diff mbox series

[v2] usb: gadget: udc: replace kzalloc with devm_kzalloc in mv_udc_probe and add a check for this allocation.

Message ID 20230224143148.60-1-void0red@gmail.com
State Superseded
Headers show
Series [v2] usb: gadget: udc: replace kzalloc with devm_kzalloc in mv_udc_probe and add a check for this allocation. | expand

Commit Message

void0red Feb. 24, 2023, 2:31 p.m. UTC 
From: Kang Chen <void0red@gmail.com>

This driver uses the unified memory management api, so replace
kzalloc with devm_kzalloc to avoid a memory leak and add a check
for this allocation.

Reported-by: eriri <1527030098@qq.com>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=217081

Signed-off-by: Kang Chen <void0red@gmail.com>
---
v2 -> v1: replace kzalloc with devm_kzalloc

 drivers/usb/gadget/udc/mv_udc_core.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

Comments

Greg Kroah-Hartman Feb. 24, 2023, 4:33 p.m. UTC | #1 
On Fri, Feb 24, 2023 at 10:31:48PM +0800, void0red wrote:
> From: Kang Chen <void0red@gmail.com>
> 
> This driver uses the unified memory management api, so replace
> kzalloc with devm_kzalloc to avoid a memory leak and add a check
> for this allocation.
> 
> Reported-by: eriri <1527030098@qq.com>
> Link: https://bugzilla.kernel.org/show_bug.cgi?id=217081
> 
> Signed-off-by: Kang Chen <void0red@gmail.com>
> ---
> v2 -> v1: replace kzalloc with devm_kzalloc

I see 2 v2 patches on the mailing list, how am I supposed to know which
one is correct?

Please fix up and resend a v3.

thanks,

greg k-h
diff mbox series

Patch

diff --git a/drivers/usb/gadget/udc/mv_udc_core.c b/drivers/usb/gadget/udc/mv_udc_core.c
index b397f3a84..08474c08d 100644
--- a/drivers/usb/gadget/udc/mv_udc_core.c
+++ b/drivers/usb/gadget/udc/mv_udc_core.c
@@ -2229,7 +2229,11 @@  static int mv_udc_probe(struct platform_device *pdev)
 	INIT_LIST_HEAD(&udc->status_req->queue);
 
 	/* allocate a small amount of memory to get valid address */
-	udc->status_req->req.buf = kzalloc(8, GFP_KERNEL);
+	udc->status_req->req.buf = devm_kzalloc(&pdev->dev, 8, GFP_KERNEL);
+	if (!udc->status_req->req.buf) {
+		retval = -ENOMEM;
+		goto err_destroy_dma;
+	}
 	udc->status_req->req.dma = DMA_ADDR_INVALID;
 
 	udc->resume_state = USB_STATE_NOTATTACHED;