When working on another SATA driver that uses libahci_platform, I
noticed 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.
Signed-off-by: Brian Norris <computersforpeace@xxxxxxxxx>
Cc: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxx>
Cc: Maxime Coquelin <maxime.coquelin@xxxxxx>
Cc: Patrice Chotard <patrice.chotard@xxxxxx>
---
This is ONLY compile tested; I don't have hardware to run. This looks like it
could have ramifications on suspend/resume support, and hot device removal
(e.g., sysfs unbind), so it might qualify as -stable, if someone can test it
drivers/ata/ahci_st.c | 25 ++++++++++++++-----------
1 file changed, 14 insertions(+), 11 deletions(-)
diff --git a/drivers/ata/ahci_st.c b/drivers/ata/ahci_st.c
index bc971af262e7..2bd2375c2ab1 100644
--- a/drivers/ata/ahci_st.c
+++ b/drivers/ata/ahci_st.c
@@ -37,7 +37,6 @@ struct st_ahci_drv_data {
struct reset_control *pwr;
struct reset_control *sw_rst;
struct reset_control *pwr_rst;
- struct ahci_host_priv *hpriv;
};
static void st_ahci_configure_oob(void __iomem *mmio)
@@ -57,7 +56,9 @@ static void st_ahci_configure_oob(void __iomem *mmio)
static int st_ahci_deassert_resets(struct device *dev)
{
- struct st_ahci_drv_data *drv_data = dev_get_drvdata(dev);
+ struct ata_host *host = dev_get_drvdata(dev);
+ struct ahci_host_priv *hpriv = host->private_data;
+ struct st_ahci_drv_data *drv_data = hpriv->plat_data;
int err;
if (drv_data->pwr) {
@@ -68,7 +69,7 @@ static int st_ahci_deassert_resets(struct device *dev)
}
}
- st_ahci_configure_oob(drv_data->hpriv->mmio);
+ st_ahci_configure_oob(hpriv->mmio);
if (drv_data->sw_rst) {
err = reset_control_deassert(drv_data->sw_rst);
@@ -92,8 +93,8 @@ static int st_ahci_deassert_resets(struct device *dev)
static void st_ahci_host_stop(struct ata_host *host)
{
struct ahci_host_priv *hpriv = host->private_data;
+ struct st_ahci_drv_data *drv_data = hpriv->plat_data;
struct device *dev = host->dev;
- struct st_ahci_drv_data *drv_data = dev_get_drvdata(dev);
int err;
if (drv_data->pwr) {
@@ -107,7 +108,9 @@ static void st_ahci_host_stop(struct ata_host *host)
static int st_ahci_probe_resets(struct platform_device *pdev)
{
- struct st_ahci_drv_data *drv_data = platform_get_drvdata(pdev);
+ struct ata_host *host = dev_get_drvdata(&pdev->dev);
+ struct ahci_host_priv *hpriv = host->private_data;
+ struct st_ahci_drv_data *drv_data = hpriv->plat_data;
drv_data->pwr = devm_reset_control_get(&pdev->dev, "pwr-dwn");
if (IS_ERR(drv_data->pwr)) {
@@ -161,8 +164,7 @@ static int st_ahci_probe(struct platform_device *pdev)
hpriv = ahci_platform_get_resources(pdev);
if (IS_ERR(hpriv))
return PTR_ERR(hpriv);
-
- drv_data->hpriv = hpriv;
+ hpriv->plat_data = drv_data;
err = st_ahci_probe_resets(pdev);
if (err)
@@ -185,8 +187,9 @@ static int st_ahci_probe(struct platform_device *pdev)
#ifdef CONFIG_PM_SLEEP
static int st_ahci_suspend(struct device *dev)
{
- struct st_ahci_drv_data *drv_data = dev_get_drvdata(dev);
- struct ahci_host_priv *hpriv = drv_data->hpriv;
+ struct ata_host *host = dev_get_drvdata(dev);
+ struct ahci_host_priv *hpriv = host->private_data;
+ struct st_ahci_drv_data *drv_data = hpriv->plat_data;
int err;
err = ahci_platform_suspend_host(dev);
@@ -208,8 +211,8 @@ static int st_ahci_suspend(struct device *dev)
static int st_ahci_resume(struct device *dev)
{
- struct st_ahci_drv_data *drv_data = dev_get_drvdata(dev);
- struct ahci_host_priv *hpriv = drv_data->hpriv;
+ struct ata_host *host = dev_get_drvdata(dev);
+ struct ahci_host_priv *hpriv = host->private_data;
int err;
err = ahci_platform_enable_resources(hpriv);
--
1.9.1
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