From: Hangyu Hua hbh25y@gmail.com
stable inclusion from stable-v5.10.121 commit ee89d8dee55ab4b3b8ad8b70866b2841ba334767 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 950cf957fe34d40d63dfa3bf3968210430b6491e ]
info_release() will be called in device_unregister() when info->dev's reference count is 0. So there is no need to call ocxl_afu_put() and kfree() again.
Fix this by adding free_minor() and return to err_unregister error path.
Fixes: 75ca758adbaf ("ocxl: Create a clear delineation between ocxl backend & frontend") Signed-off-by: Hangyu Hua hbh25y@gmail.com Acked-by: Frederic Barrat fbarrat@linux.ibm.com Signed-off-by: Michael Ellerman mpe@ellerman.id.au Link: https://lore.kernel.org/r/20220418085758.38145-1-hbh25y@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com Acked-by: Xie XiuQi xiexiuqi@huawei.com --- drivers/misc/ocxl/file.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/misc/ocxl/file.c b/drivers/misc/ocxl/file.c index 4d1b44de1492..c742ab02ae18 100644 --- a/drivers/misc/ocxl/file.c +++ b/drivers/misc/ocxl/file.c @@ -558,7 +558,9 @@ int ocxl_file_register_afu(struct ocxl_afu *afu)
err_unregister: ocxl_sysfs_unregister_afu(info); // safe to call even if register failed + free_minor(info); device_unregister(&info->dev); + return rc; err_put: ocxl_afu_put(afu); free_minor(info);