[PATCH 6.1 272/417] serial: 8250_bcm2835aux: Restore clock error handling

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6.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Stefan Wahren <wahrenst@xxxxxxx>

commit 83e571f054cd742eb9a46d46ef05193904adf53f upstream.

The commit fcc446c8aa63 ("serial: 8250_bcm2835aux: Add ACPI support")
dropped the error handling for clock acquiring. But even an optional
clock needs this.

Fixes: fcc446c8aa63 ("serial: 8250_bcm2835aux: Add ACPI support")
Cc: stable <stable@xxxxxxxxxx>
Signed-off-by: Stefan Wahren <wahrenst@xxxxxxx>
Reviewed-by: Florian Fainelli <florian.fainelli@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20231220114334.4712-1-wahrenst@xxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/tty/serial/8250/8250_bcm2835aux.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/tty/serial/8250/8250_bcm2835aux.c
+++ b/drivers/tty/serial/8250/8250_bcm2835aux.c
@@ -119,6 +119,8 @@ static int bcm2835aux_serial_probe(struc
 
 	/* get the clock - this also enables the HW */
 	data->clk = devm_clk_get_optional(&pdev->dev, NULL);
+	if (IS_ERR(data->clk))
+		return dev_err_probe(&pdev->dev, PTR_ERR(data->clk), "could not get clk\n");
 
 	/* get the interrupt */
 	ret = platform_get_irq(pdev, 0);






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