diff options
| author | Larry Finger <Larry.Finger@lwfinger.net> | 2015-04-24 11:03:37 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-06-06 08:21:07 -0700 |
| commit | 41e6fa28dea0ef4efd06e96e785cb88cfe2c17ed (patch) | |
| tree | 9626a1a97b5b2129b6c9f95d00f927a6f50ece7b | |
| parent | 4ca8642f51bdacc1e4fc5f04fa3de92ff6de4706 (diff) | |
rtlwifi: rtl8192cu: Fix kernel deadlock
commit 414b7e3b9ce8b0577f613e656fdbc36b34b444dd upstream.
The USB mini-driver in rtlwifi, which is used by rtl8192cu, issues a call to
usb_control_msg() with a timeout value of 0. In some instances where the
interface is shutting down, this infinite wait results in a CPU deadlock. A
one second timeout fixes this problem without affecting any normal operations.
This bug is reported at https://bugzilla.novell.com/show_bug.cgi?id=927786.
Reported-by: Bernhard Wiedemann <bwiedemann@suse.com>
Tested-by: Bernhard Wiedemann <bwiedemann@suse.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Bernhard Wiedemann <bwiedemann@suse.com>
Cc: Takashi Iwai<tiwai@suse.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/wireless/rtlwifi/usb.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/wireless/rtlwifi/usb.c b/drivers/net/wireless/rtlwifi/usb.c index 46ee956d0235..27cd6cabf6c5 100644 --- a/drivers/net/wireless/rtlwifi/usb.c +++ b/drivers/net/wireless/rtlwifi/usb.c @@ -126,7 +126,7 @@ static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request, do { status = usb_control_msg(udev, pipe, request, reqtype, value, - index, pdata, len, 0); /*max. timeout*/ + index, pdata, len, 1000); if (status < 0) { /* firmware download is checksumed, don't retry */ if ((value >= FW_8192C_START_ADDRESS && |