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iio: proximity: cros_ec_mkbp_proximity: Avoid -Wflex-array-member-not-at-end warning

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-Wflex-array-member-not-at-end was introduced in GCC-14, and we are
getting ready to enable it, globally.

Use the `DEFINE_RAW_FLEX()` helper for an on-stack definition of
a flexible structure where the size of the flexible-array member
is known at compile-time, and refactor the rest of the code,
accordingly.

So, with these changes, fix the following warning:

drivers/iio/proximity/cros_ec_mkbp_proximity.c:63:40: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Tzung-Bi Shih <tzungbi@kernel.org>
Link: https://patch.msgid.link/Z9lEYdPPIyiRGm36@kspp
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Gustavo A. R. Silva 2025-03-18 20:31:05 +10:30 committed by Jonathan Cameron
parent dc0e07126e
commit c72ada9978
1 changed files with 5 additions and 10 deletions
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15
drivers/iio/proximity/cros_ec_mkbp_proximity.c
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@ -59,16 +59,11 @@ static int cros_ec_mkbp_proximity_parse_state(const void *data)
static int cros_ec_mkbp_proximity_query(struct cros_ec_device *ec_dev,
int *state)
{
struct {
struct cros_ec_command msg;
union {
struct ec_params_mkbp_info params;
u32 switches;
};
} __packed buf = { };
struct ec_params_mkbp_info *params = &buf.params;
struct cros_ec_command *msg = &buf.msg;
u32 *switches = &buf.switches;
DEFINE_RAW_FLEX(struct cros_ec_command, buf, data,
MAX(sizeof(u32), sizeof(struct ec_params_mkbp_info)));
struct ec_params_mkbp_info *params = (struct ec_params_mkbp_info *)buf->data;
struct cros_ec_command *msg = buf;
u32 *switches = (u32 *)buf->data;
size_t insize = sizeof(*switches);
int ret;