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| author | H Hartley Sweeten | 2012-12-19 23:44:02 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2013-01-07 23:25:49 +0100 |
| commit | c098c21a9d32f1cd828f23e617cb55909c75e7e2 (patch) | |
| tree | 2e9e7ebd62a4cb218cc350fc5a4ea40d7c8acc2f /drivers/staging/comedi/comedi_fops.c | |
| parent | staging: comedi: comedi_fops: don't export comedi_get_subdevice_runflags() (diff) | |
| download | kernel-qcow2-linux-c098c21a9d32f1cd828f23e617cb55909c75e7e2.tar.gz kernel-qcow2-linux-c098c21a9d32f1cd828f23e617cb55909c75e7e2.tar.xz kernel-qcow2-linux-c098c21a9d32f1cd828f23e617cb55909c75e7e2.zip | |
staging: comedi: comedi_fops: introduce comedi_is_subdevice_in_error()
Introduce, and use, a helper to check the subdevice runflags to see if
the SRF_ERROR flag is set.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/comedi/comedi_fops.c')
| -rw-r--r-- | drivers/staging/comedi/comedi_fops.c | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c index 7d85f57f584b..eb962178b643 100644 --- a/drivers/staging/comedi/comedi_fops.c +++ b/drivers/staging/comedi/comedi_fops.c @@ -382,6 +382,13 @@ bool comedi_is_subdevice_running(struct comedi_subdevice *s) } EXPORT_SYMBOL_GPL(comedi_is_subdevice_running); +static bool comedi_is_subdevice_in_error(struct comedi_subdevice *s) +{ + unsigned runflags = comedi_get_subdevice_runflags(s); + + return (runflags & SRF_ERROR) ? true : false; +} + /* This function restores a subdevice to an idle state. */ @@ -1908,12 +1915,10 @@ static ssize_t comedi_write(struct file *file, const char __user *buf, if (!comedi_is_subdevice_running(s)) { if (count == 0) { - if (comedi_get_subdevice_runflags(s) & - SRF_ERROR) { + if (comedi_is_subdevice_in_error(s)) retval = -EPIPE; - } else { + else retval = 0; - } do_become_nonbusy(dev, s); } break; @@ -2015,12 +2020,10 @@ static ssize_t comedi_read(struct file *file, char __user *buf, size_t nbytes, if (n == 0) { if (!comedi_is_subdevice_running(s)) { do_become_nonbusy(dev, s); - if (comedi_get_subdevice_runflags(s) & - SRF_ERROR) { + if (comedi_is_subdevice_in_error(s)) retval = -EPIPE; - } else { + else retval = 0; - } break; } if (file->f_flags & O_NONBLOCK) { |