kernel/drivers/net/usb/r8152.c, branch linux-4.3.y

r8152: fix lockup when runtime PM is enabled

2016-01-23T04:55:45Z

[ Upstream commit 90186af404ada5a47b875bf3c16d0b02bb023ea0 ] When an interface is brought up which was previously suspended (via runtime PM), it would hang. This happens because napi_disable is called before napi_enable. Solve this by avoiding napi_enable in the resume during open function (netif_running is true when open is called, IFF_UP is set after a successful open; netif_running is false when close is called, but IFF_UP is then still set). While at it, remove WORK_ENABLE check from rtl8152_open (introduced with the original change) because it cannot happen: - After this patch, runtime resume will not set it during rtl8152_open. - When link is up, rtl8152_open is not called. - When link is down during system/auto suspend/resume, it is not set. Fixes: 41cec84cf285 ("r8152: don't enable napi before rx ready") Link: https://lkml.kernel.org/r/20151205105912.GA1766@al Signed-off-by: Peter Wu Acked-by: Hayes Wang Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman

r8152: fix the runtime suspend issues

2015-09-10T03:27:54Z

Fix the runtime suspend issues result from the linking change. Case 1: a) link down occurs. b) driver disable tx/rx. c) autosuspend occurs. d) hw linking up. e) device suspends without enabling tx/rx. f) couldn't wake up when receiving packets. Case 2: a) Nway results in linking down. b) autosuspend occurs. c) device suspends. d) device may not wake up when linking up. Signed-off-by: Hayes Wang Signed-off-by: David S. Miller

r8152: split DRIVER_VERSION

2015-09-10T03:27:54Z

Split DRIVER_VERSION into NETNEXT_VERSION and NET_VERSION. Then, according to the value of DRIVER_VERSION, we could know which patches are used generally without comparing the source code. Signed-off-by: Hayes Wang Signed-off-by: David S. Miller

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2015-08-01T06:52:20Z

Conflicts: arch/s390/net/bpf_jit_comp.c drivers/net/ethernet/ti/netcp_ethss.c net/bridge/br_multicast.c net/ipv4/ip_fragment.c All four conflicts were cases of simple overlapping changes. Signed-off-by: David S. Miller

r8152: disable the capability of zero length

2015-07-31T22:24:59Z

The UEFI driver would enable zero length, and the Linux driver doesn't need it. Zero length let the hw complete the transfer with length 0, when there is no received packet. It would add the load of USB host controller and reduce the performance. Signed-off-by: Hayes Wang Signed-off-by: David S. Miller

r8152: reset device when tx timeout

2015-07-30T21:03:46Z

The device reset is necessary if the hw becomes abnormal and stops transmitting packets. Signed-off-by: Hayes Wang Signed-off-by: David S. Miller

r8152: add pre_reset and post_reset

2015-07-30T21:03:46Z

Add rtl8152_pre_reset() and rtl8152_post_reset() which are used when calling usb_reset_device(). The two functions could reduce the time of reset when calling usb_reset_device() after probe(). Signed-off-by: Hayes Wang Signed-off-by: David S. Miller

r8152: don't enable napi before rx ready

2015-07-27T07:56:39Z

Adjust napi_disable() and napi_enable() to avoid r8152_poll() start working before rx ready. Otherwise, it may have race condition for rx_agg. Signed-off-by: Hayes Wang Signed-off-by: David S. Miller

r8152: fix wakeup settings

2015-07-27T07:56:38Z

Avoid the driver to enable WOL if the device doesn't support it. Signed-off-by: Hayes Wang Signed-off-by: David S. Miller

r8152: fix the issue about U1/U2

2015-07-27T07:56:38Z

- Disable U1/U2 during initialization. - Disable lpm when linking is on, and enable it when linking is off. - Disable U1/U2 when enabling runtime suspend. It is possible to let hw stop working, if the U1/U2 request occurs during some situations. The patch is used to avoid it. Signed-off-by: Hayes Wang Signed-off-by: David S. Miller