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dmaengine: stm32-mdma: Remove dead code in stm32_mdma_irq_handler()

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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>
This commit is contained in:
Alexey Khoroshilov 2022-06-13 01:23:58 +03:00 committed by Vinod Koul
parent 5dc8638872
commit f7a03501b0
1 changed files with 0 additions and 5 deletions
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5
drivers/dma/stm32-mdma.c
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@ -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);