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Commit a0e997c2 authored by Geert Uytterhoeven's avatar Geert Uytterhoeven
Browse files

sparc: iounmap() and *_free_coherent() - Use lookup_resource() 



Replace a custom implementation (which doesn't lock the resource tree) by a
call to lookup_resource()

Signed-off-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
Acked-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 217bbd81

arch/sparc/kernel/ioport.c

+7 −25
Original line number Diff line number Diff line
@@ -65,9 +65,6 @@ static inline void dma_make_coherent(unsigned long pa, unsigned long len) 
}

#endif



static struct resource *_sparc_find_resource(struct resource *r,

					     unsigned long);



static void __iomem *_sparc_ioremap(struct resource *res, u32 bus, u32 pa, int sz);

static void __iomem *_sparc_alloc_io(unsigned int busno, unsigned long phys,

    unsigned long size, char *name);
@@ -143,7 +140,11 @@ void iounmap(volatile void __iomem *virtual) 
	unsigned long vaddr = (unsigned long) virtual & PAGE_MASK;

	struct resource *res;



	if ((res = _sparc_find_resource(&sparc_iomap, vaddr)) == NULL) {

	/*

	 * XXX Too slow. Can have 8192 DVMA pages on sun4m in the worst case.

	 * This probably warrants some sort of hashing.

	*/

	if ((res = lookup_resource(&sparc_iomap, vaddr)) == NULL) {

		printk("free_io/iounmap: cannot free %lx\n", vaddr);

		return;

	}
@@ -319,7 +320,7 @@ static void sbus_free_coherent(struct device *dev, size_t n, void *p, 
	struct resource *res;

	struct page *pgv;



	if ((res = _sparc_find_resource(&_sparc_dvma,

	if ((res = lookup_resource(&_sparc_dvma,

	    (unsigned long)p)) == NULL) {

		printk("sbus_free_consistent: cannot free %p\n", p);

		return;
@@ -492,7 +493,7 @@ static void pci32_free_coherent(struct device *dev, size_t n, void *p, 
{

	struct resource *res;



	if ((res = _sparc_find_resource(&_sparc_dvma,

	if ((res = lookup_resource(&_sparc_dvma,

	    (unsigned long)p)) == NULL) {

		printk("pci_free_consistent: cannot free %p\n", p);

		return;
@@ -715,25 +716,6 @@ static const struct file_operations sparc_io_proc_fops = { 
};

#endif /* CONFIG_PROC_FS */



/*

 * This is a version of find_resource and it belongs to kernel/resource.c.

 * Until we have agreement with Linus and Martin, it lingers here.

 *

 * XXX Too slow. Can have 8192 DVMA pages on sun4m in the worst case.

 * This probably warrants some sort of hashing.

 */

static struct resource *_sparc_find_resource(struct resource *root,

					     unsigned long start)

{

	struct resource *tmp;



	for (tmp = root->child; tmp != 0; tmp = tmp->sibling) {

		if (tmp->start == start)

			return tmp;

	}

	return NULL;

}



static void register_proc_sparc_ioport(void)

{

#ifdef CONFIG_PROC_FS