6.11-stable review patch. If anyone has any objections, please let me know.
------------------
From: Barnabás Czémán <barnabas.czeman@xxxxxxxxxxxxxx>
commit e02bfea4d7ef587bb285ad5825da4e1973ac8263 upstream.
Many qcom clock drivers do not have .width set. In that case value of
(p)->width - 1 will be negative which breaks clock tree. Fix this
by checking if width is zero, and pass 3 to GENMASK if that's the case.
Fixes: 1c3541145cbf ("clk: qcom: support for 2 bit PLL post divider")
Signed-off-by: Barnabás Czémán <barnabas.czeman@xxxxxxxxxxxxxx>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Reviewed-by: Christopher Obbard <christopher.obbard@xxxxxxxxxx>
Tested-by: Christopher Obbard <christopher.obbard@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20241006-fix-postdiv-mask-v3-1-160354980433@xxxxxxxxxxxxxx
Signed-off-by: Bjorn Andersson <andersson@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/clk/qcom/clk-alpha-pll.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/clk/qcom/clk-alpha-pll.c
+++ b/drivers/clk/qcom/clk-alpha-pll.c
@@ -40,7 +40,7 @@
#define PLL_USER_CTL(p) ((p)->offset + (p)->regs[PLL_OFF_USER_CTL])
# define PLL_POST_DIV_SHIFT 8
-# define PLL_POST_DIV_MASK(p) GENMASK((p)->width - 1, 0)
+# define PLL_POST_DIV_MASK(p) GENMASK((p)->width ? (p)->width - 1 : 3, 0)
# define PLL_ALPHA_MSB BIT(15)
# define PLL_ALPHA_EN BIT(24)
# define PLL_ALPHA_MODE BIT(25)
