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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-05-31 09:09:57 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-06-13 15:58:19 +0200 |
| commit | 2f82f57763d97700788cf228de1cf30ffd4153b4 (patch) | |
| tree | 39cacadec4bc9203b539c60f815f4c2f77b92a1b /drivers/s390/cio/chsc.c | |
| parent | s390/kexec: fix crash on resize of reserved memory (diff) | |
| download | linux-2f82f57763d97700788cf228de1cf30ffd4153b4.tar.xz linux-2f82f57763d97700788cf228de1cf30ffd4153b4.zip | |
s390/time: STP sync clock correction
The sync clock operation of the channel subsystem call for STP delivers
the TOD clock difference as a result. Use this TOD clock difference
instead of the difference between the TOD timestamps before and after
the sync clock operation.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/chsc.c')
| -rw-r--r-- | drivers/s390/cio/chsc.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c index c424c0c7367e..452193f7298c 100644 --- a/drivers/s390/cio/chsc.c +++ b/drivers/s390/cio/chsc.c @@ -1176,7 +1176,7 @@ exit: EXPORT_SYMBOL_GPL(css_general_characteristics); EXPORT_SYMBOL_GPL(css_chsc_characteristics); -int chsc_sstpc(void *page, unsigned int op, u16 ctrl) +int chsc_sstpc(void *page, unsigned int op, u16 ctrl, u64 *clock_delta) { struct { struct chsc_header request; @@ -1186,7 +1186,9 @@ int chsc_sstpc(void *page, unsigned int op, u16 ctrl) unsigned int ctrl : 16; unsigned int rsvd2[5]; struct chsc_header response; - unsigned int rsvd3[7]; + unsigned int rsvd3[3]; + u64 clock_delta; + unsigned int rsvd4[2]; } __attribute__ ((packed)) *rr; int rc; @@ -1200,6 +1202,8 @@ int chsc_sstpc(void *page, unsigned int op, u16 ctrl) if (rc) return -EIO; rc = (rr->response.code == 0x0001) ? 0 : -EIO; + if (clock_delta) + *clock_delta = rr->clock_delta; return rc; } |