From aaf3bc0265744adbc2d364964ef409cf118d193d Mon Sep 17 00:00:00 2001 From: =?utf8?q?Cl=C3=A9ment=20Le=20Goffic?= Date: Wed, 17 Dec 2025 09:15:03 +0100 Subject: [PATCH] dmaengine: stm32-mdma: initialize m2m_hw_period and ccr to fix warnings MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit m2m_hw_period is initialized only when chan_config->m2m_hw is true. This triggers a warning: ‘m2m_hw_period’ may be used uninitialized [-Wmaybe-uninitialized] Although m2m_hw_period is only used when chan_config->m2m_hw is true and ignored otherwise, initialize it unconditionally to 0. ccr is initialized by stm32_mdma_set_xfer_param() when the sg list is not empty. This triggers a warning: ‘ccr’ may be used uninitialized [-Wmaybe-uninitialized] Indeed, it could be used uninitialized if the sg list is empty. Initialize it to 0. Signed-off-by: Clément Le Goffic Reviewed-by: Clément Le Goffic Signed-off-by: Amelie Delaunay Link: https://patch.msgid.link/20251217-mdma_warnings_fix-v2-1-340200e0bb55@foss.st.com Signed-off-by: Vinod Koul --- drivers/dma/stm32/stm32-mdma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma/stm32/stm32-mdma.c b/drivers/dma/stm32/stm32-mdma.c index 080c1c725216..b87d41b234df 100644 --- a/drivers/dma/stm32/stm32-mdma.c +++ b/drivers/dma/stm32/stm32-mdma.c @@ -731,7 +731,7 @@ static int stm32_mdma_setup_xfer(struct stm32_mdma_chan *chan, struct stm32_mdma_chan_config *chan_config = &chan->chan_config; struct scatterlist *sg; dma_addr_t src_addr, dst_addr; - u32 m2m_hw_period, ccr, ctcr, ctbr; + u32 m2m_hw_period = 0, ccr = 0, ctcr, ctbr; int i, ret = 0; if (chan_config->m2m_hw) -- 2.47.3