1 files changed, 0 insertions, 128 deletions
diff --git a/target/linux/generic/backport-5.15/735-v5.14-18-net-dsa-qca8k-dsa-qca8k-protect-MASTER-busy_wait-wit.patch b/target/linux/generic/backport-5.15/735-v5.14-18-net-dsa-qca8k-dsa-qca8k-protect-MASTER-busy_wait-wit.patch
deleted file mode 100644
index b6684d7210..0000000000
--- a/target/linux/generic/backport-5.15/735-v5.14-18-net-dsa-qca8k-dsa-qca8k-protect-MASTER-busy_wait-wit.patch
+++ /dev/null
@@ -1,128 +0,0 @@
-From 60df02b6ea4581d72eb7a3ab7204504a54059b72 Mon Sep 17 00:00:00 2001
-From: Ansuel Smith <ansuelsmth@gmail.com>
-Date: Fri, 14 May 2021 23:00:08 +0200
-Subject: [PATCH] net: dsa: qca8k: dsa: qca8k: protect MASTER busy_wait with
- mdio mutex
-
-MDIO_MASTER operation have a dedicated busy wait that is not protected
-by the mdio mutex. This can cause situation where the MASTER operation
-is done and a normal operation is executed between the MASTER read/write
-and the MASTER busy_wait. Rework the qca8k_mdio_read/write function to
-address this issue by binding the lock for the whole MASTER operation
-and not only the mdio read/write common operation.
-
-Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
-Reviewed-by: Andrew Lunn <andrew@lunn.ch>
-Signed-off-by: David S. Miller <davem@davemloft.net>
----
- drivers/net/dsa/qca8k.c | 68 +++++++++++++++++++++++++++++++++--------
- 1 file changed, 55 insertions(+), 13 deletions(-)
-
---- a/drivers/net/dsa/qca8k.c
-+++ b/drivers/net/dsa/qca8k.c
-@@ -628,8 +628,31 @@ qca8k_port_to_phy(int port)
- }
- 
- static int
-+qca8k_mdio_busy_wait(struct qca8k_priv *priv, u32 reg, u32 mask)
-+{
-+	u16 r1, r2, page;
-+	u32 val;
-+	int ret;
-+
-+	qca8k_split_addr(reg, &r1, &r2, &page);
-+
-+	ret = read_poll_timeout(qca8k_mii_read32, val, !(val & mask), 0,
-+				QCA8K_BUSY_WAIT_TIMEOUT * USEC_PER_MSEC, false,
-+				priv->bus, 0x10 | r2, r1);
-+
-+	/* Check if qca8k_read has failed for a different reason
-+	 * before returnting -ETIMEDOUT
-+	 */
-+	if (ret < 0 && val < 0)
-+		return val;
-+
-+	return ret;
-+}
-+
-+static int
- qca8k_mdio_write(struct qca8k_priv *priv, int port, u32 regnum, u16 data)
- {
-+	u16 r1, r2, page;
- 	u32 phy, val;
- 	int ret;
- 
-@@ -645,12 +668,21 @@ qca8k_mdio_write(struct qca8k_priv *priv
- 	      QCA8K_MDIO_MASTER_REG_ADDR(regnum) |
- 	      QCA8K_MDIO_MASTER_DATA(data);
- 
--	ret = qca8k_write(priv, QCA8K_MDIO_MASTER_CTRL, val);
-+	qca8k_split_addr(QCA8K_MDIO_MASTER_CTRL, &r1, &r2, &page);
-+
-+	mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
-+
-+	ret = qca8k_set_page(priv->bus, page);
- 	if (ret)
--		return ret;
-+		goto exit;
-+
-+	qca8k_mii_write32(priv->bus, 0x10 | r2, r1, val);
- 
--	ret = qca8k_busy_wait(priv, QCA8K_MDIO_MASTER_CTRL,
--			      QCA8K_MDIO_MASTER_BUSY);
-+	ret = qca8k_mdio_busy_wait(priv, QCA8K_MDIO_MASTER_CTRL,
-+				   QCA8K_MDIO_MASTER_BUSY);
-+
-+exit:
-+	mutex_unlock(&priv->bus->mdio_lock);
- 
- 	/* even if the busy_wait timeouts try to clear the MASTER_EN */
- 	qca8k_reg_clear(priv, QCA8K_MDIO_MASTER_CTRL,
-@@ -662,6 +694,7 @@ qca8k_mdio_write(struct qca8k_priv *priv
- static int
- qca8k_mdio_read(struct qca8k_priv *priv, int port, u32 regnum)
- {
-+	u16 r1, r2, page;
- 	u32 phy, val;
- 	int ret;
- 
-@@ -676,21 +709,30 @@ qca8k_mdio_read(struct qca8k_priv *priv,
- 	      QCA8K_MDIO_MASTER_READ | QCA8K_MDIO_MASTER_PHY_ADDR(phy) |
- 	      QCA8K_MDIO_MASTER_REG_ADDR(regnum);
- 
--	ret = qca8k_write(priv, QCA8K_MDIO_MASTER_CTRL, val);
--	if (ret)
--		return ret;
-+	qca8k_split_addr(QCA8K_MDIO_MASTER_CTRL, &r1, &r2, &page);
-+
-+	mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED);
- 
--	ret = qca8k_busy_wait(priv, QCA8K_MDIO_MASTER_CTRL,
--			      QCA8K_MDIO_MASTER_BUSY);
-+	ret = qca8k_set_page(priv->bus, page);
- 	if (ret)
--		return ret;
-+		goto exit;
- 
--	val = qca8k_read(priv, QCA8K_MDIO_MASTER_CTRL);
--	if (val < 0)
--		return val;
-+	qca8k_mii_write32(priv->bus, 0x10 | r2, r1, val);
-+
-+	ret = qca8k_mdio_busy_wait(priv, QCA8K_MDIO_MASTER_CTRL,
-+				   QCA8K_MDIO_MASTER_BUSY);
-+	if (ret)
-+		goto exit;
- 
-+	val = qca8k_mii_read32(priv->bus, 0x10 | r2, r1);
- 	val &= QCA8K_MDIO_MASTER_DATA_MASK;
- 
-+exit:
-+	mutex_unlock(&priv->bus->mdio_lock);
-+
-+	if (val >= 0)
-+		val &= QCA8K_MDIO_MASTER_DATA_MASK;
-+
- 	/* even if the busy_wait timeouts try to clear the MASTER_EN */
- 	qca8k_reg_clear(priv, QCA8K_MDIO_MASTER_CTRL,
- 			QCA8K_MDIO_MASTER_EN);