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path: root/drivers/s390/block/xpram.c
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Diffstat (limited to 'drivers/s390/block/xpram.c')
-rw-r--r--drivers/s390/block/xpram.c65
1 files changed, 0 insertions, 65 deletions
diff --git a/drivers/s390/block/xpram.c b/drivers/s390/block/xpram.c
index db442cd6621e..ee604e92a5fa 100644
--- a/drivers/s390/block/xpram.c
+++ b/drivers/s390/block/xpram.c
@@ -42,7 +42,6 @@
#include <linux/suspend.h>
#include <linux/platform_device.h>
#include <asm/uaccess.h>
-#include <asm/checksum.h>
#define XPRAM_NAME "xpram"
#define XPRAM_DEVS 1 /* one partition */
@@ -51,7 +50,6 @@
typedef struct {
unsigned int size; /* size of xpram segment in pages */
unsigned int offset; /* start page of xpram segment */
- unsigned int csum; /* partition checksum for suspend */
} xpram_device_t;
static xpram_device_t xpram_devices[XPRAM_MAX_DEVS];
@@ -387,58 +385,6 @@ out:
}
/*
- * Save checksums for all partitions.
- */
-static int xpram_save_checksums(void)
-{
- unsigned long mem_page;
- int rc, i;
-
- rc = 0;
- mem_page = (unsigned long) __get_free_page(GFP_KERNEL);
- if (!mem_page)
- return -ENOMEM;
- for (i = 0; i < xpram_devs; i++) {
- rc = xpram_page_in(mem_page, xpram_devices[i].offset);
- if (rc)
- goto fail;
- xpram_devices[i].csum = csum_partial((const void *) mem_page,
- PAGE_SIZE, 0);
- }
-fail:
- free_page(mem_page);
- return rc ? -ENXIO : 0;
-}
-
-/*
- * Verify checksums for all partitions.
- */
-static int xpram_validate_checksums(void)
-{
- unsigned long mem_page;
- unsigned int csum;
- int rc, i;
-
- rc = 0;
- mem_page = (unsigned long) __get_free_page(GFP_KERNEL);
- if (!mem_page)
- return -ENOMEM;
- for (i = 0; i < xpram_devs; i++) {
- rc = xpram_page_in(mem_page, xpram_devices[i].offset);
- if (rc)
- goto fail;
- csum = csum_partial((const void *) mem_page, PAGE_SIZE, 0);
- if (xpram_devices[i].csum != csum) {
- rc = -EINVAL;
- goto fail;
- }
- }
-fail:
- free_page(mem_page);
- return rc ? -ENXIO : 0;
-}
-
-/*
* Resume failed: Print error message and call panic.
*/
static void xpram_resume_error(const char *message)
@@ -458,21 +404,10 @@ static int xpram_restore(struct device *dev)
xpram_resume_error("xpram disappeared");
if (xpram_pages != xpram_highest_page_index() + 1)
xpram_resume_error("Size of xpram changed");
- if (xpram_validate_checksums())
- xpram_resume_error("Data of xpram changed");
return 0;
}
-/*
- * Save necessary state in suspend.
- */
-static int xpram_freeze(struct device *dev)
-{
- return xpram_save_checksums();
-}
-
static struct dev_pm_ops xpram_pm_ops = {
- .freeze = xpram_freeze,
.restore = xpram_restore,
};