[bug report] staging: mt7621-mmc: MIPS: ralink: add sdhci for mt7620a SoC

[Christian Lütke-Stetzkamp]

On Thu, Apr 05, 2018 at 03:13:10PM +0300, Dan Carpenter wrote:
> [ I just decided to forward you guys all the Smatch warnings.  -dan ]
> 
> Hello John Crispin,
> 
> The patch 8b634a9c7620: "staging: mt7621-mmc: MIPS: ralink: add sdhci
> for mt7620a SoC" from Mar 15, 2018, leads to the following static
> checker warning:
>
> 	drivers/staging/mt7621-mmc/sd.c:951 msdc_command_start()
> 	warn: we tested 'opcode == 3' before and it was 'false'
>
>         drivers/staging/mt7621-mmc/sd.c:2961 msdc_drv_suspend()
>         warn: variable dereferenced before check 'mmc' (see line 2959)
>
>         drivers/staging/mt7621-mmc/sd.c:2976 msdc_drv_resume()
>         warn: variable dereferenced before check 'mmc' (see line 2972)
>
>         drivers/staging/mt7621-mmc/dbg.c:270 msdc_debug_proc_write()
>         warn: copy_to/from_user() returns a positive value
>
>         drivers/staging/mt7621-mmc/dbg.c:339 msdc_debug_proc_init()
>         warn: proc file '"msdc_debug"' is world writable
>
> 	drivers/staging/mt7621-mmc/dbg.c:341 msdc_debug_proc_init()
> 	warn: 'de' isn't an ERR_PTR

Hi Dan,

thanks for the report, I have created patches for all of these and
will send them, once my previous series got merged, because I based
them on that status.

Christian