linux-kernel - [PATCH v2 12/18] media: venus: Refactor struct hfi_session_get_property

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Message-Id: <20240507-cocci-flexarray-v2-12-7aea262cf065@chromium.org>
Date: Tue, 07 May 2024 16:27:17 +0000
From: Ricardo Ribalda <ribalda@...omium.org>
To: Michael Tretter <m.tretter@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Mauro Carvalho Chehab <mchehab@...nel.org>, 
 Laurent Pinchart <laurent.pinchart@...asonboard.com>, 
 Michal Simek <michal.simek@....com>, Andy Walls <awalls@...metrocast.net>, 
 Stanimir Varbanov <stanimir.k.varbanov@...il.com>, 
 Vikash Garodia <quic_vgarodia@...cinc.com>, 
 Bryan O'Donoghue <bryan.odonoghue@...aro.org>, 
 Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konrad.dybcio@...aro.org>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-arm-msm@...r.kernel.org, 
 Hans Verkuil <hverkuil-cisco@...all.nl>, 
 Ricardo Ribalda <ribalda@...omium.org>
Subject: [PATCH v2 12/18] media: venus: Refactor struct
 hfi_session_get_property_pkt

The struct hfi_session_get_property_pkt is always used to fectch a
single property. Make that explicit in the code and avoid a single
element array at the end of the struct.

This change fixes the following cocci warning:
drivers/media/platform/qcom/venus/hfi_cmds.h:194:5-9: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)

Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
---
 drivers/media/platform/qcom/venus/hfi_cmds.c | 8 ++++----
 drivers/media/platform/qcom/venus/hfi_cmds.h | 4 ++--
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/media/platform/qcom/venus/hfi_cmds.c b/drivers/media/platform/qcom/venus/hfi_cmds.c
index 3418d2dd9371..520ff8a587e6 100644
--- a/drivers/media/platform/qcom/venus/hfi_cmds.c
+++ b/drivers/media/platform/qcom/venus/hfi_cmds.c
@@ -401,8 +401,8 @@ static int pkt_session_get_property_1x(struct hfi_session_get_property_pkt *pkt,
 	pkt->shdr.hdr.size = sizeof(*pkt);
 	pkt->shdr.hdr.pkt_type = HFI_CMD_SESSION_GET_PROPERTY;
 	pkt->shdr.session_id = hash32_ptr(cookie);
-	pkt->num_properties = 1;
-	pkt->data[0] = ptype;
+	pkt->one = 1;
+	pkt->data = ptype;
 
 	return 0;
 }
@@ -1106,11 +1106,11 @@ pkt_session_get_property_3xx(struct hfi_session_get_property_pkt *pkt,
 	pkt->shdr.hdr.size = sizeof(struct hfi_session_get_property_pkt);
 	pkt->shdr.hdr.pkt_type = HFI_CMD_SESSION_GET_PROPERTY;
 	pkt->shdr.session_id = hash32_ptr(cookie);
-	pkt->num_properties = 1;
+	pkt->one = 1;
 
 	switch (ptype) {
 	case HFI_PROPERTY_CONFIG_VDEC_ENTROPY:
-		pkt->data[0] = HFI_PROPERTY_CONFIG_VDEC_ENTROPY;
+		pkt->data = HFI_PROPERTY_CONFIG_VDEC_ENTROPY;
 		break;
 	default:
 		ret = pkt_session_get_property_1x(pkt, cookie, ptype);
diff --git a/drivers/media/platform/qcom/venus/hfi_cmds.h b/drivers/media/platform/qcom/venus/hfi_cmds.h
index 6dff949c4402..e1dd0ea2be1a 100644
--- a/drivers/media/platform/qcom/venus/hfi_cmds.h
+++ b/drivers/media/platform/qcom/venus/hfi_cmds.h
@@ -190,8 +190,8 @@ struct hfi_session_resume_pkt {
 
 struct hfi_session_get_property_pkt {
 	struct hfi_session_hdr_pkt shdr;
-	u32 num_properties;
-	u32 data[1];
+	u32 one;
+	u32 data;
 };
 
 struct hfi_session_release_buffer_pkt {

-- 
2.45.0.rc1.225.g2a3ae87e7f-goog