From: Tzung-Bi Shih tzungbi@kernel.org
stable inclusion from stable-v5.10.121 commit acd2313bd99d94fba4696d49ced7ab7a091e1c54 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I5L6CQ
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 2cd01bd6b117df07b1bc2852f08694fdd29e40ed ]
Fix cros_ec_register() to unregister platform devices if blocking_notifier_chain_register() fails.
Also use the single exit path to handle the platform device unregistration.
Fixes: 42cd0ab476e2 ("platform/chrome: cros_ec: Query EC protocol version if EC transitions between RO/RW") Reviewed-by: Prashant Malani pmalani@chromium.org Signed-off-by: Tzung-Bi Shih tzungbi@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com Acked-by: Xie XiuQi xiexiuqi@huawei.com --- drivers/platform/chrome/cros_ec.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-)
diff --git a/drivers/platform/chrome/cros_ec.c b/drivers/platform/chrome/cros_ec.c index 3104680b7485..979f92194e81 100644 --- a/drivers/platform/chrome/cros_ec.c +++ b/drivers/platform/chrome/cros_ec.c @@ -175,6 +175,8 @@ int cros_ec_register(struct cros_ec_device *ec_dev) ec_dev->max_request = sizeof(struct ec_params_hello); ec_dev->max_response = sizeof(struct ec_response_get_protocol_info); ec_dev->max_passthru = 0; + ec_dev->ec = NULL; + ec_dev->pd = NULL;
ec_dev->din = devm_kzalloc(dev, ec_dev->din_size, GFP_KERNEL); if (!ec_dev->din) @@ -231,18 +233,16 @@ int cros_ec_register(struct cros_ec_device *ec_dev) if (IS_ERR(ec_dev->pd)) { dev_err(ec_dev->dev, "Failed to create CrOS PD platform device\n"); - platform_device_unregister(ec_dev->ec); - return PTR_ERR(ec_dev->pd); + err = PTR_ERR(ec_dev->pd); + goto exit; } }
if (IS_ENABLED(CONFIG_OF) && dev->of_node) { err = devm_of_platform_populate(dev); if (err) { - platform_device_unregister(ec_dev->pd); - platform_device_unregister(ec_dev->ec); dev_err(dev, "Failed to register sub-devices\n"); - return err; + goto exit; } }
@@ -264,12 +264,16 @@ int cros_ec_register(struct cros_ec_device *ec_dev) err = blocking_notifier_chain_register(&ec_dev->event_notifier, &ec_dev->notifier_ready); if (err) - return err; + goto exit; }
dev_info(dev, "Chrome EC device registered\n");
return 0; +exit: + platform_device_unregister(ec_dev->ec); + platform_device_unregister(ec_dev->pd); + return err; } EXPORT_SYMBOL(cros_ec_register);