From: Champion Chen <champion_chen@xxxxxxxxxxxxxx>
Suspend could fail for some platforms because
btusb_suspend==> btusb_stop_traffic ==> usb_kill_anchored_urbs,
When btusb_bulk_complete returns before system suspend and resubmits an urb,
the system cannot enter suspend state.
Signed-off-by: Champion Chen <champion_chen@xxxxxxxxxxxxxx>
Signed-off-by: Larry Finger <Larry.Finger@xxxxxxxxxxxx>
---
V2 - Fix incorrect test as noted by Marcel.
---
Johan,
To help Champion with the process, I have formatted the patch in
the correct manner. I hope I understand the issue correctly and
stated it in a coherent manner in the commit message.
Larry
---
drivers/bluetooth/btusb.c | 9 +++++++++
1 file changed, 9 insertions(+)
Index: linux-2.6/drivers/bluetooth/btusb.c
===================================================================
--- linux-2.6.orig/drivers/bluetooth/btusb.c
+++ linux-2.6/drivers/bluetooth/btusb.c
@@ -330,6 +330,9 @@ static void btusb_intr_complete(struct u
BT_ERR("%s corrupted event packet", hdev->name);
hdev->stat.err_rx++;
}
+ } else if (urb->status == -ENOENT) {
+ /* Avoid suspend failed when usb_kill_urb */
+ return;
}
if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
@@ -418,6 +421,9 @@ static void btusb_bulk_complete(struct u
BT_ERR("%s corrupted ACL packet", hdev->name);
hdev->stat.err_rx++;
}
+ } else if (urb->status == -ENOENT) {
+ /* Avoid suspend failed when usb_kill_urb */
+ return;
}
if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
@@ -512,6 +518,9 @@ static void btusb_isoc_complete(struct u
hdev->stat.err_rx++;
}
}
+ } else if (urb->status == -ENOENT) {
+ /* Avoid suspend failed when usb_kill_urb */
+ return;
}
if (!test_bit(BTUSB_ISOC_RUNNING, &data->flags))
--
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