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s390/cio: use cssid for pgid generation

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Obtain the real channel subsystem id and use that for the generation
of a unique path group id. Note that this change does not affect the
channel subsystem id as used in the user-visible naming of subchannels
and friends.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: Dong Jia Shi <bjsdjshik@linux.vnet.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott
2016-06-17 19:45:23 +02:00
committed by Martin Schwidefsky
parent 98cc43ab6b
commit e2e0de9b57
4 changed files with 53 additions and 3 deletions
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6
drivers/s390/cio/css.c
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@@ -703,7 +703,8 @@ css_generate_pgid(struct channel_subsystem *css, u32 tod_high)
if (css_general_characteristics.mcss) {
css->global_pgid.pgid_high.ext_cssid.version = 0x80;
css->global_pgid.pgid_high.ext_cssid.cssid = css->cssid;
css->global_pgid.pgid_high.ext_cssid.cssid =
(css->cssid < 0) ? 0 : css->cssid;
} else {
css->global_pgid.pgid_high.cpu_addr = stap();
}
@@ -794,7 +795,8 @@ static int __init setup_css(int nr)
}
mutex_init(&css->mutex);
css->valid = 1;
css->cssid = nr;
css->cssid = chsc_get_cssid(nr);
dev_set_name(&css->device, "css%x", nr);
css->device.release = channel_subsystem_release;
tod_high = (u32) (get_tod_clock() >> 32);