Commit 712d8e(fixes pm_runtime calls while atomic by using a work
queue. musb pm_runtime_get_sync call happens in interrupt context
on cable attach case. That can result in re-enabling the interrupts and
cause side affect. To avoid this deferred processing is used)
While the issue and the work queue implementation is specific to omap
(omap2430.c), the work_struct is defined as a member of struct musb
(musb_core.h). Hence moved the work_struct from musb_core to omap
glue.
Cc: Vikram Pandita <vikram.pandita@xxxxxx>
Signed-off-by: Kishon Vijay Abraham I <kishon@xxxxxx>
---
drivers/usb/musb/musb_core.h | 2 --
drivers/usb/musb/omap2430.c | 24 +++++++++++++++---------
2 files changed, 15 insertions(+), 11 deletions(-)
diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h
index f4a40f0..dbcdeea 100644
--- a/drivers/usb/musb/musb_core.h
+++ b/drivers/usb/musb/musb_core.h
@@ -327,7 +327,6 @@ struct musb {
irqreturn_t (*isr)(int, void *);
struct work_struct irq_work;
- struct work_struct otg_notifier_work;
u16 hwvers;
/* this hub status bit is reserved by USB 2.0 and not seen by usbcore */
@@ -373,7 +372,6 @@ struct musb {
u16 int_tx;
struct usb_phy *xceiv;
- u8 xceiv_event;
int nIrq;
unsigned irq_wake:1;
diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index e279cf3..f40c805 100644
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -41,6 +41,8 @@
struct omap2430_glue {
struct device *dev;
struct platform_device *musb;
+ u8 xceiv_event;
+ struct work_struct omap_musb_mailbox_work;
};
#define glue_to_musb(g) platform_get_drvdata(g->musb)
@@ -226,22 +228,26 @@ static inline void omap2430_low_level_init(struct musb *musb)
static int musb_otg_notifications(struct notifier_block *nb,
unsigned long event, void *unused)
{
- struct musb *musb = container_of(nb, struct musb, nb);
+ struct musb *musb = container_of(nb, struct musb, nb);
+ struct device *dev = musb->controller;
+ struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
- musb->xceiv_event = event;
- schedule_work(&musb->otg_notifier_work);
+ glue->xceiv_event = event;
+ schedule_work(&glue->omap_musb_mailbox_work);
return NOTIFY_OK;
}
-static void musb_otg_notifier_work(struct work_struct *data_notifier_work)
+static void omap_musb_mailbox_work(struct work_struct *data_notifier_work)
{
- struct musb *musb = container_of(data_notifier_work, struct musb, otg_notifier_work);
+ struct omap2430_glue *glue = container_of(data_notifier_work,
+ struct omap2430_glue, omap_musb_mailbox_work);
+ struct musb *musb = glue_to_musb(glue);
struct device *dev = musb->controller;
struct musb_hdrc_platform_data *pdata = dev->platform_data;
struct omap_musb_board_data *data = pdata->board_data;
- switch (musb->xceiv_event) {
+ switch (glue->xceiv_event) {
case USB_EVENT_ID:
dev_dbg(musb->controller, "ID GND\n");
@@ -298,8 +304,6 @@ static int omap2430_musb_init(struct musb *musb)
return -ENODEV;
}
- INIT_WORK(&musb->otg_notifier_work, musb_otg_notifier_work);
-
status = pm_runtime_get_sync(dev);
if (status < 0) {
dev_err(dev, "pm_runtime_get_sync FAILED %d\n", status);
@@ -388,7 +392,6 @@ static void omap2430_musb_disable(struct musb *musb)
static int omap2430_musb_exit(struct musb *musb)
{
del_timer_sync(&musb_idle_timer);
- cancel_work_sync(&musb->otg_notifier_work);
omap2430_low_level_exit(musb);
usb_put_phy(musb->xceiv);
@@ -441,6 +444,8 @@ static int __devinit omap2430_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, glue);
+ INIT_WORK(&glue->omap_musb_mailbox_work, omap_musb_mailbox_work);
+
ret = platform_device_add_resources(musb, pdev->resource,
pdev->num_resources);
if (ret) {
@@ -478,6 +483,7 @@ static int __devexit omap2430_remove(struct platform_device *pdev)
{
struct omap2430_glue *glue = platform_get_drvdata(pdev);
+ cancel_work_sync(&glue->omap_musb_mailbox_work);
platform_device_del(glue->musb);
platform_device_put(glue->musb);
kfree(glue);
--
1.7.5.4
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