[PATCH 0/2] HID-picoLCD: Adjustments for three function implementations

[PATCH 0/2] HID-picoLCD: Adjustments for three function implementations

[SF Markus Elfring]

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sat, 3 Feb 2018 21:12:24 +0100

Two update suggestions were taken into account
from static source code analysis.

Markus Elfring (2):
  Delete an error message for a failed memory allocation in three functions
  Improve a size determination in picolcd_probe()

 drivers/hid/hid-picolcd_core.c | 3 +--
 drivers/hid/hid-picolcd_fb.c   | 5 ++---
 drivers/hid/hid-picolcd_leds.c | 1 -
 3 files changed, 3 insertions(+), 6 deletions(-)

-- 
2.16.1

[PATCH 1/2] HID: picoLCD: Delete an error message for a failed memory allocation in three functions

[SF Markus Elfring]

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sat, 3 Feb 2018 21:00:37 +0100

Omit an extra message for a memory allocation failure in these functions.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
 drivers/hid/hid-picolcd_core.c | 1 -
 drivers/hid/hid-picolcd_fb.c   | 5 ++---
 drivers/hid/hid-picolcd_leds.c | 1 -
 3 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/hid/hid-picolcd_core.c b/drivers/hid/hid-picolcd_core.c
index c1b29a9eb41a..5dc48ecc1b98 100644
--- a/drivers/hid/hid-picolcd_core.c
+++ b/drivers/hid/hid-picolcd_core.c
@@ -549,7 +549,6 @@ static int picolcd_probe(struct hid_device *hdev,
 	 */
 	data = kzalloc(sizeof(struct picolcd_data), GFP_KERNEL);
 	if (data == NULL) {
-		hid_err(hdev, "can't allocate space for Minibox PicoLCD device data\n");
 		error = -ENOMEM;
 		goto err_no_cleanup;
 	}
diff --git a/drivers/hid/hid-picolcd_fb.c b/drivers/hid/hid-picolcd_fb.c
index 7f965e231433..5fb0b67b8d59 100644
--- a/drivers/hid/hid-picolcd_fb.c
+++ b/drivers/hid/hid-picolcd_fb.c
@@ -548,10 +548,9 @@ int picolcd_init_framebuffer(struct picolcd_data *data)
 	fbdata->force   = 1;
 	fbdata->vbitmap = info->par + sizeof(struct picolcd_fb_data);
 	fbdata->bitmap  = vmalloc(PICOLCDFB_SIZE*8);
-	if (fbdata->bitmap == NULL) {
-		dev_err(dev, "can't get a free page for framebuffer\n");
+	if (!fbdata->bitmap)
 		goto err_nomem;
-	}
+
 	info->screen_base = (char __force __iomem *)fbdata->bitmap;
 	info->fix.smem_start = (unsigned long)fbdata->bitmap;
 	memset(fbdata->vbitmap, 0xff, PICOLCDFB_SIZE);
diff --git a/drivers/hid/hid-picolcd_leds.c b/drivers/hid/hid-picolcd_leds.c
index a802b4f49c7b..871cad90730a 100644
--- a/drivers/hid/hid-picolcd_leds.c
+++ b/drivers/hid/hid-picolcd_leds.c
@@ -122,7 +122,6 @@ int picolcd_init_leds(struct picolcd_data *data, struct hid_report *report)
 	for (i = 0; i < 8; i++) {
 		led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
 		if (!led) {
-			dev_err(dev, "can't allocate memory for LED %d\n", i);
 			ret = -ENOMEM;
 			goto err;
 		}
-- 
2.16.1

[PATCH 2/2] HID: picoLCD: Improve a size determination in picolcd_probe()

[SF Markus Elfring]

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sat, 3 Feb 2018 21:05:55 +0100

Replace the specification of a data structure by a pointer dereference
as the parameter for the operator "sizeof" to make the corresponding size
determination a bit safer according to the Linux coding style convention.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
 drivers/hid/hid-picolcd_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hid/hid-picolcd_core.c b/drivers/hid/hid-picolcd_core.c
index 5dc48ecc1b98..ff38016be6fb 100644
--- a/drivers/hid/hid-picolcd_core.c
+++ b/drivers/hid/hid-picolcd_core.c
@@ -547,7 +547,7 @@ static int picolcd_probe(struct hid_device *hdev,
 	 * Let's allocate the picolcd data structure, set some reasonable
 	 * defaults, and associate it with the device
 	 */
-	data = kzalloc(sizeof(struct picolcd_data), GFP_KERNEL);
+	data = kzalloc(sizeof(*data), GFP_KERNEL);
 	if (data == NULL) {
 		error = -ENOMEM;
 		goto err_no_cleanup;
-- 
2.16.1