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From:   Douglas Anderson <dianders@chromium.org>
To:     Jakub Kicinski <kuba@kernel.org>,
        Hayes Wang <hayeswang@realtek.com>,
        "David S . Miller" <davem@davemloft.net>
Cc:     Grant Grundler <grundler@chromium.org>,
        Edward Hill <ecgh@chromium.org>, linux-usb@vger.kernel.org,
        Simon Horman <horms@kernel.org>,
        Laura Nao <laura.nao@collabora.com>,
        Alan Stern <stern@rowland.harvard.edu>,
        Douglas Anderson <dianders@chromium.org>,
        =?UTF-8?q?Bj=C3=B8rn=20Mork?= <bjorn@mork.no>,
        Eric Dumazet <edumazet@google.com>,
        Paolo Abeni <pabeni@redhat.com>, linux-kernel@vger.kernel.org,
        netdev@vger.kernel.org
Subject: [PATCH v4 3/5] r8152: Check for unplug in r8153b_ups_en() / r8153c_ups_en()
Date:   Thu, 19 Oct 2023 14:20:22 -0700
Message-ID: <20231019142019.v4.3.I6405b1587446c157c6d6263957571f2b11f330a7@changeid>
In-Reply-To: <20231019212130.3146151-1-dianders@chromium.org>
References: <20231019212130.3146151-1-dianders@chromium.org>
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If the adapter is unplugged while we're looping in r8153b_ups_en() /
r8153c_ups_en() we could end up looping for 10 seconds (20 ms * 500
loops). Add code similar to what's done in other places in the driver
to check for unplug and bail.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
---

(no changes since v2)

Changes in v2:
- ("Check for unplug in r8153b_ups_en() / r8153c_ups_en()") new for v2.

 drivers/net/usb/r8152.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index fff2f9e67b5f..888d3884821e 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -3663,6 +3663,8 @@ static void r8153b_ups_en(struct r8152 *tp, bool enable)
 			int i;
 
 			for (i = 0; i < 500; i++) {
+				if (test_bit(RTL8152_UNPLUG, &tp->flags))
+					return;
 				if (ocp_read_word(tp, MCU_TYPE_PLA, PLA_BOOT_CTRL) &
 				    AUTOLOAD_DONE)
 					break;
@@ -3703,6 +3705,8 @@ static void r8153c_ups_en(struct r8152 *tp, bool enable)
 			int i;
 
 			for (i = 0; i < 500; i++) {
+				if (test_bit(RTL8152_UNPLUG, &tp->flags))
+					return;
 				if (ocp_read_word(tp, MCU_TYPE_PLA, PLA_BOOT_CTRL) &
 				    AUTOLOAD_DONE)
 					break;
-- 
2.42.0.758.gaed0368e0e-goog