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[80.71.134.83]) by smtp.gmail.com with ESMTPSA id p35-20020a056402502300b00463b9d47e1fsm4932346eda.71.2022.11.28.01.10.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Nov 2022 01:10:36 -0800 (PST) Subject: [PATCH v3 0/2] ALSA: core: Fix deadlock when shutdown a frozen userspace MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAPR6hGMC/3XNQQrCMBAF0KuUrI10Jm1aXXkPcZGmYxNoE0hsQE vv7uBSdDX8D+/PJjIlT1mcq00kKj77GDioQyWsM2Ei6UfOAmtEAOxkDqO8J6IXSSCCRiH2CrVgMJ hMckgmWMckrPPMpfP5EdPz86AAn+vPrQKylm3XaDBKa7J4sS7Fxa/LMaZJ3Hip4H+NrMfeNNiSOW mtvvS+729I71yB6gAAAA== From: Ricardo Ribalda Date: Mon, 28 Nov 2022 10:10:12 +0100 Message-Id: <20221127-snd-freeze-v3-0-a2eda731ca14@chromium.org> To: Takashi Iwai , Len Brown , Pierre-Louis Bossart , Kai Vehmanen , Ranjani Sridharan , Mark Brown , Jaroslav Kysela , Pavel Machek , "Rafael J. Wysocki" Cc: alsa-devel@alsa-project.org, "Joel Fernandes (Google)" , Ricardo Ribalda , linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org X-Mailer: b4 0.11.0-dev-696ae X-Developer-Signature: v=1; a=openpgp-sha256; l=1634; i=ribalda@chromium.org; h=from:subject:message-id; bh=UZTGU/fsXJEA3ltnq4F2WvDw+A4ygx9FH7eOzblo+pg=; b=owEBbQKS/ZANAwAKAdE30T7POsSIAcsmYgBjhHr/j1G48WlxdIEEOXaXpHgUksIaanU3PEzs5LxT VFYlDcSJAjMEAAEKAB0WIQREDzjr+/4oCDLSsx7RN9E+zzrEiAUCY4R6/wAKCRDRN9E+zzrEiDSND/ 9bYOi0gOQKQUB1Ke/4A1WAaxC+iY9PHPZmeRlE3w3S+DePSWJocIg9/hq+TqgAi2pdJaB4aKXJMsRF QHXNNgVQuagnDLL8x/aXINyN0DDcRt2XRJUEc7RcKym5rNFVNm+OnKqq4lINr8mzkoEFZQwHbgMllP R2/gr6hy0fUAp9ey/+CgymaNMPc3opkp3bExJH8l1uYcjpPEotNZveVmD13BBBNsseRdJqnBoPdbsD GatYAsLiPW1ahZVyqy9O+i1uSUYNlhwTqeR3m+ARMQVMnVR3mGeegtwU82B1IS3Hn77KLe5jShtayi aEikqMHEoVNjx0MwkvzIwl+DMPlFc0zHo32W2vmqgKojydVa0Jcz1ZXB52bLjmZTnm4d3H1ua+shv9 5n0BNFpvpcxSFrcIKSWQsdQOplU88nw0qLKQ009fS1wvKk44vv5TkO8faZd5xspqYh7zSI4xmHHzeo 76Qak6EHRlI8u0P7uLRxBAcOUSGdgwZTlzZxTsHrIHe7aO27Bc46iLHmBT6cYccRIH1w8322jXlOze TZVSTQNw7NsgV2PcQBi2xHd+waL6wUyEwDIzHjXzv7jOhL7iuXEpSSz9C87P/yaUdDaCtpPPNYgmpA uWZpfP286KbmC0MIgQSFj0eCZ0BnMwVWxScheBjIrE/XViLZ1nZ5d7RB7JmA== X-Developer-Key: i=ribalda@chromium.org; a=openpgp; fpr=9EC3BB66E2FC129A6F90B39556A0D81F9F782DA9 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1750730547255576410?= X-GMAIL-MSGID: =?utf-8?q?1750730547255576410?= Since 83bfc7e793b5 ("ASoC: SOF: core: unregister clients and machine drivers in .shutdown") we wait for userspace to close its fds. But that will never occur with a frozen userspace (like during kexec()). Lets detect the frozen userpace and act accordingly. To: Jaroslav Kysela To: Takashi Iwai To: "Rafael J. Wysocki" To: Pavel Machek To: Len Brown To: Kai Vehmanen To: Ranjani Sridharan To: Pierre-Louis Bossart To: Mark Brown Cc: alsa-devel@alsa-project.org Cc: linux-kernel@vger.kernel.org Cc: "Joel Fernandes (Google)" Cc: linux-pm@vger.kernel.org Signed-off-by: Ricardo Ribalda --- Changes in v3: - Wrap pm_freezing in a function - Link to v2: https://lore.kernel.org/r/20221127-snd-freeze-v2-0-d8a425ea9663@chromium.org Changes in v2: - Only use pm_freezing if CONFIG_FREEZER - Link to v1: https://lore.kernel.org/r/20221127-snd-freeze-v1-0-57461a366ec2@chromium.org --- Ricardo Ribalda (2): freezer: Add processes_frozen() ALSA: core: Fix deadlock when shutdown a frozen userspace include/linux/freezer.h | 2 ++ kernel/freezer.c | 11 +++++++++++ sound/core/init.c | 13 +++++++++++++ 3 files changed, 26 insertions(+) --- base-commit: 4312098baf37ee17a8350725e6e0d0e8590252d4 change-id: 20221127-snd-freeze-1ee143228326 Best regards,