2014-09-10 20:54 GMT+09:00 Dolev Raviv <dra...@codeaurora.org>:
> +static int ufshcd_config_pwr_mode(struct ufs_hba *hba,
> + struct ufs_pa_layer_attr *desired_pwr_mode)
> +{
> + struct ufs_pa_layer_attr final_params = { 0 };
> + int ret;
> +
> + if (hba->vops->pwr_change_notify)
If hba->vops is null as no vendor specific callbacks, this causes
a null pointer dereference. So null check for hba->vops is also needed
just like other callbacks.
> + hba->vops->pwr_change_notify(hba,
> + PRE_CHANGE, desired_pwr_mode, &final_params);
> + else
> + memcpy(&final_params, desired_pwr_mode, sizeof(final_params));
> +
> /*
> * Configure attributes for power mode change with below.
> * - PA_RXGEAR, PA_ACTIVERXDATALANES, PA_RXTERMINATION,
> * - PA_TXGEAR, PA_ACTIVETXDATALANES, PA_TXTERMINATION,
> * - PA_HSSERIES
> */
> - ufshcd_dme_set(hba, UIC_ARG_MIB(PA_RXGEAR), gear[RX]);
> - ufshcd_dme_set(hba, UIC_ARG_MIB(PA_ACTIVERXDATALANES), lanes[RX]);
> - if (pwr[RX] == FASTAUTO_MODE)
> + ufshcd_dme_set(hba, UIC_ARG_MIB(PA_RXGEAR), final_params.gear_rx);
> + ufshcd_dme_set(hba, UIC_ARG_MIB(PA_ACTIVERXDATALANES),
> + final_params.lane_rx);
> + if (final_params.pwr_rx == FASTAUTO_MODE ||
> + final_params.pwr_rx == FAST_MODE)
> ufshcd_dme_set(hba, UIC_ARG_MIB(PA_RXTERMINATION), TRUE);
> + else
> + ufshcd_dme_set(hba, UIC_ARG_MIB(PA_RXTERMINATION), FALSE);
>
> - ufshcd_dme_set(hba, UIC_ARG_MIB(PA_TXGEAR), gear[TX]);
> - ufshcd_dme_set(hba, UIC_ARG_MIB(PA_ACTIVETXDATALANES), lanes[TX]);
> - if (pwr[TX] == FASTAUTO_MODE)
> + ufshcd_dme_set(hba, UIC_ARG_MIB(PA_TXGEAR), final_params.gear_tx);
> + ufshcd_dme_set(hba, UIC_ARG_MIB(PA_ACTIVETXDATALANES),
> + final_params.lane_tx);
> + if (final_params.pwr_tx == FASTAUTO_MODE ||
> + final_params.pwr_tx == FAST_MODE)
> ufshcd_dme_set(hba, UIC_ARG_MIB(PA_TXTERMINATION), TRUE);
> -
> - if (pwr[RX] == FASTAUTO_MODE || pwr[TX] == FASTAUTO_MODE)
> - ufshcd_dme_set(hba, UIC_ARG_MIB(PA_HSSERIES), PA_HS_MODE_B);
> -
> - ret = ufshcd_uic_change_pwr_mode(hba, pwr[RX] << 4 | pwr[TX]);
> - if (ret)
> + else
> + ufshcd_dme_set(hba, UIC_ARG_MIB(PA_TXTERMINATION), FALSE);
> +
> + if ((final_params.pwr_rx == FASTAUTO_MODE ||
> + final_params.pwr_tx == FASTAUTO_MODE ||
> + final_params.pwr_rx == FAST_MODE ||
> + final_params.pwr_tx == FAST_MODE) &&
> + final_params.hs_rate == PA_HS_MODE_B)
> + ufshcd_dme_set(hba, UIC_ARG_MIB(PA_HSSERIES),
> + final_params.hs_rate);
> +
> + ret = ufshcd_uic_change_pwr_mode(hba, final_params.pwr_rx << 4
> + | final_params.pwr_tx);
> + if (ret) {
> dev_err(hba->dev,
> "pwr_mode: power mode change failed %d\n", ret);
> + } else {
> + if (hba->vops->pwr_change_notify)
Ditto.
> + hba->vops->pwr_change_notify(hba,
> + POST_CHANGE, NULL, &final_params);
> +
> + memcpy(&hba->pwr_info, &final_params, sizeof(final_params));
> + }
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