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path: root/drivers/s390/cio/chsc.c
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Diffstat (limited to 'drivers/s390/cio/chsc.c')
-rw-r--r--drivers/s390/cio/chsc.c110
1 files changed, 50 insertions, 60 deletions
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 2d78f0f4a40..cbab8d2ce5c 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -183,7 +183,7 @@ css_get_ssd_info(struct subchannel *sch)
page = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
if (!page)
return -ENOMEM;
- spin_lock_irq(&sch->lock);
+ spin_lock_irq(sch->lock);
ret = chsc_get_sch_desc_irq(sch, page);
if (ret) {
static int cio_chsc_err_msg;
@@ -197,7 +197,7 @@ css_get_ssd_info(struct subchannel *sch)
cio_chsc_err_msg = 1;
}
}
- spin_unlock_irq(&sch->lock);
+ spin_unlock_irq(sch->lock);
free_page((unsigned long)page);
if (!ret) {
int j, chpid, mask;
@@ -233,7 +233,7 @@ s390_subchannel_remove_chpid(struct device *dev, void *data)
if (j >= 8)
return 0;
- spin_lock_irq(&sch->lock);
+ spin_lock_irq(sch->lock);
stsch(sch->schid, &schib);
if (!schib.pmcw.dnv)
@@ -251,6 +251,8 @@ s390_subchannel_remove_chpid(struct device *dev, void *data)
cc = cio_clear(sch);
if (cc == -ENODEV)
goto out_unreg;
+ /* Request retry of internal operation. */
+ device_set_intretry(sch);
/* Call handler. */
if (sch->driver && sch->driver->termination)
sch->driver->termination(&sch->dev);
@@ -263,10 +265,10 @@ s390_subchannel_remove_chpid(struct device *dev, void *data)
else if (sch->lpm == mask)
goto out_unreg;
out_unlock:
- spin_unlock_irq(&sch->lock);
+ spin_unlock_irq(sch->lock);
return 0;
out_unreg:
- spin_unlock_irq(&sch->lock);
+ spin_unlock_irq(sch->lock);
sch->lpm = 0;
if (css_enqueue_subchannel_slow(sch->schid)) {
css_clear_subchannel_slow_list();
@@ -376,12 +378,12 @@ __s390_process_res_acc(struct subchannel_id schid, void *data)
/* Check if a subchannel is newly available. */
return s390_process_res_acc_new_sch(schid);
- spin_lock_irq(&sch->lock);
+ spin_lock_irq(sch->lock);
chp_mask = s390_process_res_acc_sch(res_data, sch);
if (chp_mask == 0) {
- spin_unlock_irq(&sch->lock);
+ spin_unlock_irq(sch->lock);
put_device(&sch->dev);
return 0;
}
@@ -395,7 +397,7 @@ __s390_process_res_acc(struct subchannel_id schid, void *data)
else if (sch->driver && sch->driver->verify)
sch->driver->verify(&sch->dev);
- spin_unlock_irq(&sch->lock);
+ spin_unlock_irq(sch->lock);
put_device(&sch->dev);
return 0;
}
@@ -633,21 +635,21 @@ __chp_add(struct subchannel_id schid, void *data)
if (!sch)
/* Check if the subchannel is now available. */
return __chp_add_new_sch(schid);
- spin_lock_irq(&sch->lock);
+ spin_lock_irq(sch->lock);
for (i=0; i<8; i++) {
mask = 0x80 >> i;
if ((sch->schib.pmcw.pim & mask) &&
(sch->schib.pmcw.chpid[i] == chp->id)) {
if (stsch(sch->schid, &sch->schib) != 0) {
/* Endgame. */
- spin_unlock_irq(&sch->lock);
+ spin_unlock_irq(sch->lock);
return -ENXIO;
}
break;
}
}
if (i==8) {
- spin_unlock_irq(&sch->lock);
+ spin_unlock_irq(sch->lock);
return 0;
}
sch->lpm = ((sch->schib.pmcw.pim &
@@ -658,7 +660,7 @@ __chp_add(struct subchannel_id schid, void *data)
if (sch->driver && sch->driver->verify)
sch->driver->verify(&sch->dev);
- spin_unlock_irq(&sch->lock);
+ spin_unlock_irq(sch->lock);
put_device(&sch->dev);
return 0;
}
@@ -711,9 +713,6 @@ static inline int check_for_io_on_path(struct subchannel *sch, int index)
{
int cc;
- if (!device_is_online(sch))
- /* cio could be doing I/O. */
- return 0;
cc = stsch(sch->schid, &sch->schib);
if (cc)
return 0;
@@ -722,6 +721,26 @@ static inline int check_for_io_on_path(struct subchannel *sch, int index)
return 0;
}
+static void terminate_internal_io(struct subchannel *sch)
+{
+ if (cio_clear(sch)) {
+ /* Recheck device in case clear failed. */
+ sch->lpm = 0;
+ if (device_trigger_verify(sch) != 0) {
+ if(css_enqueue_subchannel_slow(sch->schid)) {
+ css_clear_subchannel_slow_list();
+ need_rescan = 1;
+ }
+ }
+ return;
+ }
+ /* Request retry of internal operation. */
+ device_set_intretry(sch);
+ /* Call handler. */
+ if (sch->driver && sch->driver->termination)
+ sch->driver->termination(&sch->dev);
+}
+
static inline void
__s390_subchannel_vary_chpid(struct subchannel *sch, __u8 chpid, int on)
{
@@ -731,7 +750,7 @@ __s390_subchannel_vary_chpid(struct subchannel *sch, __u8 chpid, int on)
if (!sch->ssd_info.valid)
return;
- spin_lock_irqsave(&sch->lock, flags);
+ spin_lock_irqsave(sch->lock, flags);
old_lpm = sch->lpm;
for (chp = 0; chp < 8; chp++) {
if (sch->ssd_info.chpid[chp] != chpid)
@@ -744,23 +763,29 @@ __s390_subchannel_vary_chpid(struct subchannel *sch, __u8 chpid, int on)
device_trigger_reprobe(sch);
else if (sch->driver && sch->driver->verify)
sch->driver->verify(&sch->dev);
- } else {
- sch->opm &= ~(0x80 >> chp);
- sch->lpm &= ~(0x80 >> chp);
- if (check_for_io_on_path(sch, chp))
+ break;
+ }
+ sch->opm &= ~(0x80 >> chp);
+ sch->lpm &= ~(0x80 >> chp);
+ if (check_for_io_on_path(sch, chp)) {
+ if (device_is_online(sch))
/* Path verification is done after killing. */
device_kill_io(sch);
- else if (!sch->lpm) {
+ else
+ /* Kill and retry internal I/O. */
+ terminate_internal_io(sch);
+ } else if (!sch->lpm) {
+ if (device_trigger_verify(sch) != 0) {
if (css_enqueue_subchannel_slow(sch->schid)) {
css_clear_subchannel_slow_list();
need_rescan = 1;
}
- } else if (sch->driver && sch->driver->verify)
- sch->driver->verify(&sch->dev);
- }
+ }
+ } else if (sch->driver && sch->driver->verify)
+ sch->driver->verify(&sch->dev);
break;
}
- spin_unlock_irqrestore(&sch->lock, flags);
+ spin_unlock_irqrestore(sch->lock, flags);
}
static int
@@ -1465,41 +1490,6 @@ chsc_get_chp_desc(struct subchannel *sch, int chp_no)
return desc;
}
-static int reset_channel_path(struct channel_path *chp)
-{
- int cc;
-
- cc = rchp(chp->id);
- switch (cc) {
- case 0:
- return 0;
- case 2:
- return -EBUSY;
- default:
- return -ENODEV;
- }
-}
-
-static void reset_channel_paths_css(struct channel_subsystem *css)
-{
- int i;
-
- for (i = 0; i <= __MAX_CHPID; i++) {
- if (css->chps[i])
- reset_channel_path(css->chps[i]);
- }
-}
-
-void cio_reset_channel_paths(void)
-{
- int i;
-
- for (i = 0; i <= __MAX_CSSID; i++) {
- if (css[i] && css[i]->valid)
- reset_channel_paths_css(css[i]);
- }
-}
-
static int __init
chsc_alloc_sei_area(void)
{
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-01 17:14:29 +0000