mirrors/scst
1
0
Fork 0
mirror of https://github.com/SCST-project/scst.git synced 2026-05-18 11:11:27 +00:00
Code Issues Packages Projects Releases Wiki Activity

Change write residual underflow handling

Browse Source 
Now it writes only supplied amount of data.

Reported by Klaus Hochlehnert <Mailings@kh-dev.de>



git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@5014 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Vladislav Bolkhovitin
2013-10-02 04:53:12 +00:00
parent c296055104
commit 69643b4b5d
1 changed files with 10 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
scst/src/scst_targ.c
View File

@@ -1588,19 +1588,23 @@ static int scst_tgt_pre_exec(struct scst_cmd *cmd)
if (unlikely(cmd->resid_possible)) {
if (cmd->data_direction & SCST_DATA_WRITE) {
bool do_zero = false;
bool remainder = false;
if (cmd->data_direction & SCST_DATA_READ) {
if (cmd->write_len != cmd->out_bufflen)
do_zero = true;
remainder = true;
} else {
if (cmd->write_len != cmd->bufflen)
do_zero = true;
remainder = true;
}
if (do_zero) {
if (remainder) {
if (!(cmd->op_flags & SCST_TRANSFER_LEN_TYPE_FIXED) ||
(cmd->write_len & ((1 << cmd->dev->block_shift) - 1)) == 0) {
#if 0 /* dangerous, because can override valid data by zeros */
scst_check_restore_sg_buff(cmd);
scst_zero_write_rest(cmd);
#else
/* do nothing */
#endif
} else {
/*
* Looks like it's safer in this case to
@@ -3109,6 +3113,8 @@ static int scst_check_sense(struct scst_cmd *cmd)
cmd->sense = NULL;
scst_check_restore_sg_buff(cmd);
if (cmd->data_direction & SCST_DATA_WRITE)
scst_set_write_len(cmd);
sBUG_ON(cmd->dbl_ua_orig_resp_data_len < 0);
cmd->data_direction =