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Fri, 31 Jul 2026 10:04:56 -0700 (PDT) Date: Fri, 31 Jul 2026 18:04:54 +0100 From: Chris Bainbridge To: emmanuel.grumbach@intel.com Cc: johannes.berg@intel.com, miriam.rachel.korenblit@intel.com, linux-wireless@vger.kernel.org, regressions@lists.linux.dev Subject: [REGRESSION] iwlwifi IO_PAGE_FAULT and Master Disable Timed Out Message-ID: Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Hi, 0eaa1f245ac0 ("wifi: iwlwifi: mvm: don't support the reset handshake for old firmwares") introduced an intermittent boot regression on my laptop: [ 15.974991] iwlwifi 0000:01:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x000a address=0xbe9f5000 flags=0x0000] [ 15.976184] iwlwifi 0000:01:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x000a address=0xbe9f5400 flags=0x0000] [ 15.978501] iwlwifi 0000:01:00.0: Master Disable Timed Out, 100 usec The commit only contains: + /* Those firmware versions claim to support the fw_reset_handshake + * but they are buggy. + */ + if (IWL_UCODE_MAJOR(mvm->fw->ucode_ver) <= 77) + trans->conf.fw_reset_handshake = false; The if condition is evaluating true on my laptop despite using firmware ty-a0-gf-a0-89.ucode. So I suspect this is not the correct way to check the firmware version? Also comment #21 on bugzilla.kernel.org bug #220600 (which this commit was supposed to fix) reports the same "Master Disable Timed Out" error (although no IO_PAGE_FAULTS, probably the bad memory access is not caught without iommu=strict). #regzbot introduced: 0eaa1f245ac03ed0c6394159360532726f666811