diff mbox series

[v3] USB: host: Check for null res pointer

Message ID 20211220134244.930727-1-jiasheng@iscas.ac.cn (mailing list archive)
State Superseded
Headers show
Series [v3] USB: host: Check for null res pointer | expand

Commit Message

Jiasheng Jiang Dec. 20, 2021, 1:42 p.m. UTC
The return value of platform_get_resource() needs to be checked.
To avoid use of error pointer in case that there is no suitable resource.

Fixes: 4808a1c02611 ("[PATCH] USB: Add isp116x-hcd USB host controller driver")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
---
Changelog:

v2 -> v3

*Change 1. Correct the commit message.
*CHange 2. Change the return code.
---
 drivers/usb/host/isp116x-hcd.c | 6 ++++++
 1 file changed, 6 insertions(+)

Comments

Sergey Shtylyov Dec. 20, 2021, 4:48 p.m. UTC | #1
On 12/20/21 4:42 PM, Jiasheng Jiang wrote:

> The return value of platform_get_resource() needs to be checked.
> To avoid use of error pointer in case that there is no suitable resource.

   s/error/NULL/ -- platform_get_resource() doesn't return error pointers...

> Fixes: 4808a1c02611 ("[PATCH] USB: Add isp116x-hcd USB host controller driver")
> Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
[...]

MBR, Sergey
Sergey Shtylyov Dec. 20, 2021, 4:50 p.m. UTC | #2
And the subject should look like "usb: host: isp116x: check for NULL pointer".
diff mbox series

Patch

diff --git a/drivers/usb/host/isp116x-hcd.c b/drivers/usb/host/isp116x-hcd.c
index 8835f6bd528e..addd2b43a14c 100644
--- a/drivers/usb/host/isp116x-hcd.c
+++ b/drivers/usb/host/isp116x-hcd.c
@@ -1541,9 +1541,15 @@  static int isp116x_remove(struct platform_device *pdev)
 
 	iounmap(isp116x->data_reg);
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	if (!res)
+		return -ENODEV;
+
 	release_mem_region(res->start, 2);
 	iounmap(isp116x->addr_reg);
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -ENODEV;
+
 	release_mem_region(res->start, 2);
 
 	usb_put_hcd(hcd);