On 6/6/25 12:00, Qiu-ji Chen wrote:

Fixed a flag reuse bug in the mtk_cqdma_tx_status() function.

Fixes: 157ae5ffd76a ("dmaengine: mediatek: Fix a possible deadlock error in mtk_cqdma_tx_status()") Cc: stable@vger.kernel.org Reported-by: kernel test robot lkp@intel.com Closes: https://lore.kernel.org/oe-kbuild-all/202505270641.MStzJUfU-lkp@intel.com/ Signed-off-by: Qiu-ji Chen chenqiuji666@gmail.com

Reviewed-by: Eugen Hristev eugen.hristev@linaro.org

---

V2: Change the inner vc lock from spin_lock_irqsave() to spin_lock() Thanks Eugen Hristev for helpful suggestion.

---

drivers/dma/mediatek/mtk-cqdma.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/mediatek/mtk-cqdma.c b/drivers/dma/mediatek/mtk-cqdma.c index 47c8adfdc155..9f0c41ca7770 100644 --- a/drivers/dma/mediatek/mtk-cqdma.c +++ b/drivers/dma/mediatek/mtk-cqdma.c @@ -449,9 +449,9 @@ static enum dma_status mtk_cqdma_tx_status(struct dma_chan *c, return ret; spin_lock_irqsave(&cvc->pc->lock, flags);

• spin_lock_irqsave(&cvc->vc.lock, flags);

• spin_lock(&cvc->vc.lock); vd = mtk_cqdma_find_active_desc(c, cookie);

• spin_unlock_irqrestore(&cvc->vc.lock, flags);

• spin_unlock(&cvc->vc.lock); spin_unlock_irqrestore(&cvc->pc->lock, flags);

if (vd) {