> -----Original Message----- > From: Pali Rohár [mailto:[email protected]] > Sent: Tuesday, October 17, 2017 1:45 PM > To: Limonciello, Mario <[email protected]> > Cc: [email protected]; Andy Shevchenko <[email protected]>; > LKML <[email protected]>; [email protected]; Andy > Lutomirski <[email protected]>; [email protected]; [email protected]; > [email protected]; [email protected]; Greg KH <[email protected]>; Alan Cox > <[email protected]> > Subject: Re: [PATCH v9 03/17] platform/x86: dell-wmi: clean up wmi descriptor > check > > On Tuesday 17 October 2017 13:21:47 Mario Limonciello wrote: > > Some cases the wrong type was used for errors and checks can be > > done more cleanly. > > > > Signed-off-by: Mario Limonciello <[email protected]> > > Reviewed-by: Edward O'Callaghan <[email protected]> > > Suggested-by: Andy Shevchenko <[email protected]> > > --- > > drivers/platform/x86/dell-wmi.c | 10 +++++----- > > 1 file changed, 5 insertions(+), 5 deletions(-) > > > > diff --git a/drivers/platform/x86/dell-wmi.c > > b/drivers/platform/x86/dell-wmi.c > > index 2cfaaa8faf0a..ece2fe341f01 100644 > > --- a/drivers/platform/x86/dell-wmi.c > > +++ b/drivers/platform/x86/dell-wmi.c > > @@ -663,19 +663,19 @@ static int dell_wmi_check_descriptor_buffer(struct > wmi_device *wdev) > > > > buffer = (u32 *)obj->buffer.pointer; > > > > - if (buffer[0] != 0x4C4C4544 && buffer[1] != 0x494D5720) { > > - dev_err(&wdev->dev, "Dell descriptor buffer has invalid > > signature > (%*ph)\n", > > - 8, buffer); > > + if (strncmp(obj->string.pointer, "DELL WMI", 8) != 0) { > > + dev_err(&wdev->dev, "Dell descriptor buffer has invalid > > signature > (%8ph)\n", > > + buffer); > > ret = -EINVAL; > > goto out; > > } > > > > if (buffer[2] != 0 && buffer[2] != 1) > > - dev_warn(&wdev->dev, "Dell descriptor buffer has unknown > version (%d)\n", > > + dev_warn(&wdev->dev, "Dell descriptor buffer has unknown > version (%u)\n", > > buffer[2]); > > To be correct, buffer[2] is of type "u32", not of type "unsigned". So > this patch does not fix it properly. >
What's the proper solution then? Cast buffer[2] to a known type length like unsigned long and use %lu?
