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This triggers a warning: =E2=80=98m2m_hw_period=E2=80=99 may be used uninitialized [-Wmaybe-uninitia= lized] 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: =E2=80=98ccr=E2=80=99 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: Cl=C3=A9ment Le Goffic Reviewed-by: Cl=C3=A9ment Le Goffic Signed-off-by: Amelie Delaunay --- Changes in v2: - Added code-review trailer - Rebased on top of v6.19-rc1=20 - Link to v1: https://lore.kernel.org/r/20251030-mdma_warnings_fix-v1-1-987= f67c75794@foss.st.com --- 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 =3D &chan->chan_config; struct scatterlist *sg; dma_addr_t src_addr, dst_addr; - u32 m2m_hw_period, ccr, ctcr, ctbr; + u32 m2m_hw_period =3D 0, ccr =3D 0, ctcr, ctbr; int i, ret =3D 0; =20 if (chan_config->m2m_hw) --- base-commit: 8f0b4cce4481fb22653697cced8d0d04027cb1e8 change-id: 20251030-mdma_warnings_fix-df4b3d1405ed Best regards, --=20 Amelie Delaunay