afd68850b39b.tar.gz lwn-422c9daa8b5bea09f3393b11a106afd68850b39b.zip | |
libata-pmp-prep: add @new_class to ata_dev_revalidate()
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 <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/ata')
| -rw-r--r-- | drivers/ata/libata-core.c | 15 | ||||
| -rw-r--r-- | drivers/ata/libata-eh.c | 3 | ||||
| -rw-r--r-- | 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 1daea1caf3e5..c046c5e1e5db 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -2846,7 +2846,7 @@ 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; @@ -3750,6 +3750,7 @@ 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 @@ -3761,7 +3762,8 @@ 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; @@ -3769,6 +3771,15 @@ 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 daa2f74f73c8..eb087bbc4771 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -2104,7 +2104,8 @@ 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 e45f6d5542d5..d4d369908c0f 100644 --- a/drivers/ata/libata.h +++ b/drivers/ata/libata.h @@ -78,7 +78,8 @@ 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); |