On Dienstag, 27. Juni 2017 04:17:46 CEST Stephen Boyd wrote:
> After commit 7f1d4e58dabb ("spmi: pmic-arb: optimize table
> lookups") we always need the ppid_to_apid table regardless of the
> version of pmic arbiter we have. Otherwise, we will try to deref
> the array when we don't allocate it on v2 hardware like the
> msm8974 SoCs.
>
> Cc: Abhijeet Dharmapurikar <adharmap@xxxxxxxxxxxxxx>
> Cc: Kiran Gunda <kgunda@xxxxxxxxxxxxxx>
> Fixes: 7f1d4e58dabb ("spmi: pmic-arb: optimize table lookups")
> Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
> Reviewed-by: Kiran Gunda <kgunda@xxxxxxxxxxxxxx>
> ---
> drivers/spmi/spmi-pmic-arb.c | 17 +++++++----------
> 1 file changed, 7 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
> index 2afe3597982e..f4b7a98a7913 100644
> --- a/drivers/spmi/spmi-pmic-arb.c
> +++ b/drivers/spmi/spmi-pmic-arb.c
> @@ -134,7 +134,6 @@ struct apid_data {
> * @spmic: SPMI controller object
> * @ver_ops: version dependent operations.
> * @ppid_to_apid in-memory copy of PPID -> channel (APID) mapping table.
> - * v2 only.
> */
> struct spmi_pmic_arb {
> void __iomem *rd_base;
> @@ -1016,6 +1015,13 @@ static int spmi_pmic_arb_probe(struct platform_device
> *pdev) goto err_put_ctrl;
> }
>
> + pa->ppid_to_apid = devm_kcalloc(&ctrl->dev, PMIC_ARB_MAX_PPID,
> + sizeof(*pa->ppid_to_apid), GFP_KERNEL);
> + if (!pa->ppid_to_apid) {
> + err = -ENOMEM;
> + goto err_put_ctrl;
> + }
> +
> hw_ver = readl_relaxed(core + PMIC_ARB_VERSION);
>
> if (hw_ver < PMIC_ARB_VERSION_V2_MIN) {
> @@ -1048,15 +1054,6 @@ static int spmi_pmic_arb_probe(struct platform_device
> *pdev) err = PTR_ERR(pa->wr_base);
> goto err_put_ctrl;
> }
> -
> - pa->ppid_to_apid = devm_kcalloc(&ctrl->dev,
> - PMIC_ARB_MAX_PPID,
> - sizeof(*pa->ppid_to_apid),
> - GFP_KERNEL);
> - if (!pa->ppid_to_apid) {
> - err = -ENOMEM;
> - goto err_put_ctrl;
> - }
> }
>
> dev_info(&ctrl->dev, "PMIC arbiter version %s (0x%x)\n",
Tested-by: Luca Weiss <luca@xxxxxxxxx>
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