diff options
| -rw-r--r-- | drivers/s390/block/xpram.c | 65 |
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, }; |