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usb: renesas_usbhs: Avoid to write platform_data's value

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The very old commit 482982062f ("usb: gadget: renesas_usbhs:
bugfix: don't modify platform data") changed to use copied whole
structures values to fix the "hung-up" issue. However, we also
can fix the issue if the driver copies the get_vbus function
pointer to the driver's value.

So, this patch adds get_vbus member into struct usbhs_mod_info and
use the pointer instead of struct renesas_usbhs_platform_callback.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yoshihiro Shimoda 2019-06-25 14:38:48 +09:00 committed by Greg Kroah-Hartman
parent edcf2b2c66
commit ccc3264c24
4 changed files with 21 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/usb/renesas_usbhs/common.c
View File

@ -448,7 +448,7 @@ static void usbhsc_hotplug(struct usbhs_priv *priv)
/*
* get vbus status from platform
*/
enable = usbhs_platform_call(priv, get_vbus, pdev);
enable = usbhs_mod_info_call(priv, get_vbus, pdev);
/*
* get id from platform
@ -809,6 +809,8 @@ static int usbhs_probe(struct platform_device *pdev)
if (!usbhs_get_dparam(priv, runtime_pwctrl)) {
usbhsc_power_ctrl(priv, 1);
usbhs_mod_autonomy_mode(priv);
} else {
usbhs_mod_non_autonomy_mode(priv);
}
/*

11
drivers/usb/renesas_usbhs/mod.c
View File

@ -42,12 +42,19 @@ void usbhs_mod_autonomy_mode(struct usbhs_priv *priv)
{
struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
info->irq_vbus = usbhsm_autonomy_irq_vbus;
priv->pfunc.get_vbus = usbhsm_autonomy_get_vbus;
info->irq_vbus = usbhsm_autonomy_irq_vbus;
info->get_vbus = usbhsm_autonomy_get_vbus;
usbhs_irq_callback_update(priv, NULL);
}
void usbhs_mod_non_autonomy_mode(struct usbhs_priv *priv)
{
struct usbhs_mod_info *info = usbhs_priv_to_modinfo(priv);
info->get_vbus = priv->pfunc.get_vbus;
}
/*
* host / gadget functions
*

7
drivers/usb/renesas_usbhs/mod.h
View File

@ -93,6 +93,12 @@ struct usbhs_mod_info {
*/
int (*irq_vbus)(struct usbhs_priv *priv,
struct usbhs_irq_state *irq_state);
/*
* This function will be used on any gadget mode. To simplify the code,
* this member is in here.
*/
int (*get_vbus)(struct platform_device *pdev);
};
/*
@ -107,6 +113,7 @@ int usbhs_mod_probe(struct usbhs_priv *priv);
void usbhs_mod_remove(struct usbhs_priv *priv);
void usbhs_mod_autonomy_mode(struct usbhs_priv *priv);
void usbhs_mod_non_autonomy_mode(struct usbhs_priv *priv);
/*
* status functions

4
drivers/usb/renesas_usbhs/mod_gadget.c
View File

@ -915,8 +915,8 @@ static void usbhs_mod_phy_mode(struct usbhs_priv *priv)
{
struct usbhs_mod_info *info = &priv->mod_info;
info->irq_vbus = NULL;
priv->pfunc.get_vbus = usbhsm_phy_get_vbus;
info->irq_vbus = NULL;
info->get_vbus = usbhsm_phy_get_vbus;
usbhs_irq_callback_update(priv, NULL);
}