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Fri, 07 Aug 2026 06:17:05 -0700 (PDT) From: Felix Gu Date: Fri, 07 Aug 2026 21:16:59 +0800 Subject: [PATCH v2 1/2] phy: sunplus: fix memory leak in update_disc_vol() Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260807-sunplus-v2-1-d5379c664dfc@gmail.com> References: <20260807-sunplus-v2-0-d5379c664dfc@gmail.com> In-Reply-To: <20260807-sunplus-v2-0-d5379c664dfc@gmail.com> To: Vincent Shih , Vinod Koul , Neil Armstrong Cc: linux-usb@vger.kernel.org, linux-phy@lists.infradead.org, linux-kernel@vger.kernel.org, Felix Gu X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1786108621; l=1371; i=ustc.gu@gmail.com; h=from:subject:message-id; bh=xPOjbbNpgv8zBNu5HQrbZZTFhpVmNKz9dXE/JT36uuQ=; b=JTW1v+NrEfG3ageF7YydDhzejNQjsmSQNOjuS9Rl9sKfpRSZRI8b0wJEZGfP37nq1LPK5ARM9 aoTNAAX+FkvC2CM/DiiP5GLGGoaQ75sakF1XkYrhKmXJf6IifiqgIvK X-Developer-Key: i=ustc.gu@gmail.com; a=ed25519; pk=fjUXwmjchVN7Ja6KGP55IXOzFeCl9edaHoQIEUA+/hw= nvmem_cell_read() returns a kmalloc'd buffer that update_disc_vol() never freed. Free it after extracting the disconnect-voltage value. Fixes: 99d9ccd97385 ("phy: usb: Add USB2.0 phy driver for Sunplus SP7021") Signed-off-by: Felix Gu --- drivers/phy/sunplus/phy-sunplus-usb2.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/phy/sunplus/phy-sunplus-usb2.c b/drivers/phy/sunplus/phy-sunplus-usb2.c index 637a5fbae6d9..842087bdfba5 100644 --- a/drivers/phy/sunplus/phy-sunplus-usb2.c +++ b/drivers/phy/sunplus/phy-sunplus-usb2.c @@ -81,7 +81,7 @@ static int update_disc_vol(struct sp_usbphy *usbphy) char *disc_name = "disc_vol"; ssize_t otp_l = 0; char *otp_v; - u32 val, set; + u32 val, set = OTP_DISC_LEVEL_DEFAULT; cell = nvmem_cell_get(usbphy->dev, disc_name); if (IS_ERR_OR_NULL(cell)) { @@ -96,11 +96,11 @@ static int update_disc_vol(struct sp_usbphy *usbphy) set = *(otp_v + 1); set = (set << (sizeof(char) * 8)) | *otp_v; set = (set >> usbphy->disc_vol_addr_off) & J_DISC; + if (set == 0) + set = OTP_DISC_LEVEL_DEFAULT; + kfree(otp_v); } - if (IS_ERR(otp_v) || set == 0) - set = OTP_DISC_LEVEL_DEFAULT; - val = readl(usbphy->phy_regs + CONFIG7); val = (val & ~J_DISC) | set; writel(val, usbphy->phy_regs + CONFIG7); -- 2.43.0