From d6b0c53723753fc0cfda63f56735b225c43e1e9a Mon Sep 17 00:00:00 2001
From: James Bottomley <James.Bottomley@steeleye.com>
Date: Sun, 2 Jul 2006 10:06:28 -0500
Subject: [PATCH] [SCSI] fix error handling in scsi_io_completion
There was a logic fault in scsi_io_completion() where zero transfer
commands that complete successfully were sent to the block layer as
not up to date. This patch removes the if (good_bytes > 0) gate
around the successful completion, since zero transfer commands do have
good_bytes == 0.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
---
drivers/scsi/scsi_lib.c | 30 ++++++++++++++----------------
1 file changed, 14 insertions(+), 16 deletions(-)
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index bf5191f6aaa15..08af9aae7df38 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -920,22 +920,20 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
* Next deal with any sectors which we were able to correctly
* handle.
*/
- if (good_bytes > 0) {
- SCSI_LOG_HLCOMPLETE(1, printk("%ld sectors total, "
- "%d bytes done.\n",
- req->nr_sectors, good_bytes));
- SCSI_LOG_HLCOMPLETE(1, printk("use_sg is %d\n", cmd->use_sg));
-
- if (clear_errors)
- req->errors = 0;
-
- /* A number of bytes were successfully read. If there
- * is leftovers and there is some kind of error
- * (result != 0), retry the rest.
- */
- if (scsi_end_request(cmd, 1, good_bytes, !!result) == NULL)
- return;
- }
+ SCSI_LOG_HLCOMPLETE(1, printk("%ld sectors total, "
+ "%d bytes done.\n",
+ req->nr_sectors, good_bytes));
+ SCSI_LOG_HLCOMPLETE(1, printk("use_sg is %d\n", cmd->use_sg));
+
+ if (clear_errors)
+ req->errors = 0;
+
+ /* A number of bytes were successfully read. If there
+ * are leftovers and there is some kind of error
+ * (result != 0), retry the rest.
+ */
+ if (scsi_end_request(cmd, 1, good_bytes, result == 0) == NULL)
+ return;
/* good_bytes = 0, or (inclusive) there were leftovers and
* result = 0, so scsi_end_request couldn't retry.
--
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