[PATCH AUTOSEL 6.9 23/35] net: dsa: realtek: do not assert reset on remove

[Sasha Levin]

From: Luiz Angelo Daros de Luca <luizluca@xxxxxxxxx>

[ Upstream commit 4f580e9aced1816398c1c64f178302a22b8ea6e2 ]

The necessity of asserting the reset on removal was previously
questioned, as DSA's own cleanup methods should suffice to prevent
traffic leakage[1].

When a driver has subdrivers controlled by devres, they will be
unregistered after the main driver's .remove is executed. If it asserts
a reset, the subdrivers will be unable to communicate with the hardware
during their cleanup. For LEDs, this means that they will fail to turn
off, resulting in a timeout error.

[1] https://lore.kernel.org/r/20240123215606.26716-9-luizluca@xxxxxxxxx/

Signed-off-by: Luiz Angelo Daros de Luca <luizluca@xxxxxxxxx>
Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/net/dsa/realtek/rtl83xx.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/net/dsa/realtek/rtl83xx.c b/drivers/net/dsa/realtek/rtl83xx.c
index d2e876805393b..a9c1702431efb 100644
--- a/drivers/net/dsa/realtek/rtl83xx.c
+++ b/drivers/net/dsa/realtek/rtl83xx.c
@@ -290,16 +290,13 @@ EXPORT_SYMBOL_NS_GPL(rtl83xx_shutdown, REALTEK_DSA);
  * rtl83xx_remove() - Cleanup a realtek switch driver
  * @priv: realtek_priv pointer
  *
- * If a method is provided, this function asserts the hard reset of the switch
- * in order to avoid leaking traffic when the driver is gone.
+ * Placehold for common cleanup procedures.
  *
- * Context: Might sleep if priv->gdev->chip->can_sleep.
+ * Context: Any
  * Return: nothing
  */
 void rtl83xx_remove(struct realtek_priv *priv)
 {
-	/* leave the device reset asserted */
-	rtl83xx_reset_assert(priv);
 }
 EXPORT_SYMBOL_NS_GPL(rtl83xx_remove, REALTEK_DSA);
 
-- 
2.43.0