31 lines
1.1 KiB
Diff
31 lines
1.1 KiB
Diff
From 8c751e0d9a5264376935a84429a2d468c8877d99 Mon Sep 17 00:00:00 2001
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From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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Date: Sun, 20 Feb 2022 15:15:17 +0000
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Subject: [PATCH] nvmem: core: Check input parameter for NULL in
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nvmem_unregister()
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nvmem_unregister() frees resources and standard pattern is to allow
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caller to not care if it's NULL or not. This will reduce burden on
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the callers to perform this check.
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Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
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Link: https://lore.kernel.org/r/20220220151527.17216-4-srinivas.kandagatla@linaro.org
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Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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---
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drivers/nvmem/core.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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--- a/drivers/nvmem/core.c
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+++ b/drivers/nvmem/core.c
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@@ -904,7 +904,8 @@ static void nvmem_device_release(struct
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*/
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void nvmem_unregister(struct nvmem_device *nvmem)
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{
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- kref_put(&nvmem->refcnt, nvmem_device_release);
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+ if (nvmem)
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+ kref_put(&nvmem->refcnt, nvmem_device_release);
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}
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EXPORT_SYMBOL_GPL(nvmem_unregister);
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