diff mbox series

[v2] scsi/qla4xxx: convert sysfs sprintf/snprintf family to sysfs_emit/sysfs_emit_at

Message ID 1611201437-111938-1-git-send-email-abaci-bugfix@linux.alibaba.com (mailing list archive)
State Superseded
Headers show
Series [v2] scsi/qla4xxx: convert sysfs sprintf/snprintf family to sysfs_emit/sysfs_emit_at | expand

Commit Message

Abaci Team Jan. 21, 2021, 3:57 a.m. UTC 
Fix the following coccicheck warning:

./drivers/scsi/qla4xxx/ql4_attr.c: WARNING: use scnprintf or
sprintf.

Reported-by: Abaci Robot<abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Zhong <abaci-bugfix@linux.alibaba.com>
---
Changes in v2:
  - convert snprintf family to sysfs_emit_at.

 drivers/scsi/qla4xxx/ql4_attr.c | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

Comments

Bart Van Assche Jan. 21, 2021, 4:55 a.m. UTC | #1 
On 1/20/21 7:57 PM, Jiapeng Zhong wrote:
> -		return snprintf(buf, PAGE_SIZE, "%d.%02d.%02d (%x)\n",
> +		return sysfs_emit_at(buf, PAGE_SIZE, "%d.%02d.%02d (%x)\n",
>  				ha->fw_info.fw_major, ha->fw_info.fw_minor,
>  				ha->fw_info.fw_patch, ha->fw_info.fw_build);

From the sysfs_emit_at() source code:

WARN(... || at >= PAGE_SIZE, "invalid sysfs_emit_at: buf:%p at:%d\n",
buf, at)

In other words, this patch is wrong. sysfs_emit() should have been used
instead of sysfs_emit_at().

Bart.
Joe Perches Jan. 21, 2021, 5:15 a.m. UTC | #2 
On Wed, 2021-01-20 at 20:55 -0800, Bart Van Assche wrote:
> On 1/20/21 7:57 PM, Jiapeng Zhong wrote:
> > -		return snprintf(buf, PAGE_SIZE, "%d.%02d.%02d (%x)\n",
> > +		return sysfs_emit_at(buf, PAGE_SIZE, "%d.%02d.%02d (%x)\n",
> >  				ha->fw_info.fw_major, ha->fw_info.fw_minor,
> >  				ha->fw_info.fw_patch, ha->fw_info.fw_build);
> 
> From the sysfs_emit_at() source code:
> 
> WARN(... || at >= PAGE_SIZE, "invalid sysfs_emit_at: buf:%p at:%d\n",
> buf, at)
> 
> In other words, this patch is wrong. sysfs_emit() should have been used
> instead of sysfs_emit_at().

Instead, use the cocci script from

commit aa838896d87a ("drivers core: Use sysfs_emit and sysfs_emit_at for
show(device *...) functions")
diff mbox series

Patch

diff --git a/drivers/scsi/qla4xxx/ql4_attr.c b/drivers/scsi/qla4xxx/ql4_attr.c
index ec43528..ad9b021 100644
--- a/drivers/scsi/qla4xxx/ql4_attr.c
+++ b/drivers/scsi/qla4xxx/ql4_attr.c
@@ -156,11 +156,11 @@  void qla4_8xxx_free_sysfs_attr(struct scsi_qla_host *ha)
 	struct scsi_qla_host *ha = to_qla_host(class_to_shost(dev));
 
 	if (is_qla80XX(ha))
-		return snprintf(buf, PAGE_SIZE, "%d.%02d.%02d (%x)\n",
+		return sysfs_emit_at(buf, PAGE_SIZE, "%d.%02d.%02d (%x)\n",
 				ha->fw_info.fw_major, ha->fw_info.fw_minor,
 				ha->fw_info.fw_patch, ha->fw_info.fw_build);
 	else
-		return snprintf(buf, PAGE_SIZE, "%d.%02d.%02d.%02d\n",
+		return sysfs_emit_at(buf, PAGE_SIZE, "%d.%02d.%02d.%02d\n",
 				ha->fw_info.fw_major, ha->fw_info.fw_minor,
 				ha->fw_info.fw_patch, ha->fw_info.fw_build);
 }
@@ -170,7 +170,7 @@  void qla4_8xxx_free_sysfs_attr(struct scsi_qla_host *ha)
 			char *buf)
 {
 	struct scsi_qla_host *ha = to_qla_host(class_to_shost(dev));
-	return snprintf(buf, PAGE_SIZE, "%s\n", ha->serial_number);
+	return sysfs_emit_at(buf, PAGE_SIZE, "%s\n", ha->serial_number);
 }
 
 static ssize_t
@@ -178,7 +178,7 @@  void qla4_8xxx_free_sysfs_attr(struct scsi_qla_host *ha)
 			   char *buf)
 {
 	struct scsi_qla_host *ha = to_qla_host(class_to_shost(dev));
-	return snprintf(buf, PAGE_SIZE, "%d.%02d\n", ha->fw_info.iscsi_major,
+	return sysfs_emit_at(buf, PAGE_SIZE, "%d.%02d\n", ha->fw_info.iscsi_major,
 			ha->fw_info.iscsi_minor);
 }
 
@@ -187,7 +187,7 @@  void qla4_8xxx_free_sysfs_attr(struct scsi_qla_host *ha)
 			    char *buf)
 {
 	struct scsi_qla_host *ha = to_qla_host(class_to_shost(dev));
-	return snprintf(buf, PAGE_SIZE, "%d.%02d.%02d.%02d\n",
+	return sysfs_emit_at(buf, PAGE_SIZE, "%d.%02d.%02d.%02d\n",
 			ha->fw_info.bootload_major, ha->fw_info.bootload_minor,
 			ha->fw_info.bootload_patch, ha->fw_info.bootload_build);
 }
@@ -197,7 +197,7 @@  void qla4_8xxx_free_sysfs_attr(struct scsi_qla_host *ha)
 		      char *buf)
 {
 	struct scsi_qla_host *ha = to_qla_host(class_to_shost(dev));
-	return snprintf(buf, PAGE_SIZE, "0x%08X\n", ha->board_id);
+	return sysfs_emit_at(buf, PAGE_SIZE, "0x%08X\n", ha->board_id);
 }
 
 static ssize_t
@@ -207,7 +207,7 @@  void qla4_8xxx_free_sysfs_attr(struct scsi_qla_host *ha)
 	struct scsi_qla_host *ha = to_qla_host(class_to_shost(dev));
 
 	qla4xxx_get_firmware_state(ha);
-	return snprintf(buf, PAGE_SIZE, "0x%08X%8X\n", ha->firmware_state,
+	return sysfs_emit_at(buf, PAGE_SIZE, "0x%08X%8X\n", ha->firmware_state,
 			ha->addl_fw_state);
 }
 
@@ -220,7 +220,7 @@  void qla4_8xxx_free_sysfs_attr(struct scsi_qla_host *ha)
 	if (is_qla40XX(ha))
 		return -ENOSYS;
 
-	return snprintf(buf, PAGE_SIZE, "0x%04X\n", ha->phy_port_cnt);
+	return sysfs_emit_at(buf, PAGE_SIZE, "0x%04X\n", ha->phy_port_cnt);
 }
 
 static ssize_t
@@ -232,7 +232,7 @@  void qla4_8xxx_free_sysfs_attr(struct scsi_qla_host *ha)
 	if (is_qla40XX(ha))
 		return -ENOSYS;
 
-	return snprintf(buf, PAGE_SIZE, "0x%04X\n", ha->phy_port_num);
+	return sysfs_emit_at(buf, PAGE_SIZE, "0x%04X\n", ha->phy_port_num);
 }
 
 static ssize_t
@@ -244,7 +244,7 @@  void qla4_8xxx_free_sysfs_attr(struct scsi_qla_host *ha)
 	if (is_qla40XX(ha))
 		return -ENOSYS;
 
-	return snprintf(buf, PAGE_SIZE, "0x%04X\n", ha->iscsi_pci_func_cnt);
+	return sysfs_emit_at(buf, PAGE_SIZE, "0x%04X\n", ha->iscsi_pci_func_cnt);
 }
 
 static ssize_t
@@ -253,7 +253,7 @@  void qla4_8xxx_free_sysfs_attr(struct scsi_qla_host *ha)
 {
 	struct scsi_qla_host *ha = to_qla_host(class_to_shost(dev));
 
-	return snprintf(buf, PAGE_SIZE, "%s\n", ha->model_name);
+	return sysfs_emit_at(buf, PAGE_SIZE, "%s\n", ha->model_name);
 }
 
 static ssize_t
@@ -261,7 +261,7 @@  void qla4_8xxx_free_sysfs_attr(struct scsi_qla_host *ha)
 			  char *buf)
 {
 	struct scsi_qla_host *ha = to_qla_host(class_to_shost(dev));
-	return snprintf(buf, PAGE_SIZE, "%s %s\n", ha->fw_info.fw_build_date,
+	return sysfs_emit_at(buf, PAGE_SIZE, "%s %s\n", ha->fw_info.fw_build_date,
 			ha->fw_info.fw_build_time);
 }
 
@@ -309,7 +309,7 @@  void qla4_8xxx_free_sysfs_attr(struct scsi_qla_host *ha)
 {
 	struct scsi_qla_host *ha = to_qla_host(class_to_shost(dev));
 	qla4xxx_about_firmware(ha);
-	return snprintf(buf, PAGE_SIZE, "%u.%u secs\n", ha->fw_uptime_secs,
+	return sysfs_emit_at(buf, PAGE_SIZE, "%u.%u secs\n", ha->fw_uptime_secs,
 			ha->fw_uptime_msecs);
 }