6.6-stable review patch. If anyone has any objections, please let me know.
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From: Luca Weiss luca.weiss@fairphone.com
commit d4cdb196f182d2fbe336c968228be00d8c3fed05 upstream.
If a clk_rcg2 has a parent, it should also have parent_map defined, otherwise we'll get a NULL pointer dereference when calling clk_set_rate like the following:
[ 3.388105] Call trace: [ 3.390664] qcom_find_src_index+0x3c/0x70 (P) [ 3.395301] qcom_find_src_index+0x1c/0x70 (L) [ 3.399934] _freq_tbl_determine_rate+0x48/0x100 [ 3.404753] clk_rcg2_determine_rate+0x1c/0x28 [ 3.409387] clk_core_determine_round_nolock+0x58/0xe4 [ 3.421414] clk_core_round_rate_nolock+0x48/0xfc [ 3.432974] clk_core_round_rate_nolock+0xd0/0xfc [ 3.444483] clk_core_set_rate_nolock+0x8c/0x300 [ 3.455886] clk_set_rate+0x38/0x14c
Add the parent_map property for the clock where it's missing and also un-inline the parent_data as well to keep the matching parent_map and parent_data together.
Fixes: 837519775f1d ("clk: qcom: Add display clock controller driver for SM6350") Cc: stable@vger.kernel.org Signed-off-by: Luca Weiss luca.weiss@fairphone.com Reviewed-by: Konrad Dybcio konrad.dybcio@oss.qualcomm.com Link: https://lore.kernel.org/r/20241220-sm6350-parent_map-v1-2-64f3d04cb2eb@fairp... Signed-off-by: Bjorn Andersson andersson@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/clk/qcom/dispcc-sm6350.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-)
--- a/drivers/clk/qcom/dispcc-sm6350.c +++ b/drivers/clk/qcom/dispcc-sm6350.c @@ -187,13 +187,12 @@ static struct clk_rcg2 disp_cc_mdss_dp_a .cmd_rcgr = 0x1144, .mnd_width = 0, .hid_width = 5, + .parent_map = disp_cc_parent_map_6, .freq_tbl = ftbl_disp_cc_mdss_dp_aux_clk_src, .clkr.hw.init = &(struct clk_init_data){ .name = "disp_cc_mdss_dp_aux_clk_src", - .parent_data = &(const struct clk_parent_data){ - .fw_name = "bi_tcxo", - }, - .num_parents = 1, + .parent_data = disp_cc_parent_data_6, + .num_parents = ARRAY_SIZE(disp_cc_parent_data_6), .ops = &clk_rcg2_ops, }, };