x86/resctrl: Remove unnecessary check for cbm_validate()
authorBabu Moger <Babu.Moger@amd.com>
Wed, 28 Nov 2018 22:42:47 +0000 (22:42 +0000)
committerBorislav Petkov <bp@suse.de>
Thu, 29 Nov 2018 07:36:12 +0000 (08:36 +0100)
commitcb74635faa17cfa2991ddbe027596270af525c6d
treeb64387ac301c95f9d915da70d907541bb2e3cc6f
parent456824896de2b68df40b3ea5777ef49dc6cc8fda
x86/resctrl: Remove unnecessary check for cbm_validate()

The Smatch static checker reports the following error after commit:

  a36c5ff560fb ("x86/resctrl: Bring cbm_validate() into the resource structure"):

  arch/x86/kernel/cpu/resctrl/ctrlmondata.c:227 parse_cbm()
  error: uninitialized symbol 'cbm_val'.
  arch/x86/kernel/cpu/resctrl/ctrlmondata.c:236 parse_cbm()
  error: uninitialized symbol 'cbm_val'.

This could happen if ->cbm_validate() is NULL which could leave cbm_val
uninitialized.

However, there is no case where ->cbm_validate() can be NULL as it is
initialized based on a vendor check. So it is either an Intel or an AMD
version it points to. And in both the cases it is initialized properly.
Thus, remove the first check.

Verified the fix running Smatch.

 [ bp: massage commit message. ]

Fixes: a36c5ff560fb ("x86/resctrl: Bring cbm_validate() into the resource structure")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Babu Moger <babu.moger@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Reinette Chatre <reinette.chatre@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20181128224234.22998-1-babu.moger@amd.com
arch/x86/kernel/cpu/resctrl/ctrlmondata.c