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d="scan'208";a="880256" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orvoesa101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Sep 2023 04:24:35 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10847"; a="753353726" X-IronPort-AV: E=Sophos;i="6.03,187,1694761200"; d="scan'208";a="753353726" Received: from dev2 (HELO DEV2.igk.intel.com) ([10.237.148.94]) by fmsmga007.fm.intel.com with ESMTP; 29 Sep 2023 04:24:33 -0700 From: =?utf-8?q?Amadeusz_S=C5=82awi=C5=84ski?= To: Mark Brown Cc: Cezary Rojewski , Takashi Iwai , Jaroslav Kysela , alsa-devel@alsa-project.org, =?utf-8?q?Amadeusz_S=C5=82awi=C5=84ski?= Subject: [PATCH 4/6] ASoC: Intel: avs: Keep module refcount up when gathering traces Date: Fri, 29 Sep 2023 13:24:34 +0200 Message-Id: <20230929112436.787058-5-amadeuszx.slawinski@linux.intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230929112436.787058-1-amadeuszx.slawinski@linux.intel.com> References: <20230929112436.787058-1-amadeuszx.slawinski@linux.intel.com> MIME-Version: 1.0 Message-ID-Hash: G6GDGLZXGN2QVGI2O3XQMJ7A5YVXAYEQ X-Message-ID-Hash: G6GDGLZXGN2QVGI2O3XQMJ7A5YVXAYEQ X-MailFrom: amadeuszx.slawinski@linux.intel.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-alsa-devel.alsa-project.org-0; header-match-alsa-devel.alsa-project.org-1; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.8 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: Cezary Rojewski To prevent rmmod and similar behave unexpectedly when invoked on snd_soc_avs module while the AudioDSP firmware tracing is ongoing, increase the module refcount until the tracing is stopped. Signed-off-by: Cezary Rojewski Signed-off-by: Amadeusz Sławiński --- sound/soc/intel/avs/debugfs.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/sound/soc/intel/avs/debugfs.c b/sound/soc/intel/avs/debugfs.c index bdd388ec01ea..4dfbff0ce508 100644 --- a/sound/soc/intel/avs/debugfs.c +++ b/sound/soc/intel/avs/debugfs.c @@ -236,6 +236,9 @@ static int strace_open(struct inode *inode, struct file *file) struct avs_dev *adev = inode->i_private; int ret; + if (!try_module_get(adev->dev->driver->owner)) + return -ENODEV; + if (kfifo_initialized(&adev->trace_fifo)) return -EBUSY; @@ -270,6 +273,7 @@ static int strace_release(struct inode *inode, struct file *file) spin_unlock_irqrestore(&adev->trace_lock, flags); + module_put(adev->dev->driver->owner); return 0; }