diff mbox series

[v3,1/6] usb: gadget: udc: gr: fix deferred probing

Message ID 20211210204634.8182-2-s.shtylyov@omp.ru
State New
Headers show
Series Fix deferred probing in the USB host/gadget drivers | expand

Commit Message

Sergey Shtylyov Dec. 10, 2021, 8:46 p.m. UTC
The driver overrides the error codes and IRQ0 returned by platform_get_irq()
to -ENODEV, so if it returns -EPROBE_DEFER, the driver will fail the probe
permanently instead of the deferred probing. Switch to propagating the error
codes upstream. IRQ0 is no longer returned by platform_get_irq(), so we now
can safely ignore it...

Fixes: 9ec36cafe43b ("of/irq: do irq resolution in platform_get_irq")
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
---
Changes in version 3:
- corrected the "Fixes:" tag.

Changes in version 2:
- updated the patch description on treating IRQ0.

 drivers/usb/gadget/udc/gr_udc.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

Comments

Greg KH Dec. 13, 2021, 2:11 p.m. UTC | #1
On Fri, Dec 10, 2021 at 11:46:29PM +0300, Sergey Shtylyov wrote:
> The driver overrides the error codes and IRQ0 returned by platform_get_irq()
> to -ENODEV, so if it returns -EPROBE_DEFER, the driver will fail the probe
> permanently instead of the deferred probing. Switch to propagating the error
> codes upstream. IRQ0 is no longer returned by platform_get_irq(), so we now
> can safely ignore it...

What commit keeps IRQ0 from being returned by platform_get_irq()?
Sergey Shtylyov Dec. 13, 2021, 3:21 p.m. UTC | #2
Hello!

On 12/13/21 5:11 PM, Greg Kroah-Hartman wrote:

>> The driver overrides the error codes and IRQ0 returned by platform_get_irq()
>> to -ENODEV, so if it returns -EPROBE_DEFER, the driver will fail the probe
>> permanently instead of the deferred probing. Switch to propagating the error
>> codes upstream. IRQ0 is no longer returned by platform_get_irq(), so we now
>> can safely ignore it...
> 
> What commit keeps IRQ0 from being returned by platform_get_irq()?

   It's yet unmerged patch on which (as I wrote in the cover letter) the series
depend:

https://marc.info/?l=linux-kernel&m=163623041902285

MBR, Sergey
diff mbox series

Patch

diff --git a/drivers/usb/gadget/udc/gr_udc.c b/drivers/usb/gadget/udc/gr_udc.c
index 4b35739d3695..4aa5246a77e5 100644
--- a/drivers/usb/gadget/udc/gr_udc.c
+++ b/drivers/usb/gadget/udc/gr_udc.c
@@ -2136,15 +2136,15 @@  static int gr_probe(struct platform_device *pdev)
 		return PTR_ERR(regs);
 
 	dev->irq = platform_get_irq(pdev, 0);
-	if (dev->irq <= 0)
-		return -ENODEV;
+	if (dev->irq < 0)
+		return dev->irq;
 
 	/* Some core configurations has separate irqs for IN and OUT events */
 	dev->irqi = platform_get_irq(pdev, 1);
 	if (dev->irqi > 0) {
 		dev->irqo = platform_get_irq(pdev, 2);
-		if (dev->irqo <= 0)
-			return -ENODEV;
+		if (dev->irqo < 0)
+			return dev->irqo;
 	} else {
 		dev->irqi = 0;
 	}