diff options
| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2010-10-25 16:10:34 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2010-10-25 16:10:19 +0200 |
| commit | 585b954e1f2fa325d425b0786e4525ac7c9ae575 (patch) | |
| tree | e79174793782e81820c7f6896284f7e341bf9e9d /drivers/s390/cio/device_pgid.c | |
| parent | eb4f5d93d70458ea644e0f46737f0bcf87280e83 (diff) | |
[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>
Diffstat (limited to 'drivers/s390/cio/device_pgid.c')
| -rw-r--r-- | drivers/s390/cio/device_pgid.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/drivers/s390/cio/device_pgid.c b/drivers/s390/cio/device_pgid.c index 82a5ad0d63f6..07a4fd29f096 100644 --- a/drivers/s390/cio/device_pgid.c +++ b/drivers/s390/cio/device_pgid.c @@ -213,6 +213,17 @@ static void spid_start(struct ccw_device *cdev) 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 @@ static int pgid_cmp(struct pgid *p1, struct pgid *p2) * 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 @@ static void pgid_analyze(struct ccw_device *cdev, struct pgid **p, 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 @@ static void snid_done(struct ccw_device *cdev, int rc) struct pgid *pgid; int mismatch = 0; int reserved = 0; - int reset = 0; + u8 reset = 0; u8 donepm; if (rc) @@ -321,11 +331,12 @@ static void snid_done(struct ccw_device *cdev, int rc) 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) { |