Ok, thank you, I didn't notice the existing thread. On Wed, 23 Apr 2014 10:55:29 -0500 Felipe Balbi <balbi@xxxxxx> wrote: > On Wed, Apr 23, 2014 at 05:39:43PM +0200, Olivier Gayot wrote: > > The following commit introduced the debugfs : > > > > 40f099e32c2a06bad7d75683421e30fcc74924cd > > Author: Markus Pargmann <mpa@xxxxxxxxxxxxxx> > > Date: Fri Jan 17 10:22:35 2014 +0100 > > > > usb: musb: dsps, debugfs files > > > > Unfortunately, a forgotten call to a cleanup function prevents the > > probing of musb in case of deferred probe. > > > > Because musb_init_controller() often retries and creates a new > > debugfs directory each time it is called, we need to remove that > > directory in case the initialization fails. Otherwise, the > > debugfs_create_dir() fails at subsequent calls because the > > directory already exists. > > > > Fixed by calling debugfs_remove_recursive() in the exit function. > > > > Signed-off-by: Olivier Gayot <ogayot@xxxxxxxxxxxx> > > Cc: Markus Pargmann <mpa@xxxxxxxxxxxxxx> > > --- > > drivers/usb/musb/musb_dsps.c | 2 ++ > > 1 file changed, 2 insertions(+) > > > > diff --git a/drivers/usb/musb/musb_dsps.c > > b/drivers/usb/musb/musb_dsps.c index 3372ded..c3de0a5 100644 > > --- a/drivers/usb/musb/musb_dsps.c > > +++ b/drivers/usb/musb/musb_dsps.c > > @@ -471,6 +471,8 @@ static int dsps_musb_exit(struct musb *musb) > > > > del_timer_sync(&glue->timer); > > > > + debugfs_remove_recursive(glue->dbgfs_root); > > + > > usb_phy_shutdown(musb->xceiv); > > return 0; > > First of all this commit is wrong, second of all I already have the > proper commit: > > commit 0fca91b8a446d4a38b8f3d4772c4a8665ebcd7b2 > Author: Daniel Mack <zonque@xxxxxxxxx> > Date: Wed Apr 2 11:46:51 2014 +0200 > > usb: musb: dsps: move debugfs_remove_recursive() > > When the platform initialization fails due to missing resources, > it will return -EPROBE_DEFER after dsps_musb_init() has been called. > > dsps_musb_init() calls dsps_musb_dbg_init() to allocate the > debugfs nodes. At a later point in time, the probe will be retried, > and dsps_musb_dbg_init() will be called again. debugfs_create_dir() > will fail this time, as the node already exists, and so the entire > device probe will fail with -ENOMEM. > > Fix this by moving debugfs_remove_recursive() from dsps_remove() > to the plaform's exit function, so it will be cleanly torn down when > the probe fails. It also feels more natural this way, as .exit is the > counterpart to .init. > > Signed-off-by: Daniel Mack <zonque@xxxxxxxxx> > Signed-off-by: Felipe Balbi <balbi@xxxxxx> > > diff --git a/drivers/usb/musb/musb_dsps.c > b/drivers/usb/musb/musb_dsps.c index 3372ded..e2fd263 100644 > --- a/drivers/usb/musb/musb_dsps.c > +++ b/drivers/usb/musb/musb_dsps.c > @@ -470,8 +470,9 @@ static int dsps_musb_exit(struct musb *musb) > struct dsps_glue *glue = dev_get_drvdata(dev->parent); > > del_timer_sync(&glue->timer); > - > usb_phy_shutdown(musb->xceiv); > + debugfs_remove_recursive(glue->dbgfs_root); > + > return 0; > } > > @@ -708,8 +709,6 @@ static int dsps_remove(struct platform_device > *pdev) pm_runtime_put(&pdev->dev); > pm_runtime_disable(&pdev->dev); > > - debugfs_remove_recursive(glue->dbgfs_root); > - > return 0; > } > > > a pull request has already been sent to Greg, should be in v3.15-rc3 > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
