[PATCH RESEND 0/2] HID: pidff: checkpatch fixes

[PATCH RESEND 0/2] HID: pidff: checkpatch fixes

[Tomasz Pakuła]

No reason to write too much. Fixing errors and warnings from checkpatch.
Made on top of for-6.15/pidff. Applies cleanly on 6.15-rc2 as well.

I apologize for not checking my patches earlier.

Tomasz Pakuła (2):
  HID: hid-universal-pidff: Fix errors from checkpatch
  HID: pidff: Fix checkpatch errors and warnings

 drivers/hid/hid-universal-pidff.c |  10 +--
 drivers/hid/usbhid/hid-pidff.c    | 129 +++++++++++++-----------------
 drivers/hid/usbhid/hid-pidff.h    |   3 +-
 3 files changed, 63 insertions(+), 79 deletions(-)


base-commit: e2fa0bdf08a70623f24ed52f2037a330999d9800
-- 
2.49.0

[PATCH RESEND 1/2] HID: hid-universal-pidff: Fix errors from checkpatch

[Tomasz Pakuła]

Signed-off-by: Tomasz Pakuła <tomasz.pakula.oficjalny@gmail.com>
---
 drivers/hid/hid-universal-pidff.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/hid/hid-universal-pidff.c b/drivers/hid/hid-universal-pidff.c
index 001a0f5efb9d..dc3ed69dac72 100644
--- a/drivers/hid/hid-universal-pidff.c
+++ b/drivers/hid/hid-universal-pidff.c
@@ -56,7 +56,8 @@ static int universal_pidff_input_mapping(struct hid_device *hdev,
 static int universal_pidff_probe(struct hid_device *hdev,
 				 const struct hid_device_id *id)
 {
-	int i, error;
+	int error;
+
 	error = hid_parse(hdev);
 	if (error) {
 		hid_err(hdev, "HID parse failed\n");
@@ -71,7 +72,7 @@ static int universal_pidff_probe(struct hid_device *hdev,
 
 	/* Check if device contains PID usage page */
 	error = 1;
-	for (i = 0; i < hdev->collection_size; i++)
+	for (int i = 0; i < hdev->collection_size; i++)
 		if ((hdev->collection[i].usage & HID_USAGE_PAGE) == HID_UP_PID) {
 			error = 0;
 			hid_dbg(hdev, "PID usage page found\n");
@@ -91,8 +92,8 @@ static int universal_pidff_probe(struct hid_device *hdev,
 
 	/* Check if HID_PID support is enabled */
 	int (*init_function)(struct hid_device *, u32);
-	init_function = hid_pidff_init_with_quirks;
 
+	init_function = hid_pidff_init_with_quirks;
 	if (!init_function) {
 		hid_warn(hdev, "HID_PID support not enabled!\n");
 		return 0;
@@ -114,14 +115,13 @@ static int universal_pidff_probe(struct hid_device *hdev,
 static int universal_pidff_input_configured(struct hid_device *hdev,
 					    struct hid_input *hidinput)
 {
-	int axis;
 	struct input_dev *input = hidinput->input;
 
 	if (!input->absinfo)
 		return 0;
 
 	/* Decrease fuzz and deadzone on available axes */
-	for (axis = ABS_X; axis <= ABS_BRAKE; axis++) {
+	for (int axis = ABS_X; axis <= ABS_BRAKE; axis++) {
 		if (!test_bit(axis, input->absbit))
 			continue;
 
-- 
2.49.0

Re: [PATCH RESEND 1/2] HID: hid-universal-pidff: Fix errors from checkpatch

[Greg KH]

On Tue, Apr 15, 2025 at 01:08:17AM +0200, Tomasz Pakuła wrote:
> Signed-off-by: Tomasz Pakuła <tomasz.pakula.oficjalny@gmail.com>
> ---
>  drivers/hid/hid-universal-pidff.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)


Hi,

This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent him
a patch that has triggered this response.  He used to manually respond
to these common problems, but in order to save his sanity (he kept
writing the same thing over and over, yet to different people), I was
created.  Hopefully you will not take offence and will fix the problem
in your patch and resubmit it so that it can be accepted into the Linux
kernel tree.

You are receiving this message because of the following common error(s)
as indicated below:

- You did not specify a description of why the patch is needed, or
  possibly, any description at all, in the email body.  Please read the
  section entitled "The canonical patch format" in the kernel file,
  Documentation/process/submitting-patches.rst for what is needed in
  order to properly describe the change.

If you wish to discuss this problem further, or you have questions about
how to resolve this issue, please feel free to respond to this email and
Greg will reply once he has dug out from the pending patches received
from other developers.

thanks,

greg k-h's patch email bot

[PATCH RESEND 2/2] HID: pidff: Fix checkpatch errors and warnings

[Tomasz Pakuła]

Signed-off-by: Tomasz Pakuła <tomasz.pakula.oficjalny@gmail.com>
---
 drivers/hid/usbhid/hid-pidff.c | 129 ++++++++++++++-------------------
 drivers/hid/usbhid/hid-pidff.h |   3 +-
 2 files changed, 58 insertions(+), 74 deletions(-)

diff --git a/drivers/hid/usbhid/hid-pidff.c b/drivers/hid/usbhid/hid-pidff.c
index 8dfd2c554a27..844fc4d84be5 100644
--- a/drivers/hid/usbhid/hid-pidff.c
+++ b/drivers/hid/usbhid/hid-pidff.c
@@ -210,9 +210,7 @@ struct pidff_device {
  */
 static s32 pidff_clamp(s32 i, struct hid_field *field)
 {
-	s32 clamped = clamp(i, field->logical_minimum, field->logical_maximum);
-	pr_debug("clamped from %d to %d", i, clamped);
-	return clamped;
+	return clamp(i, field->logical_minimum, field->logical_maximum);
 }
 
 /*
@@ -229,8 +227,10 @@ static int pidff_rescale(int i, int max, struct hid_field *field)
  */
 static int pidff_rescale_signed(int i, struct hid_field *field)
 {
-	if (i > 0) return i * field->logical_maximum / S16_MAX;
-	if (i < 0) return i * field->logical_minimum / S16_MIN;
+	if (i > 0)
+		return i * field->logical_maximum / S16_MAX;
+	if (i < 0)
+		return i * field->logical_minimum / S16_MIN;
 	return 0;
 }
 
@@ -241,11 +241,12 @@ static u32 pidff_rescale_time(u16 time, struct hid_field *field)
 {
 	u32 scaled_time = time;
 	int exponent = field->unit_exponent;
+
 	pr_debug("time field exponent: %d\n", exponent);
 
-	for (;exponent < FF_TIME_EXPONENT; exponent++)
+	for (; exponent < FF_TIME_EXPONENT; exponent++)
 		scaled_time *= 10;
-	for (;exponent > FF_TIME_EXPONENT; exponent--)
+	for (; exponent > FF_TIME_EXPONENT; exponent--)
 		scaled_time /= 10;
 
 	pr_debug("time calculated from %d to %d\n", time, scaled_time);
@@ -265,18 +266,18 @@ static void pidff_set_signed(struct pidff_usage *usage, s16 value)
 	else {
 		if (value < 0)
 			usage->value[0] =
-			    pidff_rescale(-value, -S16_MIN, usage->field);
+				pidff_rescale(-value, -S16_MIN, usage->field);
 		else
 			usage->value[0] =
-			    pidff_rescale(value, S16_MAX, usage->field);
+				pidff_rescale(value, S16_MAX, usage->field);
 	}
 	pr_debug("calculated from %d to %d\n", value, usage->value[0]);
 }
 
 static void pidff_set_time(struct pidff_usage *usage, u16 time)
 {
-	u32 modified_time = pidff_rescale_time(time, usage->field);
-	usage->value[0] = pidff_clamp(modified_time, usage->field);
+	usage->value[0] = pidff_clamp(pidff_rescale_time(time, usage->field),
+				      usage->field);
 }
 
 static void pidff_set_duration(struct pidff_usage *usage, u16 duration)
@@ -332,6 +333,7 @@ static int pidff_needs_set_envelope(struct ff_envelope *envelope,
 				    struct ff_envelope *old)
 {
 	bool needs_new_envelope;
+
 	needs_new_envelope = envelope->attack_level  != 0 ||
 			     envelope->fade_level    != 0 ||
 			     envelope->attack_length != 0 ||
@@ -460,15 +462,13 @@ static int pidff_needs_set_periodic(struct ff_effect *effect,
 static void pidff_set_condition_report(struct pidff_device *pidff,
 				       struct ff_effect *effect)
 {
-	int i, max_axis;
-
 	/* Devices missing Parameter Block Offset can only have one axis */
-	max_axis = pidff->quirks & HID_PIDFF_QUIRK_MISSING_PBO ? 1 : 2;
+	int max_axis = pidff->quirks & HID_PIDFF_QUIRK_MISSING_PBO ? 1 : 2;
 
 	pidff->set_condition[PID_EFFECT_BLOCK_INDEX].value[0] =
 		pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0];
 
-	for (i = 0; i < max_axis; i++) {
+	for (int i = 0; i < max_axis; i++) {
 		/* Omit Parameter Block Offset if missing */
 		if (!(pidff->quirks & HID_PIDFF_QUIRK_MISSING_PBO))
 			pidff->set_condition[PID_PARAM_BLOCK_OFFSET].value[0] = i;
@@ -496,10 +496,9 @@ static void pidff_set_condition_report(struct pidff_device *pidff,
 static int pidff_needs_set_condition(struct ff_effect *effect,
 				     struct ff_effect *old)
 {
-	int i;
 	int ret = 0;
 
-	for (i = 0; i < 2; i++) {
+	for (int i = 0; i < 2; i++) {
 		struct ff_condition_effect *cond = &effect->u.condition[i];
 		struct ff_condition_effect *old_cond = &old->u.condition[i];
 
@@ -557,7 +556,6 @@ static void pidff_set_gain_report(struct pidff_device *pidff, u16 gain)
  */
 static void pidff_set_device_control(struct pidff_device *pidff, int field)
 {
-	int i, index;
 	int field_index = pidff->control_id[field];
 
 	if (field_index < 1)
@@ -568,8 +566,9 @@ static void pidff_set_device_control(struct pidff_device *pidff, int field)
 		hid_dbg(pidff->hid, "DEVICE_CONTROL is a bitmask\n");
 
 		/* Clear current bitmask */
-		for(i = 0; i < sizeof(pidff_device_control); i++) {
-			index = pidff->control_id[i];
+		for (int i = 0; i < sizeof(pidff_device_control); i++) {
+			int index = pidff->control_id[i];
+
 			if (index < 1)
 				continue;
 
@@ -615,11 +614,10 @@ static void pidff_reset(struct pidff_device *pidff)
  */
 static void pidff_fetch_pool(struct pidff_device *pidff)
 {
-	int i;
 	struct hid_device *hid = pidff->hid;
 
 	/* Repeat if PID_SIMULTANEOUS_MAX < 2 to make sure it's correct */
-	for(i = 0; i < 20; i++) {
+	for (int i = 0; i < 20; i++) {
 		hid_hw_request(hid, pidff->reports[PID_POOL], HID_REQ_GET_REPORT);
 		hid_hw_wait(hid);
 
@@ -643,8 +641,6 @@ static void pidff_fetch_pool(struct pidff_device *pidff)
  */
 static int pidff_request_effect_upload(struct pidff_device *pidff, int efnum)
 {
-	int j;
-
 	if (!pidff->effect_count)
 		pidff_reset(pidff);
 
@@ -657,11 +653,12 @@ static int pidff_request_effect_upload(struct pidff_device *pidff, int efnum)
 	pidff->block_load_status->value[0] = 0;
 	hid_hw_wait(pidff->hid);
 
-	for (j = 0; j < 60; j++) {
+	for (int i = 0; i < 60; i++) {
 		hid_dbg(pidff->hid, "pid_block_load requested\n");
 		hid_hw_request(pidff->hid, pidff->reports[PID_BLOCK_LOAD],
 				HID_REQ_GET_REPORT);
 		hid_hw_wait(pidff->hid);
+
 		if (pidff->block_load_status->value[0] ==
 		    pidff->status_id[PID_BLOCK_LOAD_SUCCESS]) {
 			hid_dbg(pidff->hid, "device reported free memory: %d bytes\n",
@@ -715,6 +712,7 @@ static void pidff_playback_pid(struct pidff_device *pidff, int pid_id, int n)
 static int pidff_playback(struct input_dev *dev, int effect_id, int value)
 {
 	struct pidff_device *pidff = dev->ff->private;
+
 	pidff_playback_pid(pidff, pidff->pid_id[effect_id], value);
 	return 0;
 }
@@ -741,8 +739,7 @@ static int pidff_erase_effect(struct input_dev *dev, int effect_id)
 	struct pidff_device *pidff = dev->ff->private;
 	int pid_id = pidff->pid_id[effect_id];
 
-	hid_dbg(pidff->hid, "starting to erase %d/%d\n",
-		effect_id, pidff->pid_id[effect_id]);
+	hid_dbg(pidff->hid, "starting to erase %d/%d\n", effect_id, pid_id);
 
 	/*
 	 * Wait for the queue to clear. We do not want
@@ -762,8 +759,7 @@ static int pidff_upload_effect(struct input_dev *dev, struct ff_effect *effect,
 			       struct ff_effect *old)
 {
 	struct pidff_device *pidff = dev->ff->private;
-	int type_id;
-	int error;
+	int error, type_id;
 
 	pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0] = 0;
 	if (old) {
@@ -849,7 +845,7 @@ static int pidff_upload_effect(struct input_dev *dev, struct ff_effect *effect,
 	case FF_INERTIA:
 	case FF_FRICTION:
 		if (!old) {
-			switch(effect->type) {
+			switch (effect->type) {
 			case FF_SPRING:
 				type_id = PID_SPRING;
 				break;
@@ -939,23 +935,23 @@ static void pidff_set_autocenter(struct input_dev *dev, u16 magnitude)
 static int pidff_find_fields(struct pidff_usage *usage, const u8 *table,
 			     struct hid_report *report, int count, int strict)
 {
+	int return_value = 0;
+
 	if (!report) {
-		pr_debug("pidff_find_fields, null report\n");
+		pr_debug("%s, null report\n", __func__);
 		return -1;
 	}
 
-	int i, j, k, found;
-	int return_value = 0;
+	for (int k = 0; k < count; k++) {
+		int found = 0;
 
-	for (k = 0; k < count; k++) {
-		found = 0;
-		for (i = 0; i < report->maxfield; i++) {
+		for (int i = 0; i < report->maxfield; i++) {
 			if (report->field[i]->maxusage !=
 			    report->field[i]->report_count) {
 				pr_debug("maxusage and report_count do not match, skipping\n");
 				continue;
 			}
-			for (j = 0; j < report->field[i]->maxusage; j++) {
+			for (int j = 0; j < report->field[i]->maxusage; j++) {
 				if (report->field[i]->usage[j].hid ==
 				    (HID_UP_PID | table[k])) {
 					pr_debug("found %d at %d->%d\n",
@@ -974,13 +970,11 @@ static int pidff_find_fields(struct pidff_usage *usage, const u8 *table,
 			pr_debug("Delay field not found, but that's OK\n");
 			pr_debug("Setting MISSING_DELAY quirk\n");
 			return_value |= HID_PIDFF_QUIRK_MISSING_DELAY;
-		}
-		else if (!found && table[k] == pidff_set_condition[PID_PARAM_BLOCK_OFFSET]) {
+		} else if (!found && table[k] == pidff_set_condition[PID_PARAM_BLOCK_OFFSET]) {
 			pr_debug("PBO field not found, but that's OK\n");
 			pr_debug("Setting MISSING_PBO quirk\n");
 			return_value |= HID_PIDFF_QUIRK_MISSING_PBO;
-		}
-		else if (!found && strict) {
+		} else if (!found && strict) {
 			pr_debug("failed to locate %d\n", k);
 			return -1;
 		}
@@ -993,9 +987,7 @@ static int pidff_find_fields(struct pidff_usage *usage, const u8 *table,
  */
 static int pidff_check_usage(int usage)
 {
-	int i;
-
-	for (i = 0; i < sizeof(pidff_reports); i++)
+	for (int i = 0; i < sizeof(pidff_reports); i++)
 		if (usage == (HID_UP_PID | pidff_reports[i]))
 			return i;
 
@@ -1010,13 +1002,14 @@ static void pidff_find_reports(struct hid_device *hid, int report_type,
 			       struct pidff_device *pidff)
 {
 	struct hid_report *report;
-	int i, ret;
 
 	list_for_each_entry(report,
 			    &hid->report_enum[report_type].report_list, list) {
 		if (report->maxfield < 1)
 			continue;
-		ret = pidff_check_usage(report->field[0]->logical);
+
+		int ret = pidff_check_usage(report->field[0]->logical);
+
 		if (ret != -1) {
 			hid_dbg(hid, "found usage 0x%02x from field->logical\n",
 				pidff_reports[ret]);
@@ -1031,7 +1024,8 @@ static void pidff_find_reports(struct hid_device *hid, int report_type,
 		 * implementation hides this fact, so we have to dig it up
 		 * ourselves
 		 */
-		i = report->field[0]->usage[0].collection_index;
+		int i = report->field[0]->usage[0].collection_index;
+
 		if (i <= 0 ||
 		    hid->collection[i - 1].type != HID_COLLECTION_LOGICAL)
 			continue;
@@ -1050,9 +1044,7 @@ static void pidff_find_reports(struct hid_device *hid, int report_type,
  */
 static int pidff_reports_ok(struct pidff_device *pidff)
 {
-	int i;
-
-	for (i = 0; i <= PID_REQUIRED_REPORTS; i++) {
+	for (int i = 0; i <= PID_REQUIRED_REPORTS; i++) {
 		if (!pidff->reports[i]) {
 			hid_dbg(pidff->hid, "%d missing\n", i);
 			return 0;
@@ -1069,22 +1061,19 @@ static struct hid_field *pidff_find_special_field(struct hid_report *report,
 						  int usage, int enforce_min)
 {
 	if (!report) {
-		pr_debug("pidff_find_special_field, null report\n");
+		pr_debug("%s, null report\n", __func__);
 		return NULL;
 	}
 
-	int i;
-
-	for (i = 0; i < report->maxfield; i++) {
+	for (int i = 0; i < report->maxfield; i++) {
 		if (report->field[i]->logical == (HID_UP_PID | usage) &&
 		    report->field[i]->report_count > 0) {
 			if (!enforce_min ||
 			    report->field[i]->logical_minimum == 1)
 				return report->field[i];
-			else {
-				pr_err("logical_minimum is not 1 as it should be\n");
-				return NULL;
-			}
+
+			pr_err("logical_minimum is not 1 as it should be\n");
+			return NULL;
 		}
 	}
 	return NULL;
@@ -1096,12 +1085,10 @@ static struct hid_field *pidff_find_special_field(struct hid_report *report,
 static int pidff_find_special_keys(int *keys, struct hid_field *fld,
 				   const u8 *usagetable, int count)
 {
-
-	int i, j;
 	int found = 0;
 
-	for (i = 0; i < count; i++) {
-		for (j = 0; j < fld->maxusage; j++) {
+	for (int i = 0; i < count; i++) {
+		for (int j = 0; j < fld->maxusage; j++) {
 			if (fld->usage[j].hid == (HID_UP_PID | usagetable[i])) {
 				keys[i] = j + 1;
 				found++;
@@ -1203,10 +1190,9 @@ static int pidff_find_special_fields(struct pidff_device *pidff)
 static int pidff_find_effects(struct pidff_device *pidff,
 			      struct input_dev *dev)
 {
-	int i;
-
-	for (i = 0; i < sizeof(pidff_effect_types); i++) {
+	for (int i = 0; i < sizeof(pidff_effect_types); i++) {
 		int pidff_type = pidff->type_id[i];
+
 		if (pidff->set_effect_type->usage[pidff_type].hid !=
 		    pidff->create_new_effect_type->usage[pidff_type].hid) {
 			hid_err(pidff->hid,
@@ -1355,8 +1341,6 @@ static int pidff_init_fields(struct pidff_device *pidff, struct input_dev *dev)
 static int pidff_check_autocenter(struct pidff_device *pidff,
 				  struct input_dev *dev)
 {
-	int error;
-
 	/*
 	 * Let's find out if autocenter modification is supported
 	 * Specification doesn't specify anything, so we request an
@@ -1364,8 +1348,8 @@ static int pidff_check_autocenter(struct pidff_device *pidff,
 	 * effect id was one above the minimum, then we assume the first
 	 * effect id is a built-in spring type effect used for autocenter
 	 */
+	int error = pidff_request_effect_upload(pidff, 1);
 
-	error = pidff_request_effect_upload(pidff, 1);
 	if (error) {
 		hid_err(pidff->hid, "upload request failed\n");
 		return error;
@@ -1395,8 +1379,6 @@ int hid_pidff_init_with_quirks(struct hid_device *hid, u32 initial_quirks)
 	struct hid_input *hidinput = list_entry(hid->inputs.next,
 						struct hid_input, list);
 	struct input_dev *dev = hidinput->input;
-	struct ff_device *ff;
-	int max_effects;
 	int error;
 
 	hid_dbg(hid, "starting pid init\n");
@@ -1436,12 +1418,12 @@ int hid_pidff_init_with_quirks(struct hid_device *hid, u32 initial_quirks)
 	if (error)
 		goto fail;
 
-	max_effects =
+	int max_effects =
 	    pidff->block_load[PID_EFFECT_BLOCK_INDEX].field->logical_maximum -
 	    pidff->block_load[PID_EFFECT_BLOCK_INDEX].field->logical_minimum +
 	    1;
-	hid_dbg(hid, "max effects is %d\n", max_effects);
 
+	hid_dbg(hid, "max effects is %d\n", max_effects);
 	if (max_effects > PID_EFFECTS_MAX)
 		max_effects = PID_EFFECTS_MAX;
 
@@ -1465,7 +1447,8 @@ int hid_pidff_init_with_quirks(struct hid_device *hid, u32 initial_quirks)
 	if (error)
 		goto fail;
 
-	ff = dev->ff;
+	struct ff_device *ff = dev->ff;
+
 	ff->private = pidff;
 	ff->upload = pidff_upload_effect;
 	ff->erase = pidff_erase_effect;
diff --git a/drivers/hid/usbhid/hid-pidff.h b/drivers/hid/usbhid/hid-pidff.h
index dda571e0a5bd..bfb97cb84f18 100644
--- a/drivers/hid/usbhid/hid-pidff.h
+++ b/drivers/hid/usbhid/hid-pidff.h
@@ -10,7 +10,8 @@
 #define HID_PIDFF_QUIRK_MISSING_DELAY		BIT(0)
 
 /* Missing Paramter block offset (0x23). Skip it during SET_CONDITION
-   report upload */
+ * report upload
+ */
 #define HID_PIDFF_QUIRK_MISSING_PBO		BIT(1)
 
 /* Initialise device control field even if logical_minimum != 1 */
-- 
2.49.0

Re: [PATCH RESEND 2/2] HID: pidff: Fix checkpatch errors and warnings

[Greg KH]

On Tue, Apr 15, 2025 at 01:08:18AM +0200, Tomasz Pakuła wrote:
> Signed-off-by: Tomasz Pakuła <tomasz.pakula.oficjalny@gmail.com>
> ---
>  drivers/hid/usbhid/hid-pidff.c | 129 ++++++++++++++-------------------
>  drivers/hid/usbhid/hid-pidff.h |   3 +-
>  2 files changed, 58 insertions(+), 74 deletions(-)
> 
> diff --git a/drivers/hid/usbhid/hid-pidff.c b/drivers/hid/usbhid/hid-pidff.c
> index 8dfd2c554a27..844fc4d84be5 100644
> --- a/drivers/hid/usbhid/hid-pidff.c
> +++ b/drivers/hid/usbhid/hid-pidff.c
> @@ -210,9 +210,7 @@ struct pidff_device {
>   */
>  static s32 pidff_clamp(s32 i, struct hid_field *field)
>  {
> -	s32 clamped = clamp(i, field->logical_minimum, field->logical_maximum);
> -	pr_debug("clamped from %d to %d", i, clamped);
> -	return clamped;
> +	return clamp(i, field->logical_minimum, field->logical_maximum);
>  }
>  
>  /*
> @@ -229,8 +227,10 @@ static int pidff_rescale(int i, int max, struct hid_field *field)
>   */
>  static int pidff_rescale_signed(int i, struct hid_field *field)
>  {
> -	if (i > 0) return i * field->logical_maximum / S16_MAX;
> -	if (i < 0) return i * field->logical_minimum / S16_MIN;
> +	if (i > 0)
> +		return i * field->logical_maximum / S16_MAX;
> +	if (i < 0)
> +		return i * field->logical_minimum / S16_MIN;
>  	return 0;
>  }
>  
> @@ -241,11 +241,12 @@ static u32 pidff_rescale_time(u16 time, struct hid_field *field)
>  {
>  	u32 scaled_time = time;
>  	int exponent = field->unit_exponent;
> +
>  	pr_debug("time field exponent: %d\n", exponent);
>  
> -	for (;exponent < FF_TIME_EXPONENT; exponent++)
> +	for (; exponent < FF_TIME_EXPONENT; exponent++)
>  		scaled_time *= 10;
> -	for (;exponent > FF_TIME_EXPONENT; exponent--)
> +	for (; exponent > FF_TIME_EXPONENT; exponent--)
>  		scaled_time /= 10;
>  
>  	pr_debug("time calculated from %d to %d\n", time, scaled_time);
> @@ -265,18 +266,18 @@ static void pidff_set_signed(struct pidff_usage *usage, s16 value)
>  	else {
>  		if (value < 0)
>  			usage->value[0] =
> -			    pidff_rescale(-value, -S16_MIN, usage->field);
> +				pidff_rescale(-value, -S16_MIN, usage->field);
>  		else
>  			usage->value[0] =
> -			    pidff_rescale(value, S16_MAX, usage->field);
> +				pidff_rescale(value, S16_MAX, usage->field);
>  	}
>  	pr_debug("calculated from %d to %d\n", value, usage->value[0]);
>  }
>  
>  static void pidff_set_time(struct pidff_usage *usage, u16 time)
>  {
> -	u32 modified_time = pidff_rescale_time(time, usage->field);
> -	usage->value[0] = pidff_clamp(modified_time, usage->field);
> +	usage->value[0] = pidff_clamp(pidff_rescale_time(time, usage->field),
> +				      usage->field);
>  }
>  
>  static void pidff_set_duration(struct pidff_usage *usage, u16 duration)
> @@ -332,6 +333,7 @@ static int pidff_needs_set_envelope(struct ff_envelope *envelope,
>  				    struct ff_envelope *old)
>  {
>  	bool needs_new_envelope;
> +
>  	needs_new_envelope = envelope->attack_level  != 0 ||
>  			     envelope->fade_level    != 0 ||
>  			     envelope->attack_length != 0 ||
> @@ -460,15 +462,13 @@ static int pidff_needs_set_periodic(struct ff_effect *effect,
>  static void pidff_set_condition_report(struct pidff_device *pidff,
>  				       struct ff_effect *effect)
>  {
> -	int i, max_axis;
> -
>  	/* Devices missing Parameter Block Offset can only have one axis */
> -	max_axis = pidff->quirks & HID_PIDFF_QUIRK_MISSING_PBO ? 1 : 2;
> +	int max_axis = pidff->quirks & HID_PIDFF_QUIRK_MISSING_PBO ? 1 : 2;
>  
>  	pidff->set_condition[PID_EFFECT_BLOCK_INDEX].value[0] =
>  		pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0];
>  
> -	for (i = 0; i < max_axis; i++) {
> +	for (int i = 0; i < max_axis; i++) {
>  		/* Omit Parameter Block Offset if missing */
>  		if (!(pidff->quirks & HID_PIDFF_QUIRK_MISSING_PBO))
>  			pidff->set_condition[PID_PARAM_BLOCK_OFFSET].value[0] = i;
> @@ -496,10 +496,9 @@ static void pidff_set_condition_report(struct pidff_device *pidff,
>  static int pidff_needs_set_condition(struct ff_effect *effect,
>  				     struct ff_effect *old)
>  {
> -	int i;
>  	int ret = 0;
>  
> -	for (i = 0; i < 2; i++) {
> +	for (int i = 0; i < 2; i++) {
>  		struct ff_condition_effect *cond = &effect->u.condition[i];
>  		struct ff_condition_effect *old_cond = &old->u.condition[i];
>  
> @@ -557,7 +556,6 @@ static void pidff_set_gain_report(struct pidff_device *pidff, u16 gain)
>   */
>  static void pidff_set_device_control(struct pidff_device *pidff, int field)
>  {
> -	int i, index;
>  	int field_index = pidff->control_id[field];
>  
>  	if (field_index < 1)
> @@ -568,8 +566,9 @@ static void pidff_set_device_control(struct pidff_device *pidff, int field)
>  		hid_dbg(pidff->hid, "DEVICE_CONTROL is a bitmask\n");
>  
>  		/* Clear current bitmask */
> -		for(i = 0; i < sizeof(pidff_device_control); i++) {
> -			index = pidff->control_id[i];
> +		for (int i = 0; i < sizeof(pidff_device_control); i++) {
> +			int index = pidff->control_id[i];
> +
>  			if (index < 1)
>  				continue;
>  
> @@ -615,11 +614,10 @@ static void pidff_reset(struct pidff_device *pidff)
>   */
>  static void pidff_fetch_pool(struct pidff_device *pidff)
>  {
> -	int i;
>  	struct hid_device *hid = pidff->hid;
>  
>  	/* Repeat if PID_SIMULTANEOUS_MAX < 2 to make sure it's correct */
> -	for(i = 0; i < 20; i++) {
> +	for (int i = 0; i < 20; i++) {
>  		hid_hw_request(hid, pidff->reports[PID_POOL], HID_REQ_GET_REPORT);
>  		hid_hw_wait(hid);
>  
> @@ -643,8 +641,6 @@ static void pidff_fetch_pool(struct pidff_device *pidff)
>   */
>  static int pidff_request_effect_upload(struct pidff_device *pidff, int efnum)
>  {
> -	int j;
> -
>  	if (!pidff->effect_count)
>  		pidff_reset(pidff);
>  
> @@ -657,11 +653,12 @@ static int pidff_request_effect_upload(struct pidff_device *pidff, int efnum)
>  	pidff->block_load_status->value[0] = 0;
>  	hid_hw_wait(pidff->hid);
>  
> -	for (j = 0; j < 60; j++) {
> +	for (int i = 0; i < 60; i++) {
>  		hid_dbg(pidff->hid, "pid_block_load requested\n");
>  		hid_hw_request(pidff->hid, pidff->reports[PID_BLOCK_LOAD],
>  				HID_REQ_GET_REPORT);
>  		hid_hw_wait(pidff->hid);
> +
>  		if (pidff->block_load_status->value[0] ==
>  		    pidff->status_id[PID_BLOCK_LOAD_SUCCESS]) {
>  			hid_dbg(pidff->hid, "device reported free memory: %d bytes\n",
> @@ -715,6 +712,7 @@ static void pidff_playback_pid(struct pidff_device *pidff, int pid_id, int n)
>  static int pidff_playback(struct input_dev *dev, int effect_id, int value)
>  {
>  	struct pidff_device *pidff = dev->ff->private;
> +
>  	pidff_playback_pid(pidff, pidff->pid_id[effect_id], value);
>  	return 0;
>  }
> @@ -741,8 +739,7 @@ static int pidff_erase_effect(struct input_dev *dev, int effect_id)
>  	struct pidff_device *pidff = dev->ff->private;
>  	int pid_id = pidff->pid_id[effect_id];
>  
> -	hid_dbg(pidff->hid, "starting to erase %d/%d\n",
> -		effect_id, pidff->pid_id[effect_id]);
> +	hid_dbg(pidff->hid, "starting to erase %d/%d\n", effect_id, pid_id);
>  
>  	/*
>  	 * Wait for the queue to clear. We do not want
> @@ -762,8 +759,7 @@ static int pidff_upload_effect(struct input_dev *dev, struct ff_effect *effect,
>  			       struct ff_effect *old)
>  {
>  	struct pidff_device *pidff = dev->ff->private;
> -	int type_id;
> -	int error;
> +	int error, type_id;
>  
>  	pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0] = 0;
>  	if (old) {
> @@ -849,7 +845,7 @@ static int pidff_upload_effect(struct input_dev *dev, struct ff_effect *effect,
>  	case FF_INERTIA:
>  	case FF_FRICTION:
>  		if (!old) {
> -			switch(effect->type) {
> +			switch (effect->type) {
>  			case FF_SPRING:
>  				type_id = PID_SPRING;
>  				break;
> @@ -939,23 +935,23 @@ static void pidff_set_autocenter(struct input_dev *dev, u16 magnitude)
>  static int pidff_find_fields(struct pidff_usage *usage, const u8 *table,
>  			     struct hid_report *report, int count, int strict)
>  {
> +	int return_value = 0;
> +
>  	if (!report) {
> -		pr_debug("pidff_find_fields, null report\n");
> +		pr_debug("%s, null report\n", __func__);
>  		return -1;
>  	}
>  
> -	int i, j, k, found;
> -	int return_value = 0;
> +	for (int k = 0; k < count; k++) {
> +		int found = 0;
>  
> -	for (k = 0; k < count; k++) {
> -		found = 0;
> -		for (i = 0; i < report->maxfield; i++) {
> +		for (int i = 0; i < report->maxfield; i++) {
>  			if (report->field[i]->maxusage !=
>  			    report->field[i]->report_count) {
>  				pr_debug("maxusage and report_count do not match, skipping\n");
>  				continue;
>  			}
> -			for (j = 0; j < report->field[i]->maxusage; j++) {
> +			for (int j = 0; j < report->field[i]->maxusage; j++) {
>  				if (report->field[i]->usage[j].hid ==
>  				    (HID_UP_PID | table[k])) {
>  					pr_debug("found %d at %d->%d\n",
> @@ -974,13 +970,11 @@ static int pidff_find_fields(struct pidff_usage *usage, const u8 *table,
>  			pr_debug("Delay field not found, but that's OK\n");
>  			pr_debug("Setting MISSING_DELAY quirk\n");
>  			return_value |= HID_PIDFF_QUIRK_MISSING_DELAY;
> -		}
> -		else if (!found && table[k] == pidff_set_condition[PID_PARAM_BLOCK_OFFSET]) {
> +		} else if (!found && table[k] == pidff_set_condition[PID_PARAM_BLOCK_OFFSET]) {
>  			pr_debug("PBO field not found, but that's OK\n");
>  			pr_debug("Setting MISSING_PBO quirk\n");
>  			return_value |= HID_PIDFF_QUIRK_MISSING_PBO;
> -		}
> -		else if (!found && strict) {
> +		} else if (!found && strict) {
>  			pr_debug("failed to locate %d\n", k);
>  			return -1;
>  		}
> @@ -993,9 +987,7 @@ static int pidff_find_fields(struct pidff_usage *usage, const u8 *table,
>   */
>  static int pidff_check_usage(int usage)
>  {
> -	int i;
> -
> -	for (i = 0; i < sizeof(pidff_reports); i++)
> +	for (int i = 0; i < sizeof(pidff_reports); i++)
>  		if (usage == (HID_UP_PID | pidff_reports[i]))
>  			return i;
>  
> @@ -1010,13 +1002,14 @@ static void pidff_find_reports(struct hid_device *hid, int report_type,
>  			       struct pidff_device *pidff)
>  {
>  	struct hid_report *report;
> -	int i, ret;
>  
>  	list_for_each_entry(report,
>  			    &hid->report_enum[report_type].report_list, list) {
>  		if (report->maxfield < 1)
>  			continue;
> -		ret = pidff_check_usage(report->field[0]->logical);
> +
> +		int ret = pidff_check_usage(report->field[0]->logical);
> +
>  		if (ret != -1) {
>  			hid_dbg(hid, "found usage 0x%02x from field->logical\n",
>  				pidff_reports[ret]);
> @@ -1031,7 +1024,8 @@ static void pidff_find_reports(struct hid_device *hid, int report_type,
>  		 * implementation hides this fact, so we have to dig it up
>  		 * ourselves
>  		 */
> -		i = report->field[0]->usage[0].collection_index;
> +		int i = report->field[0]->usage[0].collection_index;
> +
>  		if (i <= 0 ||
>  		    hid->collection[i - 1].type != HID_COLLECTION_LOGICAL)
>  			continue;
> @@ -1050,9 +1044,7 @@ static void pidff_find_reports(struct hid_device *hid, int report_type,
>   */
>  static int pidff_reports_ok(struct pidff_device *pidff)
>  {
> -	int i;
> -
> -	for (i = 0; i <= PID_REQUIRED_REPORTS; i++) {
> +	for (int i = 0; i <= PID_REQUIRED_REPORTS; i++) {
>  		if (!pidff->reports[i]) {
>  			hid_dbg(pidff->hid, "%d missing\n", i);
>  			return 0;
> @@ -1069,22 +1061,19 @@ static struct hid_field *pidff_find_special_field(struct hid_report *report,
>  						  int usage, int enforce_min)
>  {
>  	if (!report) {
> -		pr_debug("pidff_find_special_field, null report\n");
> +		pr_debug("%s, null report\n", __func__);
>  		return NULL;
>  	}
>  
> -	int i;
> -
> -	for (i = 0; i < report->maxfield; i++) {
> +	for (int i = 0; i < report->maxfield; i++) {
>  		if (report->field[i]->logical == (HID_UP_PID | usage) &&
>  		    report->field[i]->report_count > 0) {
>  			if (!enforce_min ||
>  			    report->field[i]->logical_minimum == 1)
>  				return report->field[i];
> -			else {
> -				pr_err("logical_minimum is not 1 as it should be\n");
> -				return NULL;
> -			}
> +
> +			pr_err("logical_minimum is not 1 as it should be\n");
> +			return NULL;
>  		}
>  	}
>  	return NULL;
> @@ -1096,12 +1085,10 @@ static struct hid_field *pidff_find_special_field(struct hid_report *report,
>  static int pidff_find_special_keys(int *keys, struct hid_field *fld,
>  				   const u8 *usagetable, int count)
>  {
> -
> -	int i, j;
>  	int found = 0;
>  
> -	for (i = 0; i < count; i++) {
> -		for (j = 0; j < fld->maxusage; j++) {
> +	for (int i = 0; i < count; i++) {
> +		for (int j = 0; j < fld->maxusage; j++) {
>  			if (fld->usage[j].hid == (HID_UP_PID | usagetable[i])) {
>  				keys[i] = j + 1;
>  				found++;
> @@ -1203,10 +1190,9 @@ static int pidff_find_special_fields(struct pidff_device *pidff)
>  static int pidff_find_effects(struct pidff_device *pidff,
>  			      struct input_dev *dev)
>  {
> -	int i;
> -
> -	for (i = 0; i < sizeof(pidff_effect_types); i++) {
> +	for (int i = 0; i < sizeof(pidff_effect_types); i++) {
>  		int pidff_type = pidff->type_id[i];
> +
>  		if (pidff->set_effect_type->usage[pidff_type].hid !=
>  		    pidff->create_new_effect_type->usage[pidff_type].hid) {
>  			hid_err(pidff->hid,
> @@ -1355,8 +1341,6 @@ static int pidff_init_fields(struct pidff_device *pidff, struct input_dev *dev)
>  static int pidff_check_autocenter(struct pidff_device *pidff,
>  				  struct input_dev *dev)
>  {
> -	int error;
> -
>  	/*
>  	 * Let's find out if autocenter modification is supported
>  	 * Specification doesn't specify anything, so we request an
> @@ -1364,8 +1348,8 @@ static int pidff_check_autocenter(struct pidff_device *pidff,
>  	 * effect id was one above the minimum, then we assume the first
>  	 * effect id is a built-in spring type effect used for autocenter
>  	 */
> +	int error = pidff_request_effect_upload(pidff, 1);
>  
> -	error = pidff_request_effect_upload(pidff, 1);
>  	if (error) {
>  		hid_err(pidff->hid, "upload request failed\n");
>  		return error;
> @@ -1395,8 +1379,6 @@ int hid_pidff_init_with_quirks(struct hid_device *hid, u32 initial_quirks)
>  	struct hid_input *hidinput = list_entry(hid->inputs.next,
>  						struct hid_input, list);
>  	struct input_dev *dev = hidinput->input;
> -	struct ff_device *ff;
> -	int max_effects;
>  	int error;
>  
>  	hid_dbg(hid, "starting pid init\n");
> @@ -1436,12 +1418,12 @@ int hid_pidff_init_with_quirks(struct hid_device *hid, u32 initial_quirks)
>  	if (error)
>  		goto fail;
>  
> -	max_effects =
> +	int max_effects =
>  	    pidff->block_load[PID_EFFECT_BLOCK_INDEX].field->logical_maximum -
>  	    pidff->block_load[PID_EFFECT_BLOCK_INDEX].field->logical_minimum +
>  	    1;
> -	hid_dbg(hid, "max effects is %d\n", max_effects);
>  
> +	hid_dbg(hid, "max effects is %d\n", max_effects);
>  	if (max_effects > PID_EFFECTS_MAX)
>  		max_effects = PID_EFFECTS_MAX;
>  
> @@ -1465,7 +1447,8 @@ int hid_pidff_init_with_quirks(struct hid_device *hid, u32 initial_quirks)
>  	if (error)
>  		goto fail;
>  
> -	ff = dev->ff;
> +	struct ff_device *ff = dev->ff;
> +
>  	ff->private = pidff;
>  	ff->upload = pidff_upload_effect;
>  	ff->erase = pidff_erase_effect;
> diff --git a/drivers/hid/usbhid/hid-pidff.h b/drivers/hid/usbhid/hid-pidff.h
> index dda571e0a5bd..bfb97cb84f18 100644
> --- a/drivers/hid/usbhid/hid-pidff.h
> +++ b/drivers/hid/usbhid/hid-pidff.h
> @@ -10,7 +10,8 @@
>  #define HID_PIDFF_QUIRK_MISSING_DELAY		BIT(0)
>  
>  /* Missing Paramter block offset (0x23). Skip it during SET_CONDITION
> -   report upload */
> + * report upload
> + */
>  #define HID_PIDFF_QUIRK_MISSING_PBO		BIT(1)
>  
>  /* Initialise device control field even if logical_minimum != 1 */
> -- 
> 2.49.0
> 
> 

Hi,

This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent him
a patch that has triggered this response.  He used to manually respond
to these common problems, but in order to save his sanity (he kept
writing the same thing over and over, yet to different people), I was
created.  Hopefully you will not take offence and will fix the problem
in your patch and resubmit it so that it can be accepted into the Linux
kernel tree.

You are receiving this message because of the following common error(s)
as indicated below:

- Your patch did many different things all at once, making it difficult
  to review.  All Linux kernel patches need to only do one thing at a
  time.  If you need to do multiple things (such as clean up all coding
  style issues in a file/driver), do it in a sequence of patches, each
  one doing only one thing.  This will make it easier to review the
  patches to ensure that they are correct, and to help alleviate any
  merge issues that larger patches can cause.

- You did not specify a description of why the patch is needed, or
  possibly, any description at all, in the email body.  Please read the
  section entitled "The canonical patch format" in the kernel file,
  Documentation/process/submitting-patches.rst for what is needed in
  order to properly describe the change.

- You did not write a descriptive Subject: for the patch, allowing Greg,
  and everyone else, to know what this patch is all about.  Please read
  the section entitled "The canonical patch format" in the kernel file,
  Documentation/process/submitting-patches.rst for what a proper
  Subject: line should look like.

If you wish to discuss this problem further, or you have questions about
how to resolve this issue, please feel free to respond to this email and
Greg will reply once he has dug out from the pending patches received
from other developers.

thanks,

greg k-h's patch email bot