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CIFS: return correct errors when pinning memory failed for direct I/O 

When pinning memory failed, we should return the correct error code and
rewind the SMB credits.

Reported-by: Murphy Zhou <jencce.kernel@gmail.com>
Signed-off-by: Long Li <longli@microsoft.com>
Cc: stable@vger.kernel.org
Cc: Murphy Zhou <jencce.kernel@gmail.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Long Li 2018-12-16 22:41:07 +00:00 committed by Steve French
parent b6bc8a7b99
commit 54e94ff94e
1 changed files with 7 additions and 1 deletions
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8
fs/cifs/file.c
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@ -2632,6 +2632,9 @@ cifs_write_from_iter(loff_t offset, size_t len, struct iov_iter *from,
result, from->type,
from->iov_offset, from->count);
dump_stack();
rc = result;
add_credits_and_wake_if(server, credits, 0);
break;
}
cur_len = (size_t)result;
@ -3315,13 +3318,16 @@ cifs_send_async_read(loff_t offset, size_t len, struct cifsFileInfo *open_file,
cur_len, &start);
if (result < 0) {
cifs_dbg(VFS,
"couldn't get user pages (cur_len=%zd)"
"couldn't get user pages (rc=%zd)"
" iter type %d"
" iov_offset %zd count %zd\n",
result, direct_iov.type,
direct_iov.iov_offset,
direct_iov.count);
dump_stack();
rc = result;
add_credits_and_wake_if(server, credits, 0);
break;
}
cur_len = (size_t)result;