From: Rong Wang <[email protected]>
Chipidea puts ci information to drvdata, but this overwrites the drvdata
placed by EHCI core. EHCI core thinks drvdata is ehci_hcd. We can find this
from codes like ehci-sysfs.c:
static ssize_t show_companion(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct ehci_hcd *ehci;
ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
...
}
So overwritting drvdata from chipidea driver actually breaks a part of
functionalities of EHCI core.
Since the platform_data would not be accessed after the device is added
to system after the probe process, so it's safe to move to platform_data
here. This fix is not elegant but currently it is the quickest fix.
Signed-off-by: Rong Wang <[email protected]>
Signed-off-by: Barry Song <[email protected]>
---
drivers/usb/chipidea/core.c | 4 ++--
drivers/usb/chipidea/host.c | 1 -
drivers/usb/chipidea/otg_fsm.c | 14 +++++++-------
3 files changed, 9 insertions(+), 10 deletions(-)
diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index 3ad48e1..94e8d15 100644
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -811,7 +811,7 @@ static int ci_hdrc_probe(struct platform_device *pdev)
}
}
- platform_set_drvdata(pdev, ci);
+ dev->platform_data = ci;
ret = devm_request_irq(dev, ci->irq, ci_irq, IRQF_SHARED,
ci->platdata->name, ci);
if (ret)
@@ -844,7 +844,7 @@ deinit_phy:
static int ci_hdrc_remove(struct platform_device *pdev)
{
- struct ci_hdrc *ci = platform_get_drvdata(pdev);
+ struct ci_hdrc *ci = dev_get_platdata(&pdev->dev);
if (ci->supports_runtime_pm) {
pm_runtime_get_sync(&pdev->dev);
diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c
index 7161439..57d0a8b 100644
--- a/drivers/usb/chipidea/host.c
+++ b/drivers/usb/chipidea/host.c
@@ -102,7 +102,6 @@ static int host_start(struct ci_hdrc *ci)
if (!hcd)
return -ENOMEM;
- dev_set_drvdata(ci->dev, ci);
hcd->rsrc_start = ci->hw_bank.phys;
hcd->rsrc_len = ci->hw_bank.size;
hcd->regs = ci->hw_bank.abs;
diff --git a/drivers/usb/chipidea/otg_fsm.c b/drivers/usb/chipidea/otg_fsm.c
index 19d655a..3dc146d 100644
--- a/drivers/usb/chipidea/otg_fsm.c
+++ b/drivers/usb/chipidea/otg_fsm.c
@@ -36,7 +36,7 @@ get_a_bus_req(struct device *dev, struct device_attribute
*attr, char *buf)
{
char *next;
unsigned size, t;
- struct ci_hdrc *ci = dev_get_drvdata(dev);
+ struct ci_hdrc *ci = dev_get_platdata(dev);
next = buf;
size = PAGE_SIZE;
@@ -51,7 +51,7 @@ static ssize_t
set_a_bus_req(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
- struct ci_hdrc *ci = dev_get_drvdata(dev);
+ struct ci_hdrc *ci = dev_get_platdata(dev);
if (count > 2)
return -1;
@@ -80,7 +80,7 @@ get_a_bus_drop(struct device *dev, struct device_attribute
*attr, char *buf)
{
char *next;
unsigned size, t;
- struct ci_hdrc *ci = dev_get_drvdata(dev);
+ struct ci_hdrc *ci = dev_get_platdata(dev);
next = buf;
size = PAGE_SIZE;
@@ -95,7 +95,7 @@ static ssize_t
set_a_bus_drop(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
- struct ci_hdrc *ci = dev_get_drvdata(dev);
+ struct ci_hdrc *ci = dev_get_platdata(dev);
if (count > 2)
return -1;
@@ -121,7 +121,7 @@ get_b_bus_req(struct device *dev, struct device_attribute
*attr, char *buf)
{
char *next;
unsigned size, t;
- struct ci_hdrc *ci = dev_get_drvdata(dev);
+ struct ci_hdrc *ci = dev_get_platdata(dev);
next = buf;
size = PAGE_SIZE;
@@ -136,7 +136,7 @@ static ssize_t
set_b_bus_req(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
- struct ci_hdrc *ci = dev_get_drvdata(dev);
+ struct ci_hdrc *ci = dev_get_platdata(dev);
if (count > 2)
return -1;
@@ -158,7 +158,7 @@ static ssize_t
set_a_clr_err(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
- struct ci_hdrc *ci = dev_get_drvdata(dev);
+ struct ci_hdrc *ci = dev_get_platdata(dev);
if (count > 2)
return -1;
--
1.9.1
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