diff options
author | H Hartley Sweeten <hsweeten@visionengravers.com> | 2014-04-16 14:19:07 -0700 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-04-22 10:18:47 -0700 |
commit | 8802cd842db76d29dd24bbe555f82b478b0fd469 (patch) | |
tree | 435d6715eaad788345c5e2fa476b8c69944106c3 /drivers/staging/comedi/drivers/adl_pci9111.c | |
parent | c9b1420c397314a4855af70aadb79450d1bd6fe0 (diff) |
staging: comedi: adl_pci9111: factor out chanlist checking from (*do_cmdtest)
Step 5 of the (*do_cmdtest) validates that the cmd->chanlist is compatible
with the hardware.
For aesthetics, factor out the step 5 code for the analog input async command
support. Tidy up the factored out code.
To minimize the noise, change the comedi_err(), which is a wrapper around
dev_err(), to dev_dbg().
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/comedi/drivers/adl_pci9111.c')
-rw-r--r-- | drivers/staging/comedi/drivers/adl_pci9111.c | 68 |
1 files changed, 38 insertions, 30 deletions
diff --git a/drivers/staging/comedi/drivers/adl_pci9111.c b/drivers/staging/comedi/drivers/adl_pci9111.c index a29ceacb966d..575af7444716 100644 --- a/drivers/staging/comedi/drivers/adl_pci9111.c +++ b/drivers/staging/comedi/drivers/adl_pci9111.c @@ -314,6 +314,41 @@ static int pci9111_ai_cancel(struct comedi_device *dev, return 0; } +static int pci9111_ai_check_chanlist(struct comedi_device *dev, + struct comedi_subdevice *s, + struct comedi_cmd *cmd) +{ + unsigned int range0 = CR_RANGE(cmd->chanlist[0]); + unsigned int aref0 = CR_AREF(cmd->chanlist[0]); + int i; + + for (i = 1; i < cmd->chanlist_len; i++) { + unsigned int chan = CR_CHAN(cmd->chanlist[i]); + unsigned int range = CR_RANGE(cmd->chanlist[i]); + unsigned int aref = CR_AREF(cmd->chanlist[i]); + + if (chan != i) { + dev_dbg(dev->class_dev, + "entries in chanlist must be consecutive channels,counting upwards from 0\n"); + return -EINVAL; + } + + if (range != range0) { + dev_dbg(dev->class_dev, + "entries in chanlist must all have the same gain\n"); + return -EINVAL; + } + + if (aref != aref0) { + dev_dbg(dev->class_dev, + "entries in chanlist must all have the same reference\n"); + return -EINVAL; + } + } + + return 0; +} + static int pci9111_ai_do_cmd_test(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_cmd *cmd) @@ -321,8 +356,6 @@ static int pci9111_ai_do_cmd_test(struct comedi_device *dev, struct pci9111_private_data *dev_private = dev->private; int tmp; int error = 0; - int range, reference; - int i; /* Step 1 : check if triggers are trivially valid */ @@ -426,34 +459,9 @@ static int pci9111_ai_do_cmd_test(struct comedi_device *dev, if (error) return 4; - /* Step 5 : check channel list */ - - if (cmd->chanlist) { - - range = CR_RANGE(cmd->chanlist[0]); - reference = CR_AREF(cmd->chanlist[0]); - - if (cmd->chanlist_len > 1) { - for (i = 0; i < cmd->chanlist_len; i++) { - if (CR_CHAN(cmd->chanlist[i]) != i) { - comedi_error(dev, - "entries in chanlist must be consecutive " - "channels,counting upwards from 0\n"); - error++; - } - if (CR_RANGE(cmd->chanlist[i]) != range) { - comedi_error(dev, - "entries in chanlist must all have the same gain\n"); - error++; - } - if (CR_AREF(cmd->chanlist[i]) != reference) { - comedi_error(dev, - "entries in chanlist must all have the same reference\n"); - error++; - } - } - } - } + /* Step 5: check channel list if it exists */ + if (cmd->chanlist && cmd->chanlist_len > 0) + error |= pci9111_ai_check_chanlist(dev, s, cmd); if (error) return 5; |