| Message ID | 20230427181916.2983697-2-opendmb@gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | serial: 8250_bcm7271: Fix clock handling | expand |
On 4/27/23 11:19, Doug Berger wrote: > The sw_baud clock must be disabled when the device driver is not > connected to the device. This now occurs when probe fails and > upon remove. > > Fixes: 41a469482de2 ("serial: 8250: Add new 8250-core based Broadcom STB driver") > Reported-by: XuDong Liu <m202071377@hust.edu.cn> > Link: https://lore.kernel.org/lkml/20230424125100.4783-1-m202071377@hust.edu.cn/ > Signed-off-by: Doug Berger <opendmb@gmail.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com>
diff --git a/drivers/tty/serial/8250/8250_bcm7271.c b/drivers/tty/serial/8250/8250_bcm7271.c index f801b1f5b46c..90ee7bc12f77 100644 --- a/drivers/tty/serial/8250/8250_bcm7271.c +++ b/drivers/tty/serial/8250/8250_bcm7271.c @@ -1032,7 +1032,7 @@ static int brcmuart_probe(struct platform_device *pdev) if (clk_rate == 0) { dev_err(dev, "clock-frequency or clk not defined\n"); ret = -EINVAL; - goto release_dma; + goto err_clk_disable; } dev_dbg(dev, "DMA is %senabled\n", priv->dma_enabled ? "" : "not "); @@ -1119,6 +1119,8 @@ static int brcmuart_probe(struct platform_device *pdev) serial8250_unregister_port(priv->line); err: brcmuart_free_bufs(dev, priv); +err_clk_disable: + clk_disable_unprepare(baud_mux_clk); release_dma: if (priv->dma_enabled) brcmuart_arbitration(priv, 0); @@ -1133,6 +1135,7 @@ static int brcmuart_remove(struct platform_device *pdev) hrtimer_cancel(&priv->hrt); serial8250_unregister_port(priv->line); brcmuart_free_bufs(&pdev->dev, priv); + clk_disable_unprepare(priv->baud_mux_clk); if (priv->dma_enabled) brcmuart_arbitration(priv, 0); return 0;
The sw_baud clock must be disabled when the device driver is not connected to the device. This now occurs when probe fails and upon remove. Fixes: 41a469482de2 ("serial: 8250: Add new 8250-core based Broadcom STB driver") Reported-by: XuDong Liu <m202071377@hust.edu.cn> Link: https://lore.kernel.org/lkml/20230424125100.4783-1-m202071377@hust.edu.cn/ Signed-off-by: Doug Berger <opendmb@gmail.com> --- drivers/tty/serial/8250/8250_bcm7271.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)