[PATCH] HID: fix noderef.cocci warnings

drivers/hid/hid-alps.c:139:3-9: ERROR: application of sizeof to pointer
drivers/hid/hid-alps.c:148:4-10: ERROR: application of sizeof to pointer

 sizeof when applied to a pointer typed expression gives the size of
 the pointer

Generated by: scripts/coccinelle/misc/noderef.cocci

CC: Masaki Ota <redacted>
Signed-off-by: Fengguang Wu <redacted>
---

 hid-alps.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/hid/hid-alps.c
+++ b/drivers/hid/hid-alps.c

@@ -136,7 +136,8 @@ static int u1_read_write_register(struct
 
 	input[7] = check_sum;
 	ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, input,
-			sizeof(input), HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
+			sizeof(*input), HID_FEATURE_REPORT,
+			HID_REQ_SET_REPORT);
 
 	if (ret < 0) {
 		dev_err(&hdev->dev, "failed to read command (%d)\n", ret);

@@ -145,7 +146,7 @@ static int u1_read_write_register(struct
 
 	if (read_flag) {
 		ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, readbuf,
-				sizeof(readbuf), HID_FEATURE_REPORT,
+				sizeof(*readbuf), HID_FEATURE_REPORT,
 				HID_REQ_GET_REPORT);
 
 		if (ret < 0) {
--

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Hi, fengguang,

	ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, input,
-			sizeof(input), HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
+			sizeof(*input), HID_FEATURE_REPORT,
+			HID_REQ_SET_REPORT);

I tested this code, but our device cannot work on it.
So, I think we should modify the code as below.

	ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, input,
			sizeof(u8)*U1_FEATURE_REPORT_LEN,
			HID_FEATURE_REPORT, HID_REQ_SET_REPORT);

Best Regards,
Masaki Ota
-----Original Message-----
From: kbuild test robot [mailto:fengguang.wu@intel.com] 
Sent: Saturday, June 18, 2016 9:13 PM
Cc: kbuild-all@01.org; linux-input@vger.kernel.org; linux-usb@vger.kernel.org; Jiri Kosina; 太田 真喜 Masaki Ota
Subject: [PATCH] HID: fix noderef.cocci warnings

drivers/hid/hid-alps.c:139:3-9: ERROR: application of sizeof to pointer
drivers/hid/hid-alps.c:148:4-10: ERROR: application of sizeof to pointer

 sizeof when applied to a pointer typed expression gives the size of  the pointer

Generated by: scripts/coccinelle/misc/noderef.cocci

CC: Masaki Ota <redacted>
Signed-off-by: Fengguang Wu <redacted>
---

 hid-alps.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/hid/hid-alps.c
+++ b/drivers/hid/hid-alps.c

@@ -136,7 +136,8 @@ static int u1_read_write_register(struct
 
 	input[7] = check_sum;
 	ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, input,
-			sizeof(input), HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
+			sizeof(*input), HID_FEATURE_REPORT,
+			HID_REQ_SET_REPORT);
 
 	if (ret < 0) {
 		dev_err(&hdev->dev, "failed to read command (%d)\n", ret); @@ -145,7 +146,7 @@ static int u1_read_write_register(struct
 
 	if (read_flag) {
 		ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, readbuf,
-				sizeof(readbuf), HID_FEATURE_REPORT,
+				sizeof(*readbuf), HID_FEATURE_REPORT,
 				HID_REQ_GET_REPORT);
 
 		if (ret < 0) {

Hi Masaki,

On Mon, Jun 20, 2016 at 09:45:02AM +0000, Masaki Ota wrote:

Hi, fengguang,

	ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, input,
-			sizeof(input), HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
+			sizeof(*input), HID_FEATURE_REPORT,
+			HID_REQ_SET_REPORT);

I tested this code, but our device cannot work on it.
So, I think we should modify the code as below.

	ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, input,
			sizeof(u8)*U1_FEATURE_REPORT_LEN,
			HID_FEATURE_REPORT, HID_REQ_SET_REPORT);

OK, thank you for the fix!

Fenguang

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