From f7a03501b090f8c5f9ecb08420cda0b168667004 Mon Sep 17 00:00:00 2001
From: Alexey Khoroshilov <khoroshilov@ispras.ru>
Date: Mon, 13 Jun 2022 01:23:58 +0300
Subject: [PATCH] dmaengine: stm32-mdma: Remove dead code in stm32_mdma_irq_handler()
Git-commit: f7a03501b090f8c5f9ecb08420cda0b168667004
Patch-mainline: v6.0-rc1
References: git-fixes
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@ispras.ru>
Fixes: a4ffb13c8946 ("dmaengine: Add STM32 MDMA driver")
Reviewed-by: Amelie Delaunay <amelie.delaunay@foss.st.com>
Link: https://lore.kernel.org/r/1655072638-9103-1-git-send-email-khoroshilov@ispras.ru
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
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);
--
2.35.3