usb: core: hcd: Fix return value check in usb_hcd_setup_local_mem()

If dmam_alloc_attrs() fails, it returns NULL pointer and never
return ERR_PTR(), so repleace IS_ERR() with IS_ERR_OR_NULL()
and if it's NULL, returns -ENOMEM.

Fixes: 9ba26f5cecd8 ("ARM: sa1100/assabet: move dmabounce hack to ohci driver")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20221125064120.2842452-1-yangyingliang@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index faeaace0d197dbb88739cebf8bd06617a5712171..8300baedafd20e2d188ae0f7e537c14118b677d7 100644 (file)
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -3133,8 +3133,12 @@ int usb_hcd_setup_local_mem(struct usb_hcd *hcd, phys_addr_t phys_addr,
                                             GFP_KERNEL,
                                             DMA_ATTR_WRITE_COMBINE);
 
-       if (IS_ERR(local_mem))
+       if (IS_ERR_OR_NULL(local_mem)) {
+               if (!local_mem)
+                       return -ENOMEM;
+
                return PTR_ERR(local_mem);
+       }
 
        /*
         * Here we pass a dma_addr_t but the arg type is a phys_addr_t.