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

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[ Upstream commit 3c347cdafa ]

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: 9ba26f5cec ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yang Yingliang
2022-11-25 14:41:20 +08:00
committed by Greg Kroah-Hartman
parent b3862858b6
commit 6fe1adeabc
1 changed files with 5 additions and 1 deletions
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6
drivers/usb/core/hcd.c
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@@ -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.