forked from luck/tmp_suning_uos_patched
ata: ahci_st: fixup layering violations / drvdata errors
Brian noticed while working on another SATA driver that uses libahci_platform, an error in this driver; it tries to the the driver data for its device, while libata also thinks it can set the driver data. See: ahci_platform_init_host() -> ata_host_alloc_pinfo() -> ata_host_alloc() -> dev_set_drvdata() So instead of sticking the IP-specific platform data into drvdata, let's use the plat_data variable that is reserved for this use. Addtionally plat_data isn't set until ahci_platform_init_host() has been called further down in probe(). So re-work the st_ahci_probe_resets and st_ahci_deassert_resets functions to take ahci_host_priv *hpriv as a parameter. Signed-off-by: Peter Griffin <peter.griffin@linaro.org> Suggested-by: Brian Norris <computersforpeace@gmail.com> Cc: Srinivas Kandagatla <srinivas.kandagatla@gmail.com> Cc: Maxime Coquelin <maxime.coquelin@st.com> Cc: Patrice Chotard <patrice.chotard@st.com> Signed-off-by: Tejun Heo <tj@kernel.org>
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@ -37,7 +37,6 @@ struct st_ahci_drv_data {
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struct reset_control *pwr;
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struct reset_control *sw_rst;
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struct reset_control *pwr_rst;
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struct ahci_host_priv *hpriv;
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};
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static void st_ahci_configure_oob(void __iomem *mmio)
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@ -55,9 +54,10 @@ static void st_ahci_configure_oob(void __iomem *mmio)
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writel(new_val, mmio + ST_AHCI_OOBR);
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}
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static int st_ahci_deassert_resets(struct device *dev)
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static int st_ahci_deassert_resets(struct ahci_host_priv *hpriv,
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struct device *dev)
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{
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struct st_ahci_drv_data *drv_data = dev_get_drvdata(dev);
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struct st_ahci_drv_data *drv_data = hpriv->plat_data;
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int err;
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if (drv_data->pwr) {
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@ -90,8 +90,8 @@ static int st_ahci_deassert_resets(struct device *dev)
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static void st_ahci_host_stop(struct ata_host *host)
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{
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struct ahci_host_priv *hpriv = host->private_data;
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struct st_ahci_drv_data *drv_data = hpriv->plat_data;
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struct device *dev = host->dev;
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struct st_ahci_drv_data *drv_data = dev_get_drvdata(dev);
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int err;
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if (drv_data->pwr) {
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@ -103,29 +103,30 @@ static void st_ahci_host_stop(struct ata_host *host)
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ahci_platform_disable_resources(hpriv);
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}
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static int st_ahci_probe_resets(struct platform_device *pdev)
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static int st_ahci_probe_resets(struct ahci_host_priv *hpriv,
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struct device *dev)
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{
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struct st_ahci_drv_data *drv_data = platform_get_drvdata(pdev);
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struct st_ahci_drv_data *drv_data = hpriv->plat_data;
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drv_data->pwr = devm_reset_control_get(&pdev->dev, "pwr-dwn");
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drv_data->pwr = devm_reset_control_get(dev, "pwr-dwn");
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if (IS_ERR(drv_data->pwr)) {
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dev_info(&pdev->dev, "power reset control not defined\n");
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dev_info(dev, "power reset control not defined\n");
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drv_data->pwr = NULL;
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}
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drv_data->sw_rst = devm_reset_control_get(&pdev->dev, "sw-rst");
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drv_data->sw_rst = devm_reset_control_get(dev, "sw-rst");
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if (IS_ERR(drv_data->sw_rst)) {
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dev_info(&pdev->dev, "soft reset control not defined\n");
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dev_info(dev, "soft reset control not defined\n");
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drv_data->sw_rst = NULL;
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}
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drv_data->pwr_rst = devm_reset_control_get(&pdev->dev, "pwr-rst");
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drv_data->pwr_rst = devm_reset_control_get(dev, "pwr-rst");
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if (IS_ERR(drv_data->pwr_rst)) {
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dev_dbg(&pdev->dev, "power soft reset control not defined\n");
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dev_dbg(dev, "power soft reset control not defined\n");
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drv_data->pwr_rst = NULL;
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}
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return st_ahci_deassert_resets(&pdev->dev);
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return st_ahci_deassert_resets(hpriv, dev);
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}
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static struct ata_port_operations st_ahci_port_ops = {
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@ -154,15 +155,12 @@ static int st_ahci_probe(struct platform_device *pdev)
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if (!drv_data)
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return -ENOMEM;
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platform_set_drvdata(pdev, drv_data);
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hpriv = ahci_platform_get_resources(pdev);
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if (IS_ERR(hpriv))
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return PTR_ERR(hpriv);
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hpriv->plat_data = drv_data;
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drv_data->hpriv = hpriv;
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err = st_ahci_probe_resets(pdev);
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err = st_ahci_probe_resets(hpriv, &pdev->dev);
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if (err)
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return err;
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@ -170,7 +168,7 @@ static int st_ahci_probe(struct platform_device *pdev)
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if (err)
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return err;
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st_ahci_configure_oob(drv_data->hpriv->mmio);
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st_ahci_configure_oob(hpriv->mmio);
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err = ahci_platform_init_host(pdev, hpriv, &st_ahci_port_info,
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&ahci_platform_sht);
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@ -185,8 +183,9 @@ static int st_ahci_probe(struct platform_device *pdev)
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#ifdef CONFIG_PM_SLEEP
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static int st_ahci_suspend(struct device *dev)
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{
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struct st_ahci_drv_data *drv_data = dev_get_drvdata(dev);
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struct ahci_host_priv *hpriv = drv_data->hpriv;
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struct ata_host *host = dev_get_drvdata(dev);
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struct ahci_host_priv *hpriv = host->private_data;
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struct st_ahci_drv_data *drv_data = hpriv->plat_data;
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int err;
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err = ahci_platform_suspend_host(dev);
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@ -208,21 +207,21 @@ static int st_ahci_suspend(struct device *dev)
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static int st_ahci_resume(struct device *dev)
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{
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struct st_ahci_drv_data *drv_data = dev_get_drvdata(dev);
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struct ahci_host_priv *hpriv = drv_data->hpriv;
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struct ata_host *host = dev_get_drvdata(dev);
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struct ahci_host_priv *hpriv = host->private_data;
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int err;
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err = ahci_platform_enable_resources(hpriv);
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if (err)
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return err;
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err = st_ahci_deassert_resets(dev);
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err = st_ahci_deassert_resets(hpriv, dev);
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if (err) {
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ahci_platform_disable_resources(hpriv);
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return err;
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}
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st_ahci_configure_oob(drv_data->hpriv->mmio);
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st_ahci_configure_oob(hpriv->mmio);
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return ahci_platform_resume_host(dev);
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}
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