Currently, SATA softresets should do link onlineness check before
actually performing SRST protocol but it doesn't really belong to
softreset.
This patch moves onlineness check in softreset to ata_eh_reset() and
ata_eh_followup_srst_needed() to clean up code and help future sata_mv
changes which need clear separation between SCR and TF accesses.
sata_fsl is peculiar in that its softreset really isn't softreset but
combination of hardreset and softreset. This patch adds dummy private
->prereset to keep the current behavior but the driver really should
implement separate hard and soft resets and return -EAGAIN from
hardreset if it should be follwed by softreset.
Signed-off-by: Tejun Heo <htejun@xxxxxxxxx>
---
Jeff, this and the previous patch are on top of the modularize
patchset. Mark, does this look good enough? Here's git tree
containing everything.
http://git.kernel.org/?p=linux/kernel/git/tj/libata-dev.git;a=shortlog;h=for-mlord
git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata-dev.git for-mlord
Thanks.
drivers/ata/ahci.c | 6 ------
drivers/ata/libata-core.c | 4 ++++
drivers/ata/libata-eh.c | 2 +-
drivers/ata/libata-sff.c | 6 ------
drivers/ata/pata_bf54x.c | 6 ------
drivers/ata/pata_scc.c | 6 ------
drivers/ata/sata_fsl.c | 10 ++++++++++
drivers/ata/sata_sil24.c | 7 -------
8 files changed, 15 insertions(+), 32 deletions(-)
Index: work/drivers/ata/ahci.c
===================================================================
--- work.orig/drivers/ata/ahci.c
+++ work/drivers/ata/ahci.c
@@ -1273,12 +1273,6 @@ static int ahci_softreset(struct ata_lin
DPRINTK("ENTER\n");
- if (ata_link_offline(link)) {
- DPRINTK("PHY reports no device\n");
- *class = ATA_DEV_NONE;
- return 0;
- }
-
/* prepare for SRST (AHCI-1.1 10.4.1) */
rc = ahci_kick_engine(ap, 1);
if (rc && rc != -EOPNOTSUPP)
Index: work/drivers/ata/libata-core.c
===================================================================
--- work.orig/drivers/ata/libata-core.c
+++ work/drivers/ata/libata-core.c
@@ -3541,6 +3541,10 @@ int ata_std_prereset(struct ata_link *li
"link for reset (errno=%d)\n", rc);
}
+ /* no point in trying softreset on offline link */
+ if (ata_link_offline(link))
+ ehc->i.action &= ~ATA_EH_SOFTRESET;
+
return 0;
}
Index: work/drivers/ata/libata-eh.c
===================================================================
--- work.orig/drivers/ata/libata-eh.c
+++ work/drivers/ata/libata-eh.c
@@ -2065,7 +2065,7 @@ static int ata_eh_followup_srst_needed(s
int rc, int classify,
const unsigned int *classes)
{
- if (link->flags & ATA_LFLAG_NO_SRST)
+ if ((link->flags & ATA_LFLAG_NO_SRST) || ata_link_offline(link))
return 0;
if (rc == -EAGAIN) {
if (classify)
Index: work/drivers/ata/libata-sff.c
===================================================================
--- work.orig/drivers/ata/libata-sff.c
+++ work/drivers/ata/libata-sff.c
@@ -1889,11 +1889,6 @@ int ata_sff_softreset(struct ata_link *l
DPRINTK("ENTER\n");
- if (ata_link_offline(link)) {
- classes[0] = ATA_DEV_NONE;
- goto out;
- }
-
/* determine if device 0/1 are present */
if (ata_devchk(ap, 0))
devmask |= (1 << 0);
@@ -1919,7 +1914,6 @@ int ata_sff_softreset(struct ata_link *l
classes[1] = ata_sff_dev_classify(&link->device[1],
devmask & (1 << 1), &err);
- out:
DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
return 0;
}
Index: work/drivers/ata/pata_bf54x.c
===================================================================
--- work.orig/drivers/ata/pata_bf54x.c
+++ work/drivers/ata/pata_bf54x.c
@@ -1103,11 +1103,6 @@ static int bfin_softreset(struct ata_lin
unsigned int devmask = 0, err_mask;
u8 err;
- if (ata_link_offline(link)) {
- classes[0] = ATA_DEV_NONE;
- goto out;
- }
-
/* determine if device 0/1 are present */
if (bfin_devchk(ap, 0))
devmask |= (1 << 0);
@@ -1132,7 +1127,6 @@ static int bfin_softreset(struct ata_lin
classes[1] = ata_sff_dev_classify(&ap->link.device[1],
devmask & (1 << 1), &err);
- out:
return 0;
}
Index: work/drivers/ata/pata_scc.c
===================================================================
--- work.orig/drivers/ata/pata_scc.c
+++ work/drivers/ata/pata_scc.c
@@ -615,11 +615,6 @@ static int scc_softreset(struct ata_link
DPRINTK("ENTER\n");
- if (ata_link_offline(link)) {
- classes[0] = ATA_DEV_NONE;
- goto out;
- }
-
/* determine if device 0/1 are present */
if (scc_devchk(ap, 0))
devmask |= (1 << 0);
@@ -645,7 +640,6 @@ static int scc_softreset(struct ata_link
classes[1] = ata_sff_dev_classify(&ap->link.device[1],
devmask & (1 << 1), &err);
- out:
DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
return 0;
}
Index: work/drivers/ata/sata_fsl.c
===================================================================
--- work.orig/drivers/ata/sata_fsl.c
+++ work/drivers/ata/sata_fsl.c
@@ -678,6 +678,15 @@ static unsigned int sata_fsl_dev_classif
return ata_dev_classify(&tf);
}
+static int sata_fsl_prereset(struct ata_linke *link, unsigned long deadline)
+{
+ /* FIXME: Never skip softreset, sata_fsl_softreset() is
+ * combination of soft and hard resets. sata_fsl_softreset()
+ * needs to be splitted into soft and hard resets.
+ */
+ return 0;
+}
+
static int sata_fsl_softreset(struct ata_link *link, unsigned int *class,
unsigned long deadline)
{
@@ -1157,6 +1166,7 @@ static const struct ata_port_operations
.freeze = sata_fsl_freeze,
.thaw = sata_fsl_thaw,
+ .prereset = sata_fsl_prereset,
.softreset = sata_fsl_softreset,
.post_internal_cmd = sata_fsl_post_internal_cmd,
Index: work/drivers/ata/sata_sil24.c
===================================================================
--- work.orig/drivers/ata/sata_sil24.c
+++ work/drivers/ata/sata_sil24.c
@@ -663,12 +663,6 @@ static int sil24_softreset(struct ata_li
DPRINTK("ENTER\n");
- if (ata_link_offline(link)) {
- DPRINTK("PHY reports no device\n");
- *class = ATA_DEV_NONE;
- goto out;
- }
-
/* put the port into known state */
if (sil24_init_port(ap)) {
reason = "port not ready";
@@ -693,7 +687,6 @@ static int sil24_softreset(struct ata_li
sil24_read_tf(ap, 0, &tf);
*class = ata_dev_classify(&tf);
- out:
DPRINTK("EXIT, class=%u\n", *class);
return 0;
--
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