linux-kernel - [PATCH v3 2/5] r8152: Check for unplug in rtl_phy_patch

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Message-ID: <20231012122458.v3.2.I300ed6c3269c77756bdd10dd0d6f97db85470186@changeid>
Date:   Thu, 12 Oct 2023 12:25:01 -0700
From:   Douglas Anderson <dianders@...omium.org>
To:     Jakub Kicinski <kuba@...nel.org>,
        Hayes Wang <hayeswang@...ltek.com>,
        "David S . Miller" <davem@...emloft.net>
Cc:     Alan Stern <stern@...land.harvard.edu>,
        Simon Horman <horms@...nel.org>,
        Edward Hill <ecgh@...omium.org>,
        Laura Nao <laura.nao@...labora.com>, linux-usb@...r.kernel.org,
        Grant Grundler <grundler@...omium.org>,
        Douglas Anderson <dianders@...omium.org>,
        Bjørn Mork <bjorn@...k.no>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org
Subject: [PATCH v3 2/5] r8152: Check for unplug in rtl_phy_patch_request()

If the adapter is unplugged while we're looping in
rtl_phy_patch_request() we could end up looping for 10 seconds (2 ms *
5000 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@...omium.org>
---

(no changes since v2)

Changes in v2:
- ("Check for unplug in rtl_phy_patch_request()") new for v2.

 drivers/net/usb/r8152.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index 482957beae66..fff2f9e67b5f 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -4046,6 +4046,9 @@ static int rtl_phy_patch_request(struct r8152 *tp, bool request, bool wait)
 	for (i = 0; wait && i < 5000; i++) {
 		u32 ocp_data;
 
+		if (test_bit(RTL8152_UNPLUG, &tp->flags))
+			break;
+
 		usleep_range(1000, 2000);
 		ocp_data = ocp_reg_read(tp, OCP_PHY_PATCH_STAT);
 		if ((ocp_data & PATCH_READY) ^ check)
-- 
2.42.0.655.g421f12c284-goog