[PATCH] brcmfmac: Replace zero-length array with flexible array member

From: Len Baker
Date: Sat Sep 04 2021 - 05:23:11 EST


There is a regular need in the kernel to provide a way to declare
having a dynamically sized set of trailing elements in a structure.
Kernel code should always use "flexible array members"[1] for these
cases. The older style of one-element or zero-length arrays should
no longer be used[2].

Also, make use of the struct_size() helper in devm_kzalloc().

[1] https://en.wikipedia.org/wiki/Flexible_array_member
[2] https://www.kernel.org/doc/html/v5.14/process/deprecated.html#zero-length-and-one-element-arrays

Signed-off-by: Len Baker <len.baker@xxxxxxx>
---
drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c | 2 +-
include/linux/platform_data/brcmfmac.h | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c
index 2f7bc3a70c65..513c7e6421b2 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/of.c
@@ -29,7 +29,7 @@ static int brcmf_of_get_country_codes(struct device *dev,
return (count == -EINVAL) ? 0 : count;
}

- cc = devm_kzalloc(dev, sizeof(*cc) + count * sizeof(*cce), GFP_KERNEL);
+ cc = devm_kzalloc(dev, struct_size(cc, table, count), GFP_KERNEL);
if (!cc)
return -ENOMEM;

diff --git a/include/linux/platform_data/brcmfmac.h b/include/linux/platform_data/brcmfmac.h
index 1d30bf278231..2b5676ff35be 100644
--- a/include/linux/platform_data/brcmfmac.h
+++ b/include/linux/platform_data/brcmfmac.h
@@ -125,7 +125,7 @@ struct brcmfmac_pd_cc_entry {
*/
struct brcmfmac_pd_cc {
int table_size;
- struct brcmfmac_pd_cc_entry table[0];
+ struct brcmfmac_pd_cc_entry table[];
};

/**
--
2.25.1