UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

ide-cd: clear sense buffer before issuing request sense 

Impact: code simplification

ide_cd_request_sense_fixup() clears the tail of the sense buffer if
the device didn't completely fill it.  This patch makes
cdrom_queue_request_sense() clear the sense buffer before issuing the
command instead of clearing it afterwards.  This simplifies code and
eases future changes.

Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Tejun Heo 2009-04-19 07:00:41 +09:00
parent 46a802e852
commit 1873b90cde
1 changed files with 4 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/ide/ide-cd.c
View File

@ -217,6 +217,8 @@ static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
if (sense == NULL)
sense = &info->sense_data;
memset(sense, 0, 18);
/* stuff the sense request in front of our current request */
blk_rq_init(NULL, rq);
rq->cmd_type = REQ_TYPE_ATA_PC;
@ -504,14 +506,8 @@ static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
* and some drives don't send them. Sigh.
*/
if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
cmd->nleft > 0 && cmd->nleft <= 5) {
unsigned int ofs = cmd->nbytes - cmd->nleft;
while (cmd->nleft > 0) {
*((u8 *)rq->data + ofs++) = 0;
cmd->nleft--;
}
}
cmd->nleft > 0 && cmd->nleft <= 5)
cmd->nleft = 0;
}
int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,