[U-Boot] [PATCH v1] dfu: Avoid declaring unused variables and absent parameters
Lukasz Majewski
lukma at denx.de
Thu Mar 14 22:28:09 UTC 2019
Hi Tom, Andy,
> On Thu, Mar 14, 2019 at 10:19:58PM +0200, Andy Shevchenko wrote:
> > On Mon, Mar 04, 2019 at 04:04:44PM +0200, Andy Shevchenko wrote:
> > > The compiler is not happy when neither USB nor TFTP transport for
> > > DFU defined:
> > >
> > > cmd/dfu.c: In function ‘do_dfu’:
> > > cmd/dfu.c:31:8: warning: unused variable
> > > ‘devstring’ [-Wunused-variable] char *devstring = argv[3];
> > > ^~~~~~~~~
> > > cmd/dfu.c:30:8: warning: unused variable
> > > ‘interface’ [-Wunused-variable] char *interface = argv[2];
> > > ^~~~~~~~~
> > >
> > > Surround those variables by #ifdef expression.
> > >
> > > More serious, that comes under same circumstances, is a
> > > compilation error due to absence of macro parameter:
> >
> > Any comments on this?
> >
> > I don't know who is the right person to push this forward, please,
> > feel free to Cc to the right one, or tell me to resend with proper
> > Cc list.
I can only recommend using patman, which shall link the dfu: in topic
with my e-mail address,
>
> Lukasz?
Regarding the patch,
Acked-by: Lukasz Majewski <lukma at denx.de>
If the travis doesn't complain, feel free to apply it.
>
> >
> > >
> > > In file included from include/image.h:45,
> > > from include/common.h:35,
> > > from cmd/dfu.c:13:
> > > include/command.h:207:24: error: expected expression before ‘,’
> > > token # define _CMD_HELP(x) x,
> > > ^
> > > include/command.h:286:18: note: in expansion of macro ‘_CMD_HELP’
> > > _cmd, _usage, _CMD_HELP(_help) _CMD_COMPLETE(_comp) }
> > > ^~~~~~~~~
> > > include/command.h:290:3: note: in expansion of macro
> > > ‘U_BOOT_CMD_MKENT_COMPLETE’ U_BOOT_CMD_MKENT_COMPLETE(_name,
> > > _maxargs, _rep, _cmd, \ ^~~~~~~~~~~~~~~~~~~~~~~~~
> > > include/command.h:332:2: note: in expansion of macro
> > > ‘U_BOOT_CMD_COMPLETE’ U_BOOT_CMD_COMPLETE(_name, _maxargs, _rep,
> > > _cmd, _usage, _help, NULL) ^~~~~~~~~~~~~~~~~~~
> > > cmd/dfu.c:70:1: note: in expansion of macro ‘U_BOOT_CMD’
> > > U_BOOT_CMD(dfu, CONFIG_SYS_MAXARGS, 1, do_dfu,
> > > ^~~~~~~~~~
> > > make[1]: *** [scripts/Makefile.build:279: cmd/dfu.o] Error 1
> > > make: *** [Makefile:1518: cmd] Error 2
> > >
> > > Put empty string unconditionally to have macro parameter present.
> > >
> > > Fixes: 0f44d33536a5 ("dfu: Fix up the Kconfig mess")
> > > Cc: Marek Vasut <marek.vasut at gmail.com>
> > > Signed-off-by: Andy Shevchenko <andriy.shevchenko at linux.intel.com>
> > > ---
> > > cmd/dfu.c | 3 +++
> > > 1 file changed, 3 insertions(+)
> > >
> > > diff --git a/cmd/dfu.c b/cmd/dfu.c
> > > index 4adb91c1b0..498a30b33b 100644
> > > --- a/cmd/dfu.c
> > > +++ b/cmd/dfu.c
> > > @@ -27,8 +27,10 @@ static int do_dfu(cmd_tbl_t *cmdtp, int flag,
> > > int argc, char * const argv[]) #ifdef CONFIG_DFU_OVER_USB
> > > char *usb_controller = argv[1];
> > > #endif
> > > +#if defined(CONFIG_DFU_OVER_USB) || defined(CONFIG_DFU_OVER_TFTP)
> > > char *interface = argv[2];
> > > char *devstring = argv[3];
> > > +#endif
> > >
> > > int ret = 0;
> > > #ifdef CONFIG_DFU_OVER_TFTP
> > > @@ -67,6 +69,7 @@ done:
> > >
> > > U_BOOT_CMD(dfu, CONFIG_SYS_MAXARGS, 1, do_dfu,
> > > "Device Firmware Upgrade",
> > > + ""
> > > #ifdef CONFIG_DFU_OVER_USB
> > > #ifdef CONFIG_DFU_TIMEOUT
> > > "<USB_controller> <interface> <dev> [list|timeout]\n"
> > > --
> > > 2.20.1
> > >
> >
> > --
> > With Best Regards,
> > Andy Shevchenko
> >
> >
> > _______________________________________________
> > U-Boot mailing list
> > U-Boot at lists.denx.de
> > https://lists.denx.de/listinfo/u-boot
>
Best regards,
Lukasz Majewski
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma at denx.de
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