linux/drivers/phy/ti
Hans de Goede bf6e4ee5c4 phy: ti: tusb1210: Resolve charger-det crash if charger psy is unregistered
The power_supply frame-work is not really designed for there to be
long living in kernel references to power_supply devices.

Specifically unregistering a power_supply while some other code has
a reference to it triggers a WARN in power_supply_unregister():

	WARN_ON(atomic_dec_return(&psy->use_cnt));

Folllowed by the power_supply still getting removed and the
backing data freed anyway, leaving the tusb1210 charger-detect code
with a dangling reference, resulting in a crash the next time
tusb1210_get_online() is called.

Fix this by only holding the reference in tusb1210_get_online()
freeing it at the end of the function. Note this still leaves
a theoretical race window, but it avoids the issue when manually
rmmod-ing the charger chip driver during development.

Fixes: 48969a5623 ("phy: ti: tusb1210: Add charger detection")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20240406140821.18624-1-hdegoede@redhat.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2024-04-12 16:57:19 +05:30
..
Kconfig
Makefile
phy-am654-serdes.c phy: constify of_phandle_args in xlate 2024-02-23 17:43:14 +05:30
phy-da8xx-usb.c phy: constify of_phandle_args in xlate 2024-02-23 17:43:14 +05:30
phy-dm816x-usb.c
phy-gmii-sel.c phy: constify of_phandle_args in xlate 2024-02-23 17:43:14 +05:30
phy-j721e-wiz.c
phy-omap-control.c
phy-omap-usb2.c
phy-ti-pipe3.c
phy-tusb1210.c phy: ti: tusb1210: Resolve charger-det crash if charger psy is unregistered 2024-04-12 16:57:19 +05:30
phy-twl4030-usb.c