Hi,
Arnd Bergmann <arnd@xxxxxxxx> writes:
> Building with W=1, we get a warning about harmless empty statements:
>
> drivers/usb/dwc3/ep0.c: In function 'dwc3_ep0_handle_intf':
> drivers/usb/dwc3/ep0.c:491:4: error: suggest braces around empty body in an 'if' statement [-Werror=empty-body]
>
> gcc does not warn about {} here, so maybe use that instead.
> Alternatively, the code could be removed entirely as it does
> nothing.
>
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> ---
> This has been present in the driver for a while, but the code
> just moved around, so it showed up as a new warning for me.
> I hope to eventually address all W=1 warnings as they tend to
> find real bugs elsewhere and we may as well fix it now that the
> code has changed.
Thank you, the only problem is that now checkpatch.pl warns. I'll just
remove the code and turn it into a comment. Authorship kept, let me know
if you're okay with me adding your S-o-b:
8<------------------------------------------------------------------------
From ea97b854e5c4437975c5d0e887488390410cfb30 Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@xxxxxxxx>
Date: Wed, 16 Nov 2016 16:37:30 +0100
Subject: [PATCH] usb: dwc3: ep0: avoid empty-body warning
Building with W=1, we get a warning about harmless empty statements:
drivers/usb/dwc3/ep0.c: In function 'dwc3_ep0_handle_intf':
drivers/usb/dwc3/ep0.c:491:4: error: suggest braces around empty body in an 'if' statement [-Werror=empty-body]
Instead of adding empty braces which would introduce checkpatch.pl
warnings, we're just removing the code which doesn't do anything and
making sure we return 0 so USBCV tool is happy.
NYET-Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx>
---
drivers/usb/dwc3/ep0.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index 2b22ea7263d8..4c0664640862 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -486,12 +486,13 @@ static int dwc3_ep0_handle_intf(struct dwc3 *dwc,
switch (wValue) {
case USB_INTRF_FUNC_SUSPEND:
- if (wIndex & USB_INTRF_FUNC_SUSPEND_LP)
- /* XXX enable Low power suspend */
- ;
- if (wIndex & USB_INTRF_FUNC_SUSPEND_RW)
- /* XXX enable remote wakeup */
- ;
+ /*
+ * REVISIT: Ideally we would enable some low power mode here,
+ * however it's unclear what we should be doing here.
+ *
+ * For now, we're not doing anything, just making sure we return
+ * 0 so USB Command Verifier tests pass without any errors.
+ */
break;
default:
ret = -EINVAL;
--
2.10.1
--
balbi
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