From: Ivo van Doorn <ivdoorn@gmail.com>
To: "John W. Linville" <linville@tuxdriver.com>
Cc: linux-wireless@vger.kernel.org, users@rt2x00.serialmonkey.com
Subject: [PATCH 04/17] rt2x00: fix hang when unplugging USB device in use
Date: Mon, 13 Dec 2010 12:32:49 +0100 [thread overview]
Message-ID: <201012131232.50201.IvDoorn@gmail.com> (raw)
In-Reply-To: <201012131232.23491.IvDoorn@gmail.com>
From: Johannes Stezenbach <js@sig21.net>
When an rt2x00 USB device is unplugged while in use, it reliably
hangs the whole system. After some time the watchdog prints:
BUG: soft lockup - CPU#0 stuck for 64s! [kworker/u:0:5]
...
[<c01a88d8>] (usb_submit_urb+0x0/0x2ac) from [<bf0e752c>] (rt2x00usb_kick_rx_entry+0xb4/0xe8 [rt2x00usb])
[<bf0e7478>] (rt2x00usb_kick_rx_entry+0x0/0xe8 [rt2x00usb]) from [<bf0e7588>] (rt2x00usb_clear_entry+x28/0x2c [rt2x00usb])
[<bf0e7560>] (rt2x00usb_clear_entry+0x0/0x2c [rt2x00usb]) from [<bf0d5bc4>] (rt2x00lib_rxdone+0x2e0/0x2f8 [rt2x00lib])
[<bf0d58e4>] (rt2x00lib_rxdone+0x0/0x2f8 [rt2x00lib]) from [<bf0e7e00>] (rt2x00usb_work_rxdone+0x54/0x74 [rt2x00usb])
[<bf0e7dac>] (rt2x00usb_work_rxdone+0x0/0x74 [rt2x00usb]) from [<c00542b4>] (process_one_work+0x20c/0x35c)
Clear the DEVICE_STATE_PRESENT flag when usb_submit_urb()
returns -ENODEV to fix this.
Signed-off-by: Johannes Stezenbach <js@sig21.net>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
---
drivers/net/wireless/rt2x00/rt2x00usb.c | 14 ++++++++++++--
1 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/rt2x00/rt2x00usb.c b/drivers/net/wireless/rt2x00/rt2x00usb.c
index 9ac1459..3a6c83e 100644
--- a/drivers/net/wireless/rt2x00/rt2x00usb.c
+++ b/drivers/net/wireless/rt2x00/rt2x00usb.c
@@ -235,6 +235,7 @@ static void rt2x00usb_kick_tx_entry(struct queue_entry *entry)
struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
struct queue_entry_priv_usb *entry_priv = entry->priv_data;
u32 length;
+ int status;
if (!test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags))
return;
@@ -251,7 +252,10 @@ static void rt2x00usb_kick_tx_entry(struct queue_entry *entry)
entry->skb->data, length,
rt2x00usb_interrupt_txdone, entry);
- if (usb_submit_urb(entry_priv->urb, GFP_ATOMIC)) {
+ status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
+ if (status) {
+ if (status == -ENODEV)
+ clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
rt2x00lib_dmadone(entry);
}
@@ -435,6 +439,7 @@ void rt2x00usb_clear_entry(struct queue_entry *entry)
to_usb_device_intf(entry->queue->rt2x00dev->dev);
struct queue_entry_priv_usb *entry_priv = entry->priv_data;
int pipe;
+ int status;
entry->flags = 0;
@@ -445,7 +450,12 @@ void rt2x00usb_clear_entry(struct queue_entry *entry)
rt2x00usb_interrupt_rxdone, entry);
set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
- if (usb_submit_urb(entry_priv->urb, GFP_ATOMIC)) {
+
+ status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
+ if (status) {
+ if (status == -ENODEV)
+ clear_bit(DEVICE_STATE_PRESENT,
+ &entry->queue->rt2x00dev->flags);
set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
rt2x00lib_dmadone(entry);
}
--
1.7.2.3
next prev parent reply other threads:[~2010-12-13 11:40 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-13 11:31 [PATCH 01/17] rt2x00: Add rt2800 EEPROM definition Ivo van Doorn
2010-12-13 11:31 ` [PATCH 02/17] rt2x00: Implement get_survey callback for rt2800 Ivo van Doorn
2010-12-13 11:32 ` [PATCH 03/17] rt2x00: Add RF chip definition Ivo van Doorn
2010-12-13 11:32 ` Ivo van Doorn [this message]
2010-12-13 11:33 ` [PATCH 05/17] rt2x00: Ensure TX-ed frames are returned in the original state Ivo van Doorn
2010-12-13 11:33 ` [PATCH 06/17] rt2x00: Don't frequently reset beacon interval in AdHoc mode Ivo van Doorn
2010-12-13 11:34 ` [PATCH 07/17] rt2x00: trivial: add missing \n on warnings Ivo van Doorn
2010-12-13 11:34 ` [PATCH 08/17] rt2x00: Introduce 3 queue commands in drivers (start, kick, stop) Ivo van Doorn
2010-12-13 11:34 ` [PATCH 09/17] rt2x00: Reorganize queue callback functions Ivo van Doorn
2010-12-13 11:35 ` [PATCH 10/17] rt2x00: Protect queue control with mutex Ivo van Doorn
2010-12-13 11:35 ` [PATCH 11/17] rt2x00: Add "flush" queue command Ivo van Doorn
2010-12-13 11:36 ` [PATCH 12/17] rt2x00: Cleanup RX index counting Ivo van Doorn
2010-12-13 11:36 ` [PATCH 13/17] rt2x00: Introduce extra queue entry sanity flag Ivo van Doorn
2010-12-13 11:36 ` [PATCH 14/17] rt2x00: Fix WMM Queue naming Ivo van Doorn
2010-12-13 11:38 ` [PATCH 15/17] rt2x00: remove stray semicolon Ivo van Doorn
2010-12-13 11:39 ` [PATCH 16/17] rt2x00: Pad beacon to multiple of 32 bits Ivo van Doorn
2010-12-13 11:39 ` [PATCH 17/17] rt2x00: Fix firmware loading regression on x86_64 Ivo van Doorn
2010-12-14 17:49 ` [PATCH 14/17] rt2x00: Fix WMM Queue naming Helmut Schaa
2010-12-14 18:44 ` Ivo Van Doorn
2010-12-14 18:57 ` Helmut Schaa
2010-12-14 19:24 ` Johannes Stezenbach
2010-12-15 16:38 ` Ivo Van Doorn
2010-12-13 12:27 ` [PATCH 04/17] rt2x00: fix hang when unplugging USB device in use Walter Goldens
2010-12-13 12:36 ` Ivo Van Doorn
2010-12-13 13:16 ` Walter Goldens
2010-12-16 13:04 ` Walter Goldens
2010-12-16 14:10 ` wimaxd daemon bug Alexander Khryukin
2010-12-17 13:58 ` Alexander Khryukin
2010-12-16 20:43 ` [PATCH 04/17] rt2x00: fix hang when unplugging USB device in use Ivo Van Doorn
2010-12-17 11:56 ` Walter Goldens
2010-12-17 15:02 ` Johannes Stezenbach
2010-12-17 16:33 ` Walter Goldens
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