diff mbox series

phy: usb: free the buffer after reading a given nvmem cell

Message ID 1662445382-29879-1-git-send-email-vincent.sunplus@gmail.com
State New
Headers show
Series phy: usb: free the buffer after reading a given nvmem cell | expand

Commit Message

Vincent Shih Sept. 6, 2022, 6:23 a.m. UTC 
Use kfree() to free the buffer after calling nvmem_cell_read() to
read a given nvmem cell.

Fixes:99d9ccd97385("phy: usb: Add USB2.0 phy driver for Sunplus SP7021")
Signed-off-by: Vincent Shih <vincent.sunplus@gmail.com>
---
 drivers/phy/sunplus/phy-sunplus-usb2.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/drivers/phy/sunplus/phy-sunplus-usb2.c b/drivers/phy/sunplus/phy-sunplus-usb2.c
index 5269968..c8540e1 100644
--- a/drivers/phy/sunplus/phy-sunplus-usb2.c
+++ b/drivers/phy/sunplus/phy-sunplus-usb2.c
@@ -13,6 +13,7 @@ 
 #include <linux/bitfield.h>
 #include <linux/clk.h>
 #include <linux/delay.h>
+#include <linux/err.h>
 #include <linux/io.h>
 #include <linux/module.h>
 #include <linux/nvmem-consumer.h>
@@ -92,13 +93,15 @@  static int update_disc_vol(struct sp_usbphy *usbphy)
 	otp_v = nvmem_cell_read(cell, &otp_l);
 	nvmem_cell_put(cell);
 
-	if (otp_v) {
+	if (!IS_ERR(otp_v)) {
 		set = *(otp_v + 1);
 		set = (set << (sizeof(char) * 8)) | *otp_v;
 		set = (set >> usbphy->disc_vol_addr_off) & J_DISC;
+		
+		kfree(otp_v);
 	}
-
-	if (!otp_v || set == 0)
+	
+	if (IS_ERR(otp_v) || (set == 0))
 		set = OTP_DISC_LEVEL_DEFAULT;
 
 	val = readl(usbphy->phy_regs + CONFIG7);
@@ -294,3 +297,4 @@  module_platform_driver(sunplus_usb_phy_driver);
 MODULE_AUTHOR("Vincent Shih <vincent.shih@sunplus.com>");
 MODULE_DESCRIPTION("Sunplus USB 2.0 phy driver");
 MODULE_LICENSE("GPL");
+