Patch "r8152: check rx after napi is enabled" has been added to the 4.9-stable tree

This is a note to let you know that I've just added the patch titled

r8152: check rx after napi is enabled

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:

     r8152-check-rx-after-napi-is-enabled.patch

and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: hayeswang <[email protected]>
Date: Thu, 26 Jan 2017 09:38:34 +0800
Subject: r8152: check rx after napi is enabled

From: hayeswang <[email protected]>

[ Upstream commit 7489bdadb7d17d3c81e39b85688500f700beb790 ]

Schedule the napi after napi_enable() for rx, if it is necessary.

If the rx is completed when napi is disabled, the sheduling of napi would be lost. Then, no one handles the rx packet until next napi is scheduled.

---
 drivers/net/usb/r8152.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

@@ -32,7 +32,7 @@
 #define NETNEXT_VERSION		"08"
 
 /* Information for net */
-#define NET_VERSION		"7"
+#define NET_VERSION		"8"
 
 #define DRIVER_VERSION		"v1." NETNEXT_VERSION "." NET_VERSION
 #define DRIVER_AUTHOR "Realtek linux nic maintainers <[email protected]>"

@@ -3552,6 +3552,9 @@ static int rtl8152_post_reset(struct usb
 
 	napi_enable(&tp->napi);
 
+	if (!list_empty(&tp->rx_done))
+		napi_schedule(&tp->napi);
+
 	return 0;
 }
 

@@ -3691,6 +3694,8 @@ static int rtl8152_resume(struct usb_int
 			napi_enable(&tp->napi);
 			clear_bit(SELECTIVE_SUSPEND, &tp->flags);
 			smp_mb__after_atomic();
+			if (!list_empty(&tp->rx_done))
+				napi_schedule(&tp->napi);
 		} else {
 			tp->rtl_ops.up(tp);
 			netif_carrier_off(tp->netdev);

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/r8152-fix-rtl8152_post_reset-function.patch queue-4.9/r8152-re-schedule-napi-for-tx.patch queue-4.9/r8152-avoid-start_xmit-to-call-napi_schedule-during-autosuspend.patch queue-4.9/r8152-check-rx-after-napi-is-enabled.patch