From: Dan Carpenter <dan.carpenter@oracle.com>
To: kbuild@lists.01.org, Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Cc: lkp@intel.com, kbuild-all@lists.01.org,
"Linux Memory Management List" <linux-mm@kvack.org>,
"José Roberto de Souza" <jose.souza@intel.com>,
"Anshuman Gupta" <anshuman.gupta@intel.com>
Subject: [kbuild] [linux-next:master 317/9190] drivers/gpu/drm/i915/display/intel_psr.c:1517:30: warning: Redundant condition: intel_dp->psr.enabled. '!A || (A && B)' is equivalent to '!A || B' [redundantCondition]
Date: Fri, 9 Apr 2021 11:29:05 +0300 [thread overview]
Message-ID: <20210409082905.GC6048@kadam> (raw)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: 454c576c3f5e51d60f00a4ac0dde07f4f9d70e9d
commit: b64d6c51380b7dea17d5503a250ca9cc84025453 [317/9190] drm/i915/display: Support PSR Multiple Instances
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
cppcheck possible warnings: (new ones prefixed by >>, may not real problems)
>> drivers/gpu/drm/i915/display/intel_psr.c:1517:30: warning: Redundant condition: intel_dp->psr.enabled. '!A || (A && B)' is equivalent to '!A || B' [redundantCondition]
if (!intel_dp->psr.enabled ||
^
drivers/gpu/drm/i915/display/intel_psr.c:362:11: warning: Same expression on both sides of '-'. [duplicateExpression]
[3] = 1 - 1,
^
vim +1517 drivers/gpu/drm/i915/display/intel_psr.c
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1503 void intel_psr_wait_for_idle(const struct intel_crtc_state *new_crtc_state)
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1504 {
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1505 struct drm_i915_private *dev_priv = to_i915(new_crtc_state->uapi.crtc->dev);
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1506 struct intel_encoder *encoder;
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1507
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1508 if (!new_crtc_state->has_psr)
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1509 return;
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1510
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1511 for_each_intel_encoder_mask_can_psr(&dev_priv->drm, encoder,
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1512 new_crtc_state->uapi.encoder_mask) {
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1513 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1514 u32 psr_status;
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1515
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1516 mutex_lock(&intel_dp->psr.lock);
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 @1517 if (!intel_dp->psr.enabled ||
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1518 (intel_dp->psr.enabled && intel_dp->psr.psr2_enabled)) {
^^^^^^^^^^^^^^^^^^^^^
More clear to write:
if (!intel_dp->psr.enabled || intel_dp->psr.psr2_enabled) {
mutex_unlock(&intel_dp->psr.lock);
continue;
}
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1519 mutex_unlock(&intel_dp->psr.lock);
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1520 continue;
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1521 }
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1522
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1523 /* when the PSR1 is enabled */
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1524 if (psr_wait_for_idle(intel_dp, &psr_status))
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1525 drm_err(&dev_priv->drm,
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1526 "PSR idle timed out 0x%x, atomic update may fail\n",
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1527 psr_status);
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1528 mutex_unlock(&intel_dp->psr.lock);
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1529 }
b64d6c51380b7d drivers/gpu/drm/i915/display/intel_psr.c Gwan-gyeong Mun 2021-02-04 1530 }
---
0-DAY CI Kernel Test Service, Intel Corporation
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