linux-kernel - [PATCH v2 -next 1/7] dmaengine: xilinx_dma: Remove desc_callback

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>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1571150904-3988-2-git-send-email-radhey.shyam.pandey@xilinx.com>
Date:   Tue, 15 Oct 2019 20:18:18 +0530
From:   Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
To:     vkoul@...nel.org, dan.j.williams@...el.com,
        michal.simek@...inx.com, nick.graumann@...il.com,
        andrea.merello@...il.com, appana.durga.rao@...inx.com,
        mcgrof@...nel.org
Cc:     dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
        Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
Subject: [PATCH v2 -next 1/7] dmaengine: xilinx_dma: Remove desc_callback_valid check

In descriptor cleanup the call to desc_callback_valid can be safely
removed as both callback pointers i.e callback_result and callback
are anyway checked in invoke(). There is no much benefit in having
redundant checks.

Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
Signed-off-by: Nicholas Graumann <nick.graumann@...il.com>
Reviewed-by: Appana Durga Kedareswara rao <appana.durga.rao@...inx.com>
---
Changes for v2:
None
---
 drivers/dma/xilinx/xilinx_dma.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
index 440f2ce..a3f8a2c 100644
--- a/drivers/dma/xilinx/xilinx_dma.c
+++ b/drivers/dma/xilinx/xilinx_dma.c
@@ -835,11 +835,9 @@ static void xilinx_dma_chan_desc_cleanup(struct xilinx_dma_chan *chan)
 
 		/* Run the link descriptor callback function */
 		dmaengine_desc_get_callback(&desc->async_tx, &cb);
-		if (dmaengine_desc_callback_valid(&cb)) {
-			spin_unlock_irqrestore(&chan->lock, flags);
-			dmaengine_desc_callback_invoke(&cb, NULL);
-			spin_lock_irqsave(&chan->lock, flags);
-		}
+		spin_unlock_irqrestore(&chan->lock, flags);
+		dmaengine_desc_callback_invoke(&cb, NULL);
+		spin_lock_irqsave(&chan->lock, flags);
 
 		/* Run any dependencies, then free the descriptor */
 		dma_run_dependencies(&desc->async_tx);
-- 
2.7.4