On Tue, Jan 22, 2019 at 10:22:59AM -0600, Steve Wise wrote:
> Hey Greg,
>
> On 1/22/2019 9:17 AM, Greg Kroah-Hartman wrote:
> > When calling debugfs functions, there is no need to ever check the
> > return value. The function can work or not, but the code logic should
> > never do something different based on this.
> >
> > Cc: Steve Wise <swise@xxxxxxxxxxx>
> > Cc: Doug Ledford <dledford@xxxxxxxxxx>
> > Cc: Jason Gunthorpe <jgg@xxxxxxxx>
> > Cc: linux-rdma@xxxxxxxxxxxxxxx
> > Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> > ---
> > drivers/infiniband/hw/cxgb4/device.c | 8 +-------
> > 1 file changed, 1 insertion(+), 7 deletions(-)
> >
> > diff --git a/drivers/infiniband/hw/cxgb4/device.c b/drivers/infiniband/hw/cxgb4/device.c
> > index c13c0ba30f63..9c10fff6dcfb 100644
> > --- a/drivers/infiniband/hw/cxgb4/device.c
> > +++ b/drivers/infiniband/hw/cxgb4/device.c
> > @@ -720,11 +720,8 @@ static const struct file_operations ep_debugfs_fops = {
> > .read = debugfs_read,
> > };
> >
> > -static int setup_debugfs(struct c4iw_dev *devp)
> > +static void setup_debugfs(struct c4iw_dev *devp)
> > {
> > - if (!devp->debugfs_root)
> > - return -1;
> > -
> > debugfs_create_file_size("qps", S_IWUSR, devp->debugfs_root,
> > (void *)devp, &qp_debugfs_fops, 4096);
> >
> > @@ -740,7 +737,6 @@ static int setup_debugfs(struct c4iw_dev *devp)
> > if (c4iw_wr_log)
> > debugfs_create_file_size("wr_log", S_IWUSR, devp->debugfs_root,
> > (void *)devp, &wr_log_debugfs_fops, 4096);
> > - return 0;
> > }
> >
> > void c4iw_release_dev_ucontext(struct c4iw_rdev *rdev,
> > @@ -1553,8 +1549,6 @@ static int __init c4iw_init_module(void)
> > return err;
> >
> > c4iw_debugfs_root = debugfs_create_dir(DRV_NAME, NULL);
> > - if (!c4iw_debugfs_root)
> > - pr_warn("could not create debugfs entry, continuing\n");
> >
> > reg_workq = create_singlethread_workqueue("Register_iWARP_device");
> > if (!reg_workq) {
> >
>
> So it is not a problem to call debugfs_create_file_size() when
> devp->debugfs_root is NULL?
Nope!
>
> Acked-by: Steve Wise <swise@xxxxxxxxxxxxxxxxxxxxx>
Thanks,
greg k-h
