Commit 94b9a70d authored Jun 07, 2019 by Dan Carpenter Committed by Greg Kroah-Hartman Jul 25, 2019

usb/hcd: Fix a NULL vs IS_ERR() bug in usb_hcd_setup_local_mem()



The devm_memremap() function doesn't return NULL, it returns error
pointers.

Fixes: b0310c2f ("USB: use genalloc for USB HCs with local memory")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://lore.kernel.org/r/20190607135709.GC16718@mwanda


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent d74ffae8

drivers/usb/core/hcd.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -3052,8 +3052,8 @@ int usb_hcd_setup_local_mem(struct usb_hcd *hcd, phys_addr_t phys_addr,

		local_mem = devm_memremap(hcd->self.sysdev, phys_addr,
		size, MEMREMAP_WC);
		if (!local_mem)
		return -ENOMEM;
		if (IS_ERR(local_mem))
		return PTR_ERR(local_mem);

		/*
		* Here we pass a dma_addr_t but the arg type is a phys_addr_t.