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authorAlexey Khoroshilov <khoroshilov@ispras.ru>2018-03-03 01:42:01 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-03-09 11:01:19 -0800
commitca7c22fc9e8d16b11b8be81254d5f59c5a9f5bcf (patch)
treecf6158cab52311a251c54d174490a1657a83edb5 /drivers/tty/serial/mxs-auart.c
parent7d6e2143bed7dd61dac3a00321292b36d63c2a2f (diff)
downloadlinux-ca7c22fc9e8d16b11b8be81254d5f59c5a9f5bcf.tar.gz
serial: mxs-auart: disable clks of Alphascale ASM9260
In case of Alphascale ASM9260 probe() enables s->clk and s->clk_ahb via mxs_get_clks(), but there is no disable of the clocks. The patch adds it to error paths and to mxs_auart_remove(). Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru> Fixes: 254da0d753fb ("serial: mxs-auart: add Alphascale ASM9260 support") Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/mxs-auart.c')
-rw-r--r--drivers/tty/serial/mxs-auart.c36
1 files changed, 23 insertions, 13 deletions
diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c
index caa8a41b6e71..76aa289652f7 100644
--- a/drivers/tty/serial/mxs-auart.c
+++ b/drivers/tty/serial/mxs-auart.c
@@ -1678,8 +1678,10 @@ static int mxs_auart_probe(struct platform_device *pdev)
return ret;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!r)
- return -ENXIO;
+ if (!r) {
+ ret = -ENXIO;
+ goto out_disable_clks;
+ }
s->port.mapbase = r->start;
s->port.membase = ioremap(r->start, resource_size(r));
@@ -1694,21 +1696,23 @@ static int mxs_auart_probe(struct platform_device *pdev)
s->mctrl_prev = 0;
irq = platform_get_irq(pdev, 0);
- if (irq < 0)
- return irq;
+ if (irq < 0) {
+ ret = irq;
+ goto out_disable_clks;
+ }
s->port.irq = irq;
ret = devm_request_irq(&pdev->dev, irq, mxs_auart_irq_handle, 0,
dev_name(&pdev->dev), s);
if (ret)
- return ret;
+ goto out_disable_clks;
platform_set_drvdata(pdev, s);
ret = mxs_auart_init_gpios(s, &pdev->dev);
if (ret) {
dev_err(&pdev->dev, "Failed to initialize GPIOs.\n");
- return ret;
+ goto out_disable_clks;
}
/*
@@ -1716,7 +1720,7 @@ static int mxs_auart_probe(struct platform_device *pdev)
*/
ret = mxs_auart_request_gpio_irq(s);
if (ret)
- return ret;
+ goto out_disable_clks;
auart_port[s->port.line] = s;
@@ -1724,7 +1728,7 @@ static int mxs_auart_probe(struct platform_device *pdev)
ret = uart_add_one_port(&auart_driver, &s->port);
if (ret)
- goto out_disable_clks_free_qpio_irq;
+ goto out_free_qpio_irq;
/* ASM9260 don't have version reg */
if (is_asm9260_auart(s)) {
@@ -1738,13 +1742,15 @@ static int mxs_auart_probe(struct platform_device *pdev)
return 0;
-out_disable_clks_free_qpio_irq:
- if (s->clk)
- clk_disable_unprepare(s->clk_ahb);
- if (s->clk_ahb)
- clk_disable_unprepare(s->clk_ahb);
+out_free_qpio_irq:
mxs_auart_free_gpio_irq(s);
auart_port[pdev->id] = NULL;
+
+out_disable_clks:
+ if (is_asm9260_auart(s)) {
+ clk_disable_unprepare(s->clk);
+ clk_disable_unprepare(s->clk_ahb);
+ }
return ret;
}
@@ -1755,6 +1761,10 @@ static int mxs_auart_remove(struct platform_device *pdev)
uart_remove_one_port(&auart_driver, &s->port);
auart_port[pdev->id] = NULL;
mxs_auart_free_gpio_irq(s);
+ if (is_asm9260_auart(s)) {
+ clk_disable_unprepare(s->clk);
+ clk_disable_unprepare(s->clk_ahb);
+ }
return 0;
}