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([183.91.15.56]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2c164f70660sm210755635ad.11.2026.06.09.04.39.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 09 Jun 2026 04:39:22 -0700 (PDT) From: phucduc.bui@gmail.com To: Kuninori Morimoto , Mark Brown , Geert Uytterhoeven Cc: Liam Girdwood , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Magnus Damm , Jaroslav Kysela , Takashi Iwai , linux-sound@vger.kernel.org, linux-renesas-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, bui duc phuc Subject: [PATCH v6 05/11] ASoC: renesas: fsi: Fix register access from in-flight IRQ after shutdown Date: Tue, 9 Jun 2026 18:38:30 +0700 Message-ID: <20260609113836.45079-6-phucduc.bui@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260609113836.45079-1-phucduc.bui@gmail.com> References: <20260609113836.45079-1-phucduc.bui@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: bui duc phuc In-flight IRQs may still be running when the SPU clock is disabled, leading to register access after shutdown and causing system hangs. Fix this to use fsi_stream_is_working() when handling in-flight IRQ handlers. If no streams are active, the handler now returns immediately to prevent hardware access. Acked-by: Kuninori Morimoto Suggested-by: Kuninori Morimoto Signed-off-by: bui duc phuc --- Changes in v6: - Add Acked-by tag from Kuninori Morimoto. Changes in v4: - use fsi_stream_is_working instead of running_streams. sound/soc/renesas/fsi.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/sound/soc/renesas/fsi.c b/sound/soc/renesas/fsi.c index 0bd0e0c8c5a3..3e3c6fd7c56b 100644 --- a/sound/soc/renesas/fsi.c +++ b/sound/soc/renesas/fsi.c @@ -470,6 +470,10 @@ static int fsi_get_current_fifo_samples(struct fsi_priv *fsi, static void fsi_count_fifo_err(struct fsi_priv *fsi) { + if (!fsi_stream_is_working(fsi, &fsi->playback) && + !fsi_stream_is_working(fsi, &fsi->capture)) + return; + u32 ostatus = fsi_reg_read(fsi, DOFF_ST); u32 istatus = fsi_reg_read(fsi, DIFF_ST); @@ -681,6 +685,10 @@ static void fsi_irq_clear_status(struct fsi_priv *fsi) u32 data = 0; struct fsi_master *master = fsi_get_master(fsi); + if (!fsi_stream_is_working(fsi, &fsi->playback) && + !fsi_stream_is_working(fsi, &fsi->capture)) + return; + data |= AB_IO(1, fsi_get_port_shift(fsi, &fsi->playback)); data |= AB_IO(1, fsi_get_port_shift(fsi, &fsi->capture)); -- 2.43.0