6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Heikki Krogerus heikki.krogerus@linux.intel.com
[ Upstream commit 8bdf8a42bca4f47646fd105a387ab6926948c7f1 ]
It is possible that also the GET_ERROR command fails. If that happens, the command completion still needs to be acknowledged. Otherwise the interface will be stuck until it's reset.
Reported-by: Ammy Yi ammy.yi@intel.com Fixes: bdc62f2bae8f ("usb: typec: ucsi: Simplified registration and I/O API") Cc: stable@vger.kernel.org Signed-off-by: Heikki Krogerus heikki.krogerus@linux.intel.com Reviewed-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org Link: https://lore.kernel.org/r/20240531104653.1303519-1-heikki.krogerus@linux.int... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/usb/typec/ucsi/ucsi.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c index 9b0ad06db6dab..f6fb5575d4f0a 100644 --- a/drivers/usb/typec/ucsi/ucsi.c +++ b/drivers/usb/typec/ucsi/ucsi.c @@ -153,8 +153,13 @@ static int ucsi_exec_command(struct ucsi *ucsi, u64 cmd) }
if (cci & UCSI_CCI_ERROR) { - if (cmd == UCSI_GET_ERROR_STATUS) + if (cmd == UCSI_GET_ERROR_STATUS) { + ret = ucsi_acknowledge(ucsi, false); + if (ret) + return ret; + return -EIO; + } return ucsi_read_error(ucsi); }