[PATCH 0/2] fpga: dfl: clean up string formatting for sysfs_emit() and dev_dbg()

[PATCH 0/2] fpga: dfl: clean up string formatting for sysfs_emit() and dev_dbg()

[Peter Colberg]

The first patch in this series substitutes sysfs_emit() for sprintf()
and scnprintf() to format sysfs values and removes explicit casts in
favour of using the correct printk() format specifiers. The second patch
omits unneeded casts of u64 values to unsigned long long for dev_dbg().

These changes are cosmetic only; no functional changes.

Peter Colberg (2):
  fpga: dfl: use sysfs_emit() to format sysfs values
  fpga: dfl: omit unneeded casts of u64 values for dev_dbg()

 drivers/fpga/dfl-afu-dma-region.c | 14 ++++++--------
 drivers/fpga/dfl-afu-error.c      |  7 +++----
 drivers/fpga/dfl-afu-main.c       | 21 +++++++++------------
 drivers/fpga/dfl-fme-error.c      | 19 ++++++++-----------
 drivers/fpga/dfl-fme-main.c       | 26 ++++++++++----------------
 drivers/fpga/dfl-fme-mgr.c        |  5 ++---
 drivers/fpga/dfl-fme-perf.c       | 16 +++++++---------
 drivers/fpga/dfl.c                |  4 ++--
 drivers/fpga/fpga-bridge.c        |  2 +-
 drivers/fpga/fpga-mgr.c           |  4 ++--
 drivers/fpga/fpga-region.c        |  5 ++---
 11 files changed, 52 insertions(+), 71 deletions(-)

-- 
2.28.0

[PATCH 1/2] fpga: dfl: use sysfs_emit() to format sysfs values

[Peter Colberg]

Use sysfs_emit() to format sysfs values, which wraps vscnprintf() for a
PAGE_SIZE buffer. Remove explicit casts in favour of using the printk()
format specifier corresponding to the type of the formatted value.

These changes are cosmetic only; no functional changes.

Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Peter Colberg <peter.colberg@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/fpga/dfl-afu-error.c |  7 +++----
 drivers/fpga/dfl-afu-main.c  | 17 ++++++++---------
 drivers/fpga/dfl-fme-error.c | 19 ++++++++-----------
 drivers/fpga/dfl-fme-main.c  | 26 ++++++++++----------------
 drivers/fpga/dfl-fme-perf.c  | 16 +++++++---------
 drivers/fpga/dfl.c           |  4 ++--
 drivers/fpga/fpga-bridge.c   |  2 +-
 drivers/fpga/fpga-mgr.c      |  4 ++--
 drivers/fpga/fpga-region.c   |  5 ++---
 9 files changed, 43 insertions(+), 57 deletions(-)

diff --git a/drivers/fpga/dfl-afu-error.c b/drivers/fpga/dfl-afu-error.c
index ab7be6217368..6d113d606560 100644
--- a/drivers/fpga/dfl-afu-error.c
+++ b/drivers/fpga/dfl-afu-error.c
@@ -125,7 +125,7 @@ static ssize_t errors_show(struct device *dev, struct device_attribute *attr,
 	error = readq(base + PORT_ERROR);
 	mutex_unlock(&pdata->lock);
 
-	return sprintf(buf, "0x%llx\n", (unsigned long long)error);
+	return sysfs_emit(buf, "0x%llx\n", error);
 }
 
 static ssize_t errors_store(struct device *dev, struct device_attribute *attr,
@@ -156,7 +156,7 @@ static ssize_t first_error_show(struct device *dev,
 	error = readq(base + PORT_FIRST_ERROR);
 	mutex_unlock(&pdata->lock);
 
-	return sprintf(buf, "0x%llx\n", (unsigned long long)error);
+	return sysfs_emit(buf, "0x%llx\n", error);
 }
 static DEVICE_ATTR_RO(first_error);
 
@@ -175,8 +175,7 @@ static ssize_t first_malformed_req_show(struct device *dev,
 	req1 = readq(base + PORT_MALFORMED_REQ1);
 	mutex_unlock(&pdata->lock);
 
-	return sprintf(buf, "0x%016llx%016llx\n",
-		       (unsigned long long)req1, (unsigned long long)req0);
+	return sysfs_emit(buf, "0x%016llx%016llx\n", req1, req0);
 }
 static DEVICE_ATTR_RO(first_malformed_req);
 
diff --git a/drivers/fpga/dfl-afu-main.c b/drivers/fpga/dfl-afu-main.c
index 7f621e96d3b8..51fdbe8a2f26 100644
--- a/drivers/fpga/dfl-afu-main.c
+++ b/drivers/fpga/dfl-afu-main.c
@@ -155,7 +155,7 @@ id_show(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	int id = port_get_id(to_platform_device(dev));
 
-	return scnprintf(buf, PAGE_SIZE, "%d\n", id);
+	return sysfs_emit(buf, "%d\n", id);
 }
 static DEVICE_ATTR_RO(id);
 
@@ -172,7 +172,7 @@ ltr_show(struct device *dev, struct device_attribute *attr, char *buf)
 	v = readq(base + PORT_HDR_CTRL);
 	mutex_unlock(&pdata->lock);
 
-	return sprintf(buf, "%x\n", (u8)FIELD_GET(PORT_CTRL_LATENCY, v));
+	return sysfs_emit(buf, "%llx\n", FIELD_GET(PORT_CTRL_LATENCY, v));
 }
 
 static ssize_t
@@ -213,7 +213,7 @@ ap1_event_show(struct device *dev, struct device_attribute *attr, char *buf)
 	v = readq(base + PORT_HDR_STS);
 	mutex_unlock(&pdata->lock);
 
-	return sprintf(buf, "%x\n", (u8)FIELD_GET(PORT_STS_AP1_EVT, v));
+	return sysfs_emit(buf, "%llx\n", FIELD_GET(PORT_STS_AP1_EVT, v));
 }
 
 static ssize_t
@@ -251,7 +251,7 @@ ap2_event_show(struct device *dev, struct device_attribute *attr,
 	v = readq(base + PORT_HDR_STS);
 	mutex_unlock(&pdata->lock);
 
-	return sprintf(buf, "%x\n", (u8)FIELD_GET(PORT_STS_AP2_EVT, v));
+	return sysfs_emit(buf, "%llx\n", FIELD_GET(PORT_STS_AP2_EVT, v));
 }
 
 static ssize_t
@@ -288,7 +288,7 @@ power_state_show(struct device *dev, struct device_attribute *attr, char *buf)
 	v = readq(base + PORT_HDR_STS);
 	mutex_unlock(&pdata->lock);
 
-	return sprintf(buf, "0x%x\n", (u8)FIELD_GET(PORT_STS_PWR_STATE, v));
+	return sysfs_emit(buf, "0x%llx\n", FIELD_GET(PORT_STS_PWR_STATE, v));
 }
 static DEVICE_ATTR_RO(power_state);
 
@@ -348,7 +348,7 @@ userclk_freqsts_show(struct device *dev, struct device_attribute *attr,
 	userclk_freqsts = readq(base + PORT_HDR_USRCLK_STS0);
 	mutex_unlock(&pdata->lock);
 
-	return sprintf(buf, "0x%llx\n", (unsigned long long)userclk_freqsts);
+	return sysfs_emit(buf, "0x%llx\n", userclk_freqsts);
 }
 static DEVICE_ATTR_RO(userclk_freqsts);
 
@@ -366,8 +366,7 @@ userclk_freqcntrsts_show(struct device *dev, struct device_attribute *attr,
 	userclk_freqcntrsts = readq(base + PORT_HDR_USRCLK_STS1);
 	mutex_unlock(&pdata->lock);
 
-	return sprintf(buf, "0x%llx\n",
-		       (unsigned long long)userclk_freqcntrsts);
+	return sysfs_emit(buf, "0x%llx\n", userclk_freqcntrsts);
 }
 static DEVICE_ATTR_RO(userclk_freqcntrsts);
 
@@ -472,7 +471,7 @@ afu_id_show(struct device *dev, struct device_attribute *attr, char *buf)
 	guidh = readq(base + GUID_H);
 	mutex_unlock(&pdata->lock);
 
-	return scnprintf(buf, PAGE_SIZE, "%016llx%016llx\n", guidh, guidl);
+	return sysfs_emit(buf, "%016llx%016llx\n", guidh, guidl);
 }
 static DEVICE_ATTR_RO(afu_id);
 
diff --git a/drivers/fpga/dfl-fme-error.c b/drivers/fpga/dfl-fme-error.c
index 51c2892ec06d..a570f294ad82 100644
--- a/drivers/fpga/dfl-fme-error.c
+++ b/drivers/fpga/dfl-fme-error.c
@@ -52,7 +52,7 @@ static ssize_t pcie0_errors_show(struct device *dev,
 	value = readq(base + PCIE0_ERROR);
 	mutex_unlock(&pdata->lock);
 
-	return sprintf(buf, "0x%llx\n", (unsigned long long)value);
+	return sysfs_emit(buf, "0x%llx\n", value);
 }
 
 static ssize_t pcie0_errors_store(struct device *dev,
@@ -97,7 +97,7 @@ static ssize_t pcie1_errors_show(struct device *dev,
 	value = readq(base + PCIE1_ERROR);
 	mutex_unlock(&pdata->lock);
 
-	return sprintf(buf, "0x%llx\n", (unsigned long long)value);
+	return sysfs_emit(buf, "0x%llx\n", value);
 }
 
 static ssize_t pcie1_errors_store(struct device *dev,
@@ -136,8 +136,7 @@ static ssize_t nonfatal_errors_show(struct device *dev,
 
 	base = dfl_get_feature_ioaddr_by_id(dev, FME_FEATURE_ID_GLOBAL_ERR);
 
-	return sprintf(buf, "0x%llx\n",
-		       (unsigned long long)readq(base + RAS_NONFAT_ERROR));
+	return sysfs_emit(buf, "0x%llx\n", readq(base + RAS_NONFAT_ERROR));
 }
 static DEVICE_ATTR_RO(nonfatal_errors);
 
@@ -148,8 +147,7 @@ static ssize_t catfatal_errors_show(struct device *dev,
 
 	base = dfl_get_feature_ioaddr_by_id(dev, FME_FEATURE_ID_GLOBAL_ERR);
 
-	return sprintf(buf, "0x%llx\n",
-		       (unsigned long long)readq(base + RAS_CATFAT_ERROR));
+	return sysfs_emit(buf, "0x%llx\n", readq(base + RAS_CATFAT_ERROR));
 }
 static DEVICE_ATTR_RO(catfatal_errors);
 
@@ -166,8 +164,7 @@ static ssize_t inject_errors_show(struct device *dev,
 	v = readq(base + RAS_ERROR_INJECT);
 	mutex_unlock(&pdata->lock);
 
-	return sprintf(buf, "0x%llx\n",
-		       (unsigned long long)FIELD_GET(INJECT_ERROR_MASK, v));
+	return sysfs_emit(buf, "0x%llx\n", FIELD_GET(INJECT_ERROR_MASK, v));
 }
 
 static ssize_t inject_errors_store(struct device *dev,
@@ -211,7 +208,7 @@ static ssize_t fme_errors_show(struct device *dev,
 	value = readq(base + FME_ERROR);
 	mutex_unlock(&pdata->lock);
 
-	return sprintf(buf, "0x%llx\n", (unsigned long long)value);
+	return sysfs_emit(buf, "0x%llx\n", value);
 }
 
 static ssize_t fme_errors_store(struct device *dev,
@@ -258,7 +255,7 @@ static ssize_t first_error_show(struct device *dev,
 	value = readq(base + FME_FIRST_ERROR);
 	mutex_unlock(&pdata->lock);
 
-	return sprintf(buf, "0x%llx\n", (unsigned long long)value);
+	return sysfs_emit(buf, "0x%llx\n", value);
 }
 static DEVICE_ATTR_RO(first_error);
 
@@ -275,7 +272,7 @@ static ssize_t next_error_show(struct device *dev,
 	value = readq(base + FME_NEXT_ERROR);
 	mutex_unlock(&pdata->lock);
 
-	return sprintf(buf, "0x%llx\n", (unsigned long long)value);
+	return sysfs_emit(buf, "0x%llx\n", value);
 }
 static DEVICE_ATTR_RO(next_error);
 
diff --git a/drivers/fpga/dfl-fme-main.c b/drivers/fpga/dfl-fme-main.c
index bcb5d34b3b82..3b2ad31edf87 100644
--- a/drivers/fpga/dfl-fme-main.c
+++ b/drivers/fpga/dfl-fme-main.c
@@ -34,8 +34,7 @@ static ssize_t ports_num_show(struct device *dev,
 
 	v = readq(base + FME_HDR_CAP);
 
-	return scnprintf(buf, PAGE_SIZE, "%u\n",
-			 (unsigned int)FIELD_GET(FME_CAP_NUM_PORTS, v));
+	return sysfs_emit(buf, "%llu\n", FIELD_GET(FME_CAP_NUM_PORTS, v));
 }
 static DEVICE_ATTR_RO(ports_num);
 
@@ -53,7 +52,7 @@ static ssize_t bitstream_id_show(struct device *dev,
 
 	v = readq(base + FME_HDR_BITSTREAM_ID);
 
-	return scnprintf(buf, PAGE_SIZE, "0x%llx\n", (unsigned long long)v);
+	return sysfs_emit(buf, "0x%llx\n", v);
 }
 static DEVICE_ATTR_RO(bitstream_id);
 
@@ -71,7 +70,7 @@ static ssize_t bitstream_metadata_show(struct device *dev,
 
 	v = readq(base + FME_HDR_BITSTREAM_MD);
 
-	return scnprintf(buf, PAGE_SIZE, "0x%llx\n", (unsigned long long)v);
+	return sysfs_emit(buf, "0x%llx\n", v);
 }
 static DEVICE_ATTR_RO(bitstream_metadata);
 
@@ -85,8 +84,7 @@ static ssize_t cache_size_show(struct device *dev,
 
 	v = readq(base + FME_HDR_CAP);
 
-	return sprintf(buf, "%u\n",
-		       (unsigned int)FIELD_GET(FME_CAP_CACHE_SIZE, v));
+	return sysfs_emit(buf, "%llu\n", FIELD_GET(FME_CAP_CACHE_SIZE, v));
 }
 static DEVICE_ATTR_RO(cache_size);
 
@@ -100,8 +98,7 @@ static ssize_t fabric_version_show(struct device *dev,
 
 	v = readq(base + FME_HDR_CAP);
 
-	return sprintf(buf, "%u\n",
-		       (unsigned int)FIELD_GET(FME_CAP_FABRIC_VERID, v));
+	return sysfs_emit(buf, "%llu\n", FIELD_GET(FME_CAP_FABRIC_VERID, v));
 }
 static DEVICE_ATTR_RO(fabric_version);
 
@@ -115,8 +112,7 @@ static ssize_t socket_id_show(struct device *dev,
 
 	v = readq(base + FME_HDR_CAP);
 
-	return sprintf(buf, "%u\n",
-		       (unsigned int)FIELD_GET(FME_CAP_SOCKET_ID, v));
+	return sysfs_emit(buf, "%llu\n", FIELD_GET(FME_CAP_SOCKET_ID, v));
 }
 static DEVICE_ATTR_RO(socket_id);
 
@@ -285,8 +281,7 @@ static ssize_t temp1_max_policy_show(struct device *dev,
 
 	v = readq(feature->ioaddr + FME_THERM_THRESHOLD);
 
-	return sprintf(buf, "%u\n",
-		       (unsigned int)FIELD_GET(TEMP_THRESHOLD1_POLICY, v));
+	return sysfs_emit(buf, "%llu\n", FIELD_GET(TEMP_THRESHOLD1_POLICY, v));
 }
 
 static DEVICE_ATTR_RO(temp1_max_policy);
@@ -489,7 +484,7 @@ static ssize_t power1_xeon_limit_show(struct device *dev,
 	if (FIELD_GET(XEON_PWR_EN, v))
 		xeon_limit = FIELD_GET(XEON_PWR_LIMIT, v);
 
-	return sprintf(buf, "%u\n", xeon_limit * 100000);
+	return sysfs_emit(buf, "%u\n", xeon_limit * 100000);
 }
 
 static ssize_t power1_fpga_limit_show(struct device *dev,
@@ -504,7 +499,7 @@ static ssize_t power1_fpga_limit_show(struct device *dev,
 	if (FIELD_GET(FPGA_PWR_EN, v))
 		fpga_limit = FIELD_GET(FPGA_PWR_LIMIT, v);
 
-	return sprintf(buf, "%u\n", fpga_limit * 100000);
+	return sysfs_emit(buf, "%u\n", fpga_limit * 100000);
 }
 
 static ssize_t power1_ltr_show(struct device *dev,
@@ -515,8 +510,7 @@ static ssize_t power1_ltr_show(struct device *dev,
 
 	v = readq(feature->ioaddr + FME_PWR_STATUS);
 
-	return sprintf(buf, "%u\n",
-		       (unsigned int)FIELD_GET(FME_LATENCY_TOLERANCE, v));
+	return sysfs_emit(buf, "%llu\n", FIELD_GET(FME_LATENCY_TOLERANCE, v));
 }
 
 static DEVICE_ATTR_RO(power1_xeon_limit);
diff --git a/drivers/fpga/dfl-fme-perf.c b/drivers/fpga/dfl-fme-perf.c
index 7422d2bc6f37..1b072416069b 100644
--- a/drivers/fpga/dfl-fme-perf.c
+++ b/drivers/fpga/dfl-fme-perf.c
@@ -524,20 +524,18 @@ static ssize_t fme_perf_event_show(struct device *dev,
 {
 	struct dev_ext_attribute *eattr;
 	unsigned long config;
-	char *ptr = buf;
 
 	eattr = container_of(attr, struct dev_ext_attribute, attr);
 	config = (unsigned long)eattr->var;
 
-	ptr += sprintf(ptr, "event=0x%02x", (unsigned int)get_event(config));
-	ptr += sprintf(ptr, ",evtype=0x%02x", (unsigned int)get_evtype(config));
+	if (!is_portid_root(get_portid(config)))
+		return sysfs_emit(buf,
+				  "event=0x%02llx,evtype=0x%02llx,portid=?\n",
+				  get_event(config), get_evtype(config));
 
-	if (is_portid_root(get_portid(config)))
-		ptr += sprintf(ptr, ",portid=0x%02x\n", FME_PORTID_ROOT);
-	else
-		ptr += sprintf(ptr, ",portid=?\n");
-
-	return (ssize_t)(ptr - buf);
+	return sysfs_emit(buf, "event=0x%02llx,evtype=0x%02llx,portid=0x%02x\n",
+			  get_event(config), get_evtype(config),
+			  FME_PORTID_ROOT);
 }
 
 #define FME_EVENT_ATTR(_name) \
diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c
index dd7a783d53b5..db8141b68f79 100644
--- a/drivers/fpga/dfl.c
+++ b/drivers/fpga/dfl.c
@@ -307,7 +307,7 @@ type_show(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct dfl_device *ddev = to_dfl_dev(dev);
 
-	return sprintf(buf, "0x%x\n", ddev->type);
+	return sysfs_emit(buf, "0x%x\n", ddev->type);
 }
 static DEVICE_ATTR_RO(type);
 
@@ -316,7 +316,7 @@ feature_id_show(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct dfl_device *ddev = to_dfl_dev(dev);
 
-	return sprintf(buf, "0x%x\n", ddev->feature_id);
+	return sysfs_emit(buf, "0x%x\n", ddev->feature_id);
 }
 static DEVICE_ATTR_RO(feature_id);
 
diff --git a/drivers/fpga/fpga-bridge.c b/drivers/fpga/fpga-bridge.c
index a6c25dee9cc1..9b88c18cc126 100644
--- a/drivers/fpga/fpga-bridge.c
+++ b/drivers/fpga/fpga-bridge.c
@@ -286,7 +286,7 @@ static ssize_t name_show(struct device *dev,
 {
 	struct fpga_bridge *bridge = to_fpga_bridge(dev);
 
-	return sprintf(buf, "%s\n", bridge->name);
+	return sysfs_emit(buf, "%s\n", bridge->name);
 }
 
 static ssize_t state_show(struct device *dev,
diff --git a/drivers/fpga/fpga-mgr.c b/drivers/fpga/fpga-mgr.c
index eb583f86a0b9..b3991f921312 100644
--- a/drivers/fpga/fpga-mgr.c
+++ b/drivers/fpga/fpga-mgr.c
@@ -618,7 +618,7 @@ static ssize_t name_show(struct device *dev,
 {
 	struct fpga_manager *mgr = to_fpga_manager(dev);
 
-	return sprintf(buf, "%s\n", mgr->name);
+	return sysfs_emit(buf, "%s\n", mgr->name);
 }
 
 static ssize_t state_show(struct device *dev,
@@ -626,7 +626,7 @@ static ssize_t state_show(struct device *dev,
 {
 	struct fpga_manager *mgr = to_fpga_manager(dev);
 
-	return sprintf(buf, "%s\n", state_str[mgr->state]);
+	return sysfs_emit(buf, "%s\n", state_str[mgr->state]);
 }
 
 static ssize_t status_show(struct device *dev,
diff --git a/drivers/fpga/fpga-region.c b/drivers/fpga/fpga-region.c
index ccf6fdab1360..7a3572b78f50 100644
--- a/drivers/fpga/fpga-region.c
+++ b/drivers/fpga/fpga-region.c
@@ -166,9 +166,8 @@ static ssize_t compat_id_show(struct device *dev,
 	if (!region->compat_id)
 		return -ENOENT;
 
-	return sprintf(buf, "%016llx%016llx\n",
-		       (unsigned long long)region->compat_id->id_h,
-		       (unsigned long long)region->compat_id->id_l);
+	return sysfs_emit(buf, "%016llx%016llx\n", region->compat_id->id_h,
+			  region->compat_id->id_l);
 }
 
 static DEVICE_ATTR_RO(compat_id);
-- 
2.28.0

[PATCH 2/2] fpga: dfl: omit unneeded casts of u64 values for dev_dbg()

[Peter Colberg]

Omit unneeded casts of u64 values to unsigned long long for use with
printk() format specifier %llx. Unlike user space, the kernel defines
u64 as unsigned long long for all architectures; see commit 2a7930bd77fe
("Documentation/printk-formats.txt: No casts needed for u64/s64").

These changes are cosmetic only; no functional changes.

Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Peter Colberg <peter.colberg@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/fpga/dfl-afu-dma-region.c | 14 ++++++--------
 drivers/fpga/dfl-afu-main.c       |  4 +---
 drivers/fpga/dfl-fme-mgr.c        |  5 ++---
 3 files changed, 9 insertions(+), 14 deletions(-)

diff --git a/drivers/fpga/dfl-afu-dma-region.c b/drivers/fpga/dfl-afu-dma-region.c
index 02b60fde0430..71ed9d394d07 100644
--- a/drivers/fpga/dfl-afu-dma-region.c
+++ b/drivers/fpga/dfl-afu-dma-region.c
@@ -146,8 +146,7 @@ static int afu_dma_region_add(struct dfl_feature_platform_data *pdata,
 	struct dfl_afu *afu = dfl_fpga_pdata_get_private(pdata);
 	struct rb_node **new, *parent = NULL;
 
-	dev_dbg(&pdata->dev->dev, "add region (iova = %llx)\n",
-		(unsigned long long)region->iova);
+	dev_dbg(&pdata->dev->dev, "add region (iova = %llx)\n", region->iova);
 
 	new = &afu->dma_regions.rb_node;
 
@@ -187,8 +186,7 @@ static void afu_dma_region_remove(struct dfl_feature_platform_data *pdata,
 {
 	struct dfl_afu *afu;
 
-	dev_dbg(&pdata->dev->dev, "del region (iova = %llx)\n",
-		(unsigned long long)region->iova);
+	dev_dbg(&pdata->dev->dev, "del region (iova = %llx)\n", region->iova);
 
 	afu = dfl_fpga_pdata_get_private(pdata);
 	rb_erase(&region->node, &afu->dma_regions);
@@ -210,7 +208,7 @@ void afu_dma_region_destroy(struct dfl_feature_platform_data *pdata)
 		region = container_of(node, struct dfl_afu_dma_region, node);
 
 		dev_dbg(&pdata->dev->dev, "del region (iova = %llx)\n",
-			(unsigned long long)region->iova);
+			region->iova);
 
 		rb_erase(node, &afu->dma_regions);
 
@@ -255,7 +253,7 @@ afu_dma_region_find(struct dfl_feature_platform_data *pdata, u64 iova, u64 size)
 
 		if (dma_region_check_iova(region, iova, size)) {
 			dev_dbg(dev, "find region (iova = %llx)\n",
-				(unsigned long long)region->iova);
+				region->iova);
 			return region;
 		}
 
@@ -268,8 +266,8 @@ afu_dma_region_find(struct dfl_feature_platform_data *pdata, u64 iova, u64 size)
 			break;
 	}
 
-	dev_dbg(dev, "region with iova %llx and size %llx is not found\n",
-		(unsigned long long)iova, (unsigned long long)size);
+	dev_dbg(dev, "region with iova %llx and size %llx is not found\n", iova,
+		size);
 
 	return NULL;
 }
diff --git a/drivers/fpga/dfl-afu-main.c b/drivers/fpga/dfl-afu-main.c
index 51fdbe8a2f26..f81b44767c31 100644
--- a/drivers/fpga/dfl-afu-main.c
+++ b/drivers/fpga/dfl-afu-main.c
@@ -729,9 +729,7 @@ afu_ioctl_dma_map(struct dfl_feature_platform_data *pdata, void __user *arg)
 	}
 
 	dev_dbg(&pdata->dev->dev, "dma map: ua=%llx, len=%llx, iova=%llx\n",
-		(unsigned long long)map.user_addr,
-		(unsigned long long)map.length,
-		(unsigned long long)map.iova);
+		map.user_addr, map.length, map.iova);
 
 	return 0;
 }
diff --git a/drivers/fpga/dfl-fme-mgr.c b/drivers/fpga/dfl-fme-mgr.c
index af0785783b52..7fb7a0aca1dc 100644
--- a/drivers/fpga/dfl-fme-mgr.c
+++ b/drivers/fpga/dfl-fme-mgr.c
@@ -150,7 +150,7 @@ static int fme_mgr_write_init(struct fpga_manager *mgr,
 	priv->pr_error = fme_mgr_pr_error_handle(fme_pr);
 	if (priv->pr_error)
 		dev_dbg(dev, "previous PR error detected %llx\n",
-			(unsigned long long)priv->pr_error);
+			priv->pr_error);
 
 	dev_dbg(dev, "set PR port ID\n");
 
@@ -242,8 +242,7 @@ static int fme_mgr_write_complete(struct fpga_manager *mgr,
 	dev_dbg(dev, "PR operation complete, checking status\n");
 	priv->pr_error = fme_mgr_pr_error_handle(fme_pr);
 	if (priv->pr_error) {
-		dev_dbg(dev, "PR error detected %llx\n",
-			(unsigned long long)priv->pr_error);
+		dev_dbg(dev, "PR error detected %llx\n", priv->pr_error);
 		return -EIO;
 	}
 
-- 
2.28.0

Re: [PATCH 1/2] fpga: dfl: use sysfs_emit() to format sysfs values

[Xu Yilun]

On 2023-07-04 at 22:54:50 -0400, Peter Colberg wrote:
> Use sysfs_emit() to format sysfs values, which wraps vscnprintf() for a
> PAGE_SIZE buffer. Remove explicit casts in favour of using the printk()
> format specifier corresponding to the type of the formatted value.
> 
> These changes are cosmetic only; no functional changes.
> 
> Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> Signed-off-by: Peter Colberg <peter.colberg@intel.com>
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> ---
>  drivers/fpga/dfl-afu-error.c |  7 +++----
>  drivers/fpga/dfl-afu-main.c  | 17 ++++++++---------
>  drivers/fpga/dfl-fme-error.c | 19 ++++++++-----------
>  drivers/fpga/dfl-fme-main.c  | 26 ++++++++++----------------
>  drivers/fpga/dfl-fme-perf.c  | 16 +++++++---------
>  drivers/fpga/dfl.c           |  4 ++--
>  drivers/fpga/fpga-bridge.c   |  2 +-
>  drivers/fpga/fpga-mgr.c      |  4 ++--
>  drivers/fpga/fpga-region.c   |  5 ++---
>  9 files changed, 43 insertions(+), 57 deletions(-)
>
[...]
 
> diff --git a/drivers/fpga/dfl-fme-perf.c b/drivers/fpga/dfl-fme-perf.c
> index 7422d2bc6f37..1b072416069b 100644
> --- a/drivers/fpga/dfl-fme-perf.c
> +++ b/drivers/fpga/dfl-fme-perf.c
> @@ -524,20 +524,18 @@ static ssize_t fme_perf_event_show(struct device *dev,
>  {
>  	struct dev_ext_attribute *eattr;
>  	unsigned long config;
> -	char *ptr = buf;
>  
>  	eattr = container_of(attr, struct dev_ext_attribute, attr);
>  	config = (unsigned long)eattr->var;
>  
> -	ptr += sprintf(ptr, "event=0x%02x", (unsigned int)get_event(config));
> -	ptr += sprintf(ptr, ",evtype=0x%02x", (unsigned int)get_evtype(config));
> +	if (!is_portid_root(get_portid(config)))
> +		return sysfs_emit(buf,
> +				  "event=0x%02llx,evtype=0x%02llx,portid=?\n",
                                              ^               ^
why llx, should be lx?

> +				  get_event(config), get_evtype(config));
>  
> -	if (is_portid_root(get_portid(config)))
> -		ptr += sprintf(ptr, ",portid=0x%02x\n", FME_PORTID_ROOT);
> -	else
> -		ptr += sprintf(ptr, ",portid=?\n");
> -
> -	return (ssize_t)(ptr - buf);
> +	return sysfs_emit(buf, "event=0x%02llx,evtype=0x%02llx,portid=0x%02x\n",

same

> +			  get_event(config), get_evtype(config),
> +			  FME_PORTID_ROOT);

BTW, have you ever tested with perf tool? The perf sysfs is a little
tricky to make perf work. I'm not sure everything is fine with naked
eyes.

Thanks,
Yilun