From: Ian Abbott Date: Tue, 18 Sep 2012 18:46:59 +0000 (+0100) Subject: staging: comedi: sparse warning in insn_rw_emulate_bits() X-Git-Tag: next-20120920~22^2~1 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=9f82e95773f0f02cfc948c8346a61d161f4eb61b;p=karo-tx-linux.git staging: comedi: sparse warning in insn_rw_emulate_bits() `insn_rw_emulate_bits()` is used to emulate the `INSN_READ` and `INSN_WRITE` comedi instructions for subdevices that don't have an `insn_read()` or `insn_write()` handler but do have an `insn_bits()` handler. The function fills in a temporary `struct comedi_insn` called `new_insn` to pass to the subdevice's `insn_bits()` handler. In doing so, it sets the `new_insn.data` pointer to point to a temporary data array. This results in a warning from "sparse" because the `data` pointer in `struct comedi_insn` has the `__user` tag. The subdevice's `insn_bits()` handler ignores it anyway as it gets passed a pointer to the temporary data array in a separate parameter. Don't bother setting `new_insn.data`; just leave it set to `NULL` (done by an earlier `memset()`). Signed-off-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/comedi/drivers.c b/drivers/staging/comedi/drivers.c index 2c21dbd89455..1db6bfdbf13b 100644 --- a/drivers/staging/comedi/drivers.c +++ b/drivers/staging/comedi/drivers.c @@ -415,7 +415,6 @@ static int insn_rw_emulate_bits(struct comedi_device *dev, new_insn.insn = INSN_BITS; new_insn.chanspec = base_bitfield_channel; new_insn.n = 2; - new_insn.data = new_data; new_insn.subdev = insn->subdev; if (insn->insn == INSN_WRITE) {