[PATCH 5.19 065/717] dmaengine: qcom-adm: fix wrong sizeof config in slave_config

[Greg Kroah-Hartman]

From: Christian Marangi <ansuelsmth@xxxxxxxxx>

commit 7c8765308371be30f50c1b5b97618b731514b207 upstream.

Fix broken slave_config function that uncorrectly compare the
peripheral_size with the size of the config pointer instead of the size
of the config struct. This cause the crci value to be ignored and cause
a kernel panic on any slave that use adm driver.

To fix this, compare to the size of the struct and NOT the size of the
pointer.

Fixes: 03de6b273805 ("dmaengine: qcom-adm: stop abusing slave_id config")
Signed-off-by: Christian Marangi <ansuelsmth@xxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # v5.17+
Reviewed-by: Arnd Bergmann <arnd@xxxxxxxx>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220915204844.3838-1-ansuelsmth@xxxxxxxxx
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/dma/qcom/qcom_adm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/qcom/qcom_adm.c b/drivers/dma/qcom/qcom_adm.c
index facdacf8aede..c77d9de853de 100644
--- a/drivers/dma/qcom/qcom_adm.c
+++ b/drivers/dma/qcom/qcom_adm.c
@@ -494,7 +494,7 @@ static int adm_slave_config(struct dma_chan *chan, struct dma_slave_config *cfg)
 
 	spin_lock_irqsave(&achan->vc.lock, flag);
 	memcpy(&achan->slave, cfg, sizeof(struct dma_slave_config));
-	if (cfg->peripheral_size == sizeof(config))
+	if (cfg->peripheral_size == sizeof(*config))
 		achan->crci = config->crci;
 	spin_unlock_irqrestore(&achan->vc.lock, flag);
 
-- 
2.38.0