[S390] cio: notify drivers of channel path events
This patch adds a notification mechanism to inform ccw drivers
about changes to channel paths, which occured while the device
is online.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/cio/device_pgid.c b/drivers/s390/cio/device_pgid.c
index 82a5ad0..07a4fd2 100644
--- a/drivers/s390/cio/device_pgid.c
+++ b/drivers/s390/cio/device_pgid.c
@@ -213,6 +213,17 @@
spid_do(cdev);
}
+static int pgid_is_reset(struct pgid *p)
+{
+ char *c;
+
+ for (c = (char *)p + 1; c < (char *)(p + 1); c++) {
+ if (*c != 0)
+ return 0;
+ }
+ return 1;
+}
+
static int pgid_cmp(struct pgid *p1, struct pgid *p2)
{
return memcmp((char *) p1 + 1, (char *) p2 + 1,
@@ -223,7 +234,7 @@
* Determine pathgroup state from PGID data.
*/
static void pgid_analyze(struct ccw_device *cdev, struct pgid **p,
- int *mismatch, int *reserved, int *reset)
+ int *mismatch, int *reserved, u8 *reset)
{
struct pgid *pgid = &cdev->private->pgid[0];
struct pgid *first = NULL;
@@ -238,9 +249,8 @@
continue;
if (pgid->inf.ps.state2 == SNID_STATE2_RESVD_ELSE)
*reserved = 1;
- if (pgid->inf.ps.state1 == SNID_STATE1_RESET) {
- /* A PGID was reset. */
- *reset = 1;
+ if (pgid_is_reset(pgid)) {
+ *reset |= lpm;
continue;
}
if (!first) {
@@ -307,7 +317,7 @@
struct pgid *pgid;
int mismatch = 0;
int reserved = 0;
- int reset = 0;
+ u8 reset = 0;
u8 donepm;
if (rc)
@@ -321,11 +331,12 @@
donepm = pgid_to_donepm(cdev);
sch->vpm = donepm & sch->opm;
cdev->private->pgid_todo_mask &= ~donepm;
+ cdev->private->pgid_reset_mask |= reset;
pgid_fill(cdev, pgid);
}
out:
CIO_MSG_EVENT(2, "snid: device 0.%x.%04x: rc=%d pvm=%02x vpm=%02x "
- "todo=%02x mism=%d rsvd=%d reset=%d\n", id->ssid,
+ "todo=%02x mism=%d rsvd=%d reset=%02x\n", id->ssid,
id->devno, rc, cdev->private->pgid_valid_mask, sch->vpm,
cdev->private->pgid_todo_mask, mismatch, reserved, reset);
switch (rc) {