lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [day] [month] [year] [list]
Date:   Fri,  7 Oct 2016 01:25:14 -0400
From:   Sinan Kaya <okaya@...eaurora.org>
To:     dmaengine@...r.kernel.org, timur@...eaurora.org,
        devicetree@...r.kernel.org, cov@...eaurora.org,
        vinod.koul@...el.com, jcm@...hat.com
Cc:     agross@...eaurora.org, arnd@...db.de,
        linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Sinan Kaya <okaya@...eaurora.org>,
        Dan Williams <dan.j.williams@...el.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH V5 09/10] dmaengine: qcom_hidma: break completion processing on error

We try to consume as much successful transfers as possible. Now that we
support MSI interrupts, an error interrupt might be observed by another
processor while we are finishing the successful ones.

Try to abort successful processing if this is the case.

Signed-off-by: Sinan Kaya <okaya@...eaurora.org>
---
 drivers/dma/qcom/hidma_ll.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/dma/qcom/hidma_ll.c b/drivers/dma/qcom/hidma_ll.c
index c4e8b64..aa76ec1 100644
--- a/drivers/dma/qcom/hidma_ll.c
+++ b/drivers/dma/qcom/hidma_ll.c
@@ -291,6 +291,13 @@ static int hidma_handle_tre_completion(struct hidma_lldev *lldev)
 		evre_write_off =
 		    readl_relaxed(lldev->evca + HIDMA_EVCA_WRITE_PTR_REG);
 		num_completed++;
+
+		/*
+		 * An error interrupt might have arrived while we are processing
+		 * the completed interrupt.
+		 */
+		if (!hidma_ll_isenabled(lldev))
+			break;
 	}
 
 	if (num_completed) {
-- 
1.9.1

Powered by blists - more mailing lists