[patch] [SCSI] be2iscsi: cleanup a min_t() call

Dan Carpenter
2011-09-26T08:29:22Z

"sense_len" was declared as int type but actually it only stores a
u16 value that comes from hardware. The cast to u16 in min_t()
confuses static analysis because it truncates the int to u16 so I've
fixed the declaration to reflect that "sense_len" is just a u16.

Also there was a call to cpu_to_be16() which I've changed to
be16_to_cpu(). The functions are equivalent, but obviously the
hardware is big endian and we're doing the min_t() comparison on CPU
endian values.

This whole patch is just a cleanup and doesn't affect how the code
works.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
Compile tested only. Sorry.

diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c
index 57fea38..344af8d 100644
--- a/drivers/scsi/be2iscsi/be_main.c
+++ b/drivers/scsi/be2iscsi/be_main.c
@@ -1104,7 +1104,6 @@ be_complete_io(struct beiscsi_conn *beiscsi_conn,
struct be_status_bhs *sts_bhs =
(struct be_status_bhs *)io_task->cmd_bhs;
struct iscsi_conn *conn = beiscsi_conn->conn;
- unsigned int sense_len;
unsigned char *sense;
u32 resid = 0, exp_cmdsn, max_cmdsn;
u8 rsp, status, flags;
@@ -1147,9 +1146,11 @@ be_complete_io(struct beiscsi_conn *beiscsi_conn,
}

if (status == SAM_STAT_CHECK_CONDITION) {
+ u16 sense_len;
unsigned short *slen = (unsigned short *)sts_bhs->sense_info;
+
sense = sts_bhs->sense_info + sizeof(unsigned short);
- sense_len = cpu_to_be16(*slen);
+ sense_len = be16_to_cpu(*slen);
memcpy(task->sc->sense_buffer, sense,
min_t(u16, sense_len, SCSI_SENSE_BUFFERSIZE));
}