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Lin" , Singo Chang , Nancy Lin , , , , Subject: [PATCH 0/2] Fix sleeping function called from invalid context Date: Fri, 14 Jun 2024 12:01:31 +0800 Message-ID: <20240614040133.24967-1-jason-jh.lin@mediatek.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240613_210213_389560_70D0C57D X-CRM114-Status: UNSURE ( 8.70 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org We found that there is a spin_lock_irqsave protection in msg_submit() of mailbox.c and it is in the atomic context. So when the mailbox controller driver calls pm_runtime_get_sync() in mbox_chan_ops->send_data(), it will get this BUG report. "BUG: sleeping function called from invalid context at drivers/base/power/runtime.c:1164" Add API to mbox_chan_ops to make mailbox takes into account that a driver may need PM done. Jason-JH.Lin (2): mailbox: Add power_get/power_put API to mbox_chan_ops mailbox: mtk-cmdq: Move pm_runimte_get and put to mbox_chan_ops API drivers/mailbox/mailbox.c | 55 ++++++++++++++++++++++++++++++ drivers/mailbox/mtk-cmdq-mailbox.c | 37 ++++++++++---------- include/linux/mailbox_controller.h | 11 ++++++ 3 files changed, 84 insertions(+), 19 deletions(-)