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s390/crash: make copy_oldmem_page() return number of bytes copied 

Callback copy_oldmem_page() returns either error code or zero.
Instead, it should return the error code or number of bytes copied.

Fixes: df9694c797 ("s390/dump: streamline oldmem copy functions")
Reviewed-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Tested-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
This commit is contained in:
Alexander Gordeev 2022-06-09 21:32:39 +02:00
parent cc02e6e21a
commit af2debd58b
1 changed files with 4 additions and 3 deletions
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7
arch/s390/kernel/crash_dump.c
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@ -233,9 +233,10 @@ ssize_t copy_oldmem_page(struct iov_iter *iter, unsigned long pfn, size_t csize,
rc = copy_oldmem_user(iter->iov->iov_base, src, csize);
else
rc = copy_oldmem_kernel(iter->kvec->iov_base, src, csize);
if (!rc)
iov_iter_advance(iter, csize);
return rc;
if (rc < 0)
return rc;
iov_iter_advance(iter, csize);
return csize;
}
/*