Hi,
the hub driver depends on GFP_ATOMIC not failing for correct
functioning. Here's a patch that handles it with a workqueue.
Regards
Oliver
Signed-off-by: Oliver Neukum <[EMAIL PROTECTED]>
-----
--- a/drivers/usb/core/hub.c 2007-02-28 15:04:45.000000000 +0100
+++ b/drivers/usb/core/hub.c 2007-03-01 10:30:25.000000000 +0100
@@ -71,6 +71,7 @@
unsigned has_indicators:1;
u8 indicator[USB_MAXCHILDREN];
struct delayed_work leds;
+ struct delayed_work low_mem_work;
};
@@ -208,6 +209,24 @@
status);
}
+#define USB_HUB_LOWMEM_DELAY 2*HZ
+
+static void low_mem_work(struct work_struct *work)
+{
+ struct usb_hub *hub =
+ container_of(work, struct usb_hub, low_mem_work.work);
+ int r;
+
+ r = usb_submit_urb(hub->urb, GFP_KERNEL);
+ if (r < 0) {
+ if (r == -ENOMEM)
+ schedule_delayed_work(&hub->low_mem_work,
+ USB_HUB_LOWMEM_DELAY);
+ else
+ dev_err (hub->intfdev, "resubmit --> %d\n", r);
+ }
+}
+
#define LED_CYCLE_PERIOD ((2*HZ)/3)
static void led_work (struct work_struct *work)
@@ -381,6 +400,8 @@
if ((status = usb_submit_urb (hub->urb, GFP_ATOMIC)) != 0
&& status != -ENODEV && status != -EPERM)
dev_err (hub->intfdev, "resubmit --> %d\n", status);
+ if (status == -ENOMEM)
+ schedule_delayed_work(&hub->low_mem_work, USB_HUB_LOWMEM_DELAY);
}
/* USB 2.0 spec Section 11.24.2.3 */
@@ -508,6 +529,7 @@
/* (blocking) stop khubd and related activity */
usb_kill_urb(hub->urb);
+ cancel_delayed_work(&hub->low_mem_work);
if (hub->has_indicators)
cancel_delayed_work(&hub->leds);
if (hub->has_indicators || hub->tt.hub)
@@ -936,6 +958,7 @@
hub->intfdev = &intf->dev;
hub->hdev = hdev;
INIT_DELAYED_WORK(&hub->leds, led_work);
+ INIT_DELAYED_WORK(&hub->low_mem_work, low_mem_work);
usb_set_intfdata (intf, hub);
intf->needs_remote_wakeup = 1;
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