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s390/pci: cleanup clp page allocation

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Use the __get_free_pages wrapper in clp_alloc_block. Also change the
allocation to use one page only. This page is used as CLP response
block e.g. to list available pci functions. Using one page we can
list > 250 pci functions at once and we have code to loop around this
CLP command (if not all functions fit into to the CLP block) already
in place.

Acked-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2013-01-31 19:54:03 +01:00 committed by Martin Schwidefsky
parent bf4ec24ff8
commit add09d61fe
2 changed files with 2 additions and 3 deletions
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2
arch/s390/include/asm/clp.h
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@ -2,7 +2,7 @@
#define _ASM_S390_CLP_H
/* CLP common request & response block size */
#define CLP_BLK_SIZE (PAGE_SIZE * 2)
#define CLP_BLK_SIZE PAGE_SIZE
struct clp_req_hdr {
u16 len;

3
arch/s390/pci/pci_clp.c
View File

@ -37,8 +37,7 @@ static inline u8 clp_instr(void *data)
static void *clp_alloc_block(void)
{
struct page *page = alloc_pages(GFP_KERNEL, get_order(CLP_BLK_SIZE));
return (page) ? page_address(page) : NULL;
return (void *) __get_free_pages(GFP_KERNEL, get_order(CLP_BLK_SIZE));
}
static void clp_free_block(void *ptr)