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Mon, 2 Dec 2019 14:31:34 -0600 Received: from DFLE107.ent.ti.com (10.64.6.28) by DFLE109.ent.ti.com (10.64.6.30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3; Mon, 2 Dec 2019 14:31:33 -0600 Received: from fllv0040.itg.ti.com (10.64.41.20) by DFLE107.ent.ti.com (10.64.6.28) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3 via Frontend Transport; Mon, 2 Dec 2019 14:31:32 -0600 Received: from feketebors.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id xB2KVOPn106889; Mon, 2 Dec 2019 14:31:30 -0600 From: Peter Ujfalusi To: Subject: [PATCH 2/3] dmaengine: ti: k3-udma: Workaround for stale transfers Date: Mon, 2 Dec 2019 22:31:27 +0200 Message-ID: <20191202203128.14348-3-peter.ujfalusi@ti.com> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191202203128.14348-1-peter.ujfalusi@ti.com> References: <0191128105945.13071-1-peter.ujfalusi@ti.com> <20191202203128.14348-1-peter.ujfalusi@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191202_123146_216278_CD83E26E X-CRM114-Status: GOOD ( 10.40 ) X-Spam-Score: -2.5 (--) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-2.5 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [198.47.23.248 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: grygorii.strashko@ti.com, vigneshr@ti.com, tony@atomide.com, linux-kernel@vger.kernel.org, t-kristo@ti.com, dmaengine@vger.kernel.org, dan.j.williams@intel.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org If the client does issue_pending between terminte_all+synchronize and free_chan_resources, we need to make sure that it has been handled and cleared up. Signed-off-by: Peter Ujfalusi --- drivers/dma/ti/k3-udma.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c index 1b929f7a84d4..3aede5db9604 100644 --- a/drivers/dma/ti/k3-udma.c +++ b/drivers/dma/ti/k3-udma.c @@ -2842,6 +2842,10 @@ static void udma_free_chan_resources(struct dma_chan *chan) struct udma_dev *ud = to_udma_dev(chan->device); udma_terminate_all(chan); + if (uc->terminated_desc) { + udma_reset_chan(uc, false); + udma_reset_rings(uc); + } if (uc->irq_num_ring > 0) { free_irq(uc->irq_num_ring, uc);