From: Christian Marangi ansuelsmth@gmail.com
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@gmail.com Cc: stable@vger.kernel.org # v5.17+ Reviewed-by: Arnd Bergmann arnd@arndb.de Reviewed-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org Link: https://lore.kernel.org/r/20220915204844.3838-1-ansuelsmth@gmail.com Signed-off-by: Vinod Koul vkoul@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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);