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Message-Id: <1655072638-9103-1-git-send-email-khoroshilov@ispras.ru>
Date: Mon, 13 Jun 2022 01:23:58 +0300
From: Alexey Khoroshilov <khoroshilov@...ras.ru>
To: Vinod Koul <vkoul@...nel.org>,
Amelie Delaunay <amelie.delaunay@...com>
Cc: Alexey Khoroshilov <khoroshilov@...ras.ru>,
dmaengine@...r.kernel.org,
linux-stm32@...md-mailman.stormreply.com,
linux-kernel@...r.kernel.org, ldv-project@...uxtesting.org
Subject: [PATCH] dmaengine: stm32-mdma: Remove dead code in stm32_mdma_irq_handler()
Local variable chan is initialized by an address of element of chan array
that is part of stm32_mdma_device struct, so it does not make sense to
compare chan with NULL.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru>
Fixes: a4ffb13c8946 ("dmaengine: Add STM32 MDMA driver")
---
drivers/dma/stm32-mdma.c | 5 -----
1 file changed, 5 deletions(-)
diff --git a/drivers/dma/stm32-mdma.c b/drivers/dma/stm32-mdma.c
index caf0cce8f528..b11927ed4367 100644
--- a/drivers/dma/stm32-mdma.c
+++ b/drivers/dma/stm32-mdma.c
@@ -1328,12 +1328,7 @@ static irqreturn_t stm32_mdma_irq_handler(int irq, void *devid)
return IRQ_NONE;
}
id = __ffs(status);
-
chan = &dmadev->chan[id];
- if (!chan) {
- dev_warn(mdma2dev(dmadev), "MDMA channel not initialized\n");
- return IRQ_NONE;
- }
/* Handle interrupt for the channel */
spin_lock(&chan->vchan.lock);
--
2.7.4
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