4.19-stable review patch. If anyone has any objections, please let me know.
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From: Hugo Villeneuve hvilleneuve@dimonoff.com
commit 0419373333c2f2024966d36261fd82a453281e80 upstream.
If regmap_read() returns a non-zero value, the 'val' variable can be left uninitialized.
Clear it before calling regmap_read() to make sure we properly detect the clock ready bit.
Fixes: 4cf9a888fd3c ("serial: max310x: Check the clock readiness") Cc: stable@vger.kernel.org Signed-off-by: Hugo Villeneuve hvilleneuve@dimonoff.com Link: https://lore.kernel.org/r/20240116213001.3691629-2-hugo@hugovil.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/tty/serial/max310x.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/tty/serial/max310x.c +++ b/drivers/tty/serial/max310x.c @@ -600,7 +600,7 @@ static int max310x_set_ref_clk(struct de
/* Wait for crystal */ if (xtal) { - unsigned int val; + unsigned int val = 0; msleep(10); regmap_read(s->regmap, MAX310X_STS_IRQSTS_REG, &val); if (!(val & MAX310X_STS_CLKREADY_BIT)) {