[PATCH 3.4 28/31] staging: comedi: ssv_dnp: use comedi_dio_update_state()

From: Greg Kroah-Hartman
Date: Wed Dec 18 2013 - 16:11:29 EST


3.4-stable review patch. If anyone has any objections, please let me know.

------------------

From: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>

commit f6b316bcd8c421acd6fa5a6e18b4c846ecb9d965 upstream.

Use comedi_dio_update_state() to handle the boilerplate code to update
the subdevice s->state.

Also, fix a bug where the state of the channels is returned in data[0].
The comedi core expects it to be returned in data[1].

Signed-off-by: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>
Reviewed-by: Ian Abbott <abbotti@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/staging/comedi/drivers/ssv_dnp.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/staging/comedi/drivers/ssv_dnp.c
+++ b/drivers/staging/comedi/drivers/ssv_dnp.c
@@ -251,11 +251,11 @@ static int dnp_dio_insn_bits(struct come

/* on return, data[1] contains the value of the digital input lines. */
outb(PADR, CSCIR);
- data[0] = inb(CSCDR);
+ data[1] = inb(CSCDR);
outb(PBDR, CSCIR);
- data[0] += inb(CSCDR) << 8;
+ data[1] += inb(CSCDR) << 8;
outb(PCDR, CSCIR);
- data[0] += ((inb(CSCDR) & 0xF0) << 12);
+ data[1] += ((inb(CSCDR) & 0xF0) << 12);

return 2;



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