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path: root/drivers/usb/host/whci/asl.c
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Diffstat (limited to 'drivers/usb/host/whci/asl.c')
-rw-r--r--drivers/usb/host/whci/asl.c46
1 files changed, 18 insertions, 28 deletions
diff --git a/drivers/usb/host/whci/asl.c b/drivers/usb/host/whci/asl.c
index 4d7078e50572..577c0d29849d 100644
--- a/drivers/usb/host/whci/asl.c
+++ b/drivers/usb/host/whci/asl.c
@@ -19,32 +19,11 @@
#include <linux/dma-mapping.h>
#include <linux/uwb/umc.h>
#include <linux/usb.h>
-#define D_LOCAL 0
-#include <linux/uwb/debug.h>
#include "../../wusbcore/wusbhc.h"
#include "whcd.h"
-#if D_LOCAL >= 4
-static void dump_asl(struct whc *whc, const char *tag)
-{
- struct device *dev = &whc->umc->dev;
- struct whc_qset *qset;
-
- d_printf(4, dev, "ASL %s\n", tag);
-
- list_for_each_entry(qset, &whc->async_list, list_node) {
- dump_qset(qset, dev);
- }
-}
-#else
-static inline void dump_asl(struct whc *whc, const char *tag)
-{
-}
-#endif
-
-
static void qset_get_next_prev(struct whc *whc, struct whc_qset *qset,
struct whc_qset **next, struct whc_qset **prev)
{
@@ -179,11 +158,26 @@ void asl_stop(struct whc *whc)
1000, "stop ASL");
}
+/**
+ * asl_update - request an ASL update and wait for the hardware to be synced
+ * @whc: the WHCI HC
+ * @wusbcmd: WUSBCMD value to start the update.
+ *
+ * If the WUSB HC is inactive (i.e., the ASL is stopped) then the
+ * update must be skipped as the hardware may not respond to update
+ * requests.
+ */
void asl_update(struct whc *whc, uint32_t wusbcmd)
{
- whc_write_wusbcmd(whc, wusbcmd, wusbcmd);
- wait_event(whc->async_list_wq,
- (le_readl(whc->base + WUSBCMD) & WUSBCMD_ASYNC_UPDATED) == 0);
+ struct wusbhc *wusbhc = &whc->wusbhc;
+
+ mutex_lock(&wusbhc->mutex);
+ if (wusbhc->active) {
+ whc_write_wusbcmd(whc, wusbcmd, wusbcmd);
+ wait_event(whc->async_list_wq,
+ (le_readl(whc->base + WUSBCMD) & WUSBCMD_ASYNC_UPDATED) == 0);
+ }
+ mutex_unlock(&wusbhc->mutex);
}
/**
@@ -202,8 +196,6 @@ void scan_async_work(struct work_struct *work)
spin_lock_irq(&whc->lock);
- dump_asl(whc, "before processing");
-
/*
* Transerve the software list backwards so new qsets can be
* safely inserted into the ASL without making it non-circular.
@@ -217,8 +209,6 @@ void scan_async_work(struct work_struct *work)
update |= process_qset(whc, qset);
}
- dump_asl(whc, "after processing");
-
spin_unlock_irq(&whc->lock);
if (update) {
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