diff options
| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2013-04-13 14:53:21 +0400 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-04-17 16:07:30 +0400 |
| commit | 188561a462d3b82451d6ba09e2e32c9ba2c9938c (patch) | |
| tree | ced10861aad02cad5cac0e232c8c85964dd2dc1f /drivers/s390/cio/cio.c | |
| parent | 91c15a951091a64a5f048ff93292057e3b590b6f (diff) | |
| download | linux-188561a462d3b82451d6ba09e2e32c9ba2c9938c.tar.xz | |
s390/cio: wait_cons_dev don't use static variable
wait_cons_dev is used to busy wait for an interrupt on the console
ccw device. Stop using the static console_subchannel and add a
parameter to this function to specify on which ccw device/subchannel
we have to do the polling.
While at it rename the function to ccw_device_wait_idle and
move it to device.c
Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
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/cio.c')
| -rw-r--r-- | drivers/s390/cio/cio.c | 20 |
1 files changed, 2 insertions, 18 deletions
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c index 986ef6a92a41..2c1d53fb2fab 100644 --- a/drivers/s390/cio/cio.c +++ b/drivers/s390/cio/cio.c @@ -656,9 +656,9 @@ static int console_subchannel_in_use; /* * Use cio_tsch to update the subchannel status and call the interrupt handler - * if status had been pending. Called with the console_subchannel lock. + * if status had been pending. Called with the subchannel's lock held. */ -static void cio_tsch(struct subchannel *sch) +void cio_tsch(struct subchannel *sch) { struct irb *irb; int irq_context; @@ -690,22 +690,6 @@ void *cio_get_console_priv(void) return &console_priv; } -/* - * busy wait for the next interrupt on the console - */ -void wait_cons_dev(void) -{ - if (!console_subchannel_in_use) - return; - - while (1) { - cio_tsch(&console_subchannel); - if (console_subchannel.schib.scsw.cmd.actl == 0) - break; - udelay_simple(100); - } -} - static int cio_test_for_console(struct subchannel_id schid, void *data) { |