[PATCH net-next v2 2/2] r8152: move calling delay_autosuspend function
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STALE3413d
From: Hayes Wang <hidden>
Date: 2017-06-13 07:15:02
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Subsystem:
networking drivers, the rest, usb networking drivers · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Revision v2 of 2 in this series.
Revisions (2)
- v1 [diff vs current]
- v2 current
Move calling delay_autosuspend() in rtl8152_runtime_suspend(). Calling delay_autosuspend() as late as possible. The original flows are 1. check if the driver/device is busy now. 2. set wake events. 3. enter runtime suspend. If the wake event occurs between (1) and (2), the device may miss it. Besides, to avoid the runtime resume occurs after runtime suspend immediately, move the checking to the end of rtl8152_runtime_suspend(). Signed-off-by: Hayes Wang <redacted> --- drivers/net/usb/r8152.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-)
diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index 2d238b5..b916418 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c@@ -3752,13 +3752,6 @@ static int rtl8152_runtime_suspend(struct r8152 *tp) if (netif_running(netdev) && test_bit(WORK_ENABLE, &tp->flags)) { u32 rcr = 0; - if (delay_autosuspend(tp)) { - clear_bit(SELECTIVE_SUSPEND, &tp->flags); - smp_mb__after_atomic(); - ret = -EBUSY; - goto out1; - } - if (netif_carrier_ok(netdev)) { u32 ocp_data;
@@ -3792,6 +3785,11 @@ static int rtl8152_runtime_suspend(struct r8152 *tp) ocp_write_dword(tp, MCU_TYPE_PLA, PLA_RCR, rcr); napi_enable(napi); } + + if (delay_autosuspend(tp)) { + rtl8152_runtime_resume(tp); + ret = -EBUSY; + } } out1:
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2.7.4