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Subject[PATCH 1/3] scsi: libsas: Refactor sas_ata_hard_reset()
Date
Create function sas_ata_wait_after_reset() from sas_ata_hard_reset() as
some LLDDs may want to check for a remote ATA phy is up after reset.

Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Xiang Chen <chenxiang66@hisilicon.com>
Tested-by: Yihang Li <liyihang6@hisilicon.com>
---
drivers/scsi/libsas/sas_ata.c | 41 +++++++++++++++++++++++------------
include/scsi/sas_ata.h | 7 ++++++
2 files changed, 34 insertions(+), 14 deletions(-)

diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c
index d34c82e24d9a..d35c9296f738 100644
--- a/drivers/scsi/libsas/sas_ata.c
+++ b/drivers/scsi/libsas/sas_ata.c
@@ -358,22 +358,14 @@ static int sas_ata_printk(const char *level, const struct domain_device *ddev,
return r;
}

-static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class,
- unsigned long deadline)
+int sas_ata_wait_after_reset(struct domain_device *dev, unsigned long deadline)
{
- int ret = 0, res;
- struct sas_phy *phy;
- struct ata_port *ap = link->ap;
+ struct sata_device *sata_dev = &dev->sata_dev;
int (*check_ready)(struct ata_link *link);
- struct domain_device *dev = ap->private_data;
- struct sas_internal *i = dev_to_sas_internal(dev);
-
- res = i->dft->lldd_I_T_nexus_reset(dev);
- if (res == -ENODEV)
- return res;
-
- if (res != TMF_RESP_FUNC_COMPLETE)
- sas_ata_printk(KERN_DEBUG, dev, "Unable to reset ata device?\n");
+ struct ata_port *ap = sata_dev->ap;
+ struct ata_link *link = &ap->link;
+ struct sas_phy *phy;
+ int ret;

phy = sas_get_local_phy(dev);
if (scsi_is_sas_phy_local(phy))
@@ -386,6 +378,27 @@ static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class,
if (ret && ret != -EAGAIN)
sas_ata_printk(KERN_ERR, dev, "reset failed (errno=%d)\n", ret);

+ return ret;
+}
+EXPORT_SYMBOL_GPL(sas_ata_wait_after_reset);
+
+static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class,
+ unsigned long deadline)
+{
+ struct ata_port *ap = link->ap;
+ struct domain_device *dev = ap->private_data;
+ struct sas_internal *i = dev_to_sas_internal(dev);
+ int ret;
+
+ ret = i->dft->lldd_I_T_nexus_reset(dev);
+ if (ret == -ENODEV)
+ return ret;
+
+ if (ret != TMF_RESP_FUNC_COMPLETE)
+ sas_ata_printk(KERN_DEBUG, dev, "Unable to reset ata device?\n");
+
+ ret = sas_ata_wait_after_reset(dev, deadline);
+
*class = dev->sata_dev.class;

ap->cbl = ATA_CBL_SATA;
diff --git a/include/scsi/sas_ata.h b/include/scsi/sas_ata.h
index d47dea70855d..a1df4f9d57a3 100644
--- a/include/scsi/sas_ata.h
+++ b/include/scsi/sas_ata.h
@@ -34,6 +34,7 @@ void sas_resume_sata(struct asd_sas_port *port);
void sas_ata_end_eh(struct ata_port *ap);
int sas_execute_ata_cmd(struct domain_device *device, u8 *fis,
int force_phy_id);
+int sas_ata_wait_after_reset(struct domain_device *dev, unsigned long deadline);
#else


@@ -91,6 +92,12 @@ static inline int sas_execute_ata_cmd(struct domain_device *device, u8 *fis,
{
return 0;
}
+
+static inline int sas_ata_wait_after_reset(struct domain_device *dev,
+ unsigned long deadline)
+{
+ return -ETIMEDOUT;
+}
#endif

#endif /* _SAS_ATA_H_ */
--
2.26.2
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