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-rw-r--r--fs/cifs/file.c22
1 files changed, 15 insertions, 7 deletions
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 77c990f0cb9..675bd256829 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1190,7 +1190,6 @@ retry:
/* BB what if continued retry is
requested via mount flags? */
set_bit(AS_EIO, &mapping->flags);
- SetPageError(page);
} else {
cifs_stats_bytes_written(cifs_sb->tcon,
bytes_written);
@@ -1198,6 +1197,13 @@ retry:
}
for (i = 0; i < n_iov; i++) {
page = pvec.pages[first + i];
+ /* Should we also set page error on
+ success rc but too little data written? */
+ /* BB investigate retry logic on temporary
+ server crash cases and how recovery works
+ when page marked as error */
+ if(rc)
+ SetPageError(page);
kunmap(page);
unlock_page(page);
page_cache_release(page);
@@ -1436,13 +1442,15 @@ ssize_t cifs_user_read(struct file *file, char __user *read_data,
&bytes_read, &smb_read_data,
&buf_type);
pSMBr = (struct smb_com_read_rsp *)smb_read_data;
- if (copy_to_user(current_offset,
- smb_read_data + 4 /* RFC1001 hdr */
- + le16_to_cpu(pSMBr->DataOffset),
- bytes_read)) {
- rc = -EFAULT;
- }
if (smb_read_data) {
+ if (copy_to_user(current_offset,
+ smb_read_data +
+ 4 /* RFC1001 length field */ +
+ le16_to_cpu(pSMBr->DataOffset),
+ bytes_read)) {
+ rc = -EFAULT;
+ }
+
if(buf_type == CIFS_SMALL_BUFFER)
cifs_small_buf_release(smb_read_data);
else if(buf_type == CIFS_LARGE_BUFFER)