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authorMatthew Wilcox <matthew@wil.cx>2007-09-25 20:42:04 +0400
committerJames Bottomley <jejb@mulgrave.localdomain>2007-10-12 22:52:46 +0400
commit6f5391c283d7fdcf24bf40786ea79061919d1e1d (patch)
tree32ee9abddf9879445792019e1c03bcd28ce6bd4f /drivers/scsi/scsi.c
parent687d2bc4877081a44c41b5b312e012cc69edda53 (diff)
downloadlinux-6f5391c283d7fdcf24bf40786ea79061919d1e1d.tar.xz
[SCSI] Get rid of scsi_cmnd->done
The ULD ->done callback moves into the scsi_driver. By moving the call to scsi_io_completion() from scsi_blk_pc_done() to scsi_finish_command(), we can eliminate the latter entirely. By returning 'good_bytes' from the ->done callback (rather than invoking scsi_io_completion()), we can stop exporting scsi_io_completion(). Also move the prototypes from sd.h to sd.c as they're all internal anyway. Rename sd_rw_intr to sd_done and rw_intr to sr_done. Inspired-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/scsi.c')
-rw-r--r--drivers/scsi/scsi.c20
1 files changed, 17 insertions, 3 deletions
diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c
index 07a7c2a70a3f..192948822455 100644
--- a/drivers/scsi/scsi.c
+++ b/drivers/scsi/scsi.c
@@ -59,6 +59,7 @@
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_dbg.h>
#include <scsi/scsi_device.h>
+#include <scsi/scsi_driver.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
@@ -367,9 +368,8 @@ void scsi_log_send(struct scsi_cmnd *cmd)
scsi_print_command(cmd);
if (level > 3) {
printk(KERN_INFO "buffer = 0x%p, bufflen = %d,"
- " done = 0x%p, queuecommand 0x%p\n",
+ " queuecommand 0x%p\n",
scsi_sglist(cmd), scsi_bufflen(cmd),
- cmd->done,
cmd->device->host->hostt->queuecommand);
}
@@ -654,6 +654,12 @@ void __scsi_done(struct scsi_cmnd *cmd)
blk_complete_request(rq);
}
+/* Move this to a header if it becomes more generally useful */
+static struct scsi_driver *scsi_cmd_to_driver(struct scsi_cmnd *cmd)
+{
+ return *(struct scsi_driver **)cmd->request->rq_disk->private_data;
+}
+
/*
* Function: scsi_finish_command
*
@@ -665,6 +671,8 @@ void scsi_finish_command(struct scsi_cmnd *cmd)
{
struct scsi_device *sdev = cmd->device;
struct Scsi_Host *shost = sdev->host;
+ struct scsi_driver *drv;
+ unsigned int good_bytes;
scsi_device_unbusy(sdev);
@@ -690,7 +698,13 @@ void scsi_finish_command(struct scsi_cmnd *cmd)
"Notifying upper driver of completion "
"(result %x)\n", cmd->result));
- cmd->done(cmd);
+ good_bytes = cmd->request_bufflen;
+ if (cmd->request->cmd_type != REQ_TYPE_BLOCK_PC) {
+ drv = scsi_cmd_to_driver(cmd);
+ if (drv->done)
+ good_bytes = drv->done(cmd);
+ }
+ scsi_io_completion(cmd, good_bytes);
}
EXPORT_SYMBOL(scsi_finish_command);