drivers/mmc: Move dereference after NULL test

If the NULL test on mrq is needed, then the derefernce should be after the
NULL test.

A simplified version of the semantic match that detects this problem is as
follows (http://coccinelle.lip6.fr/):

// <smpl>
@match exists@
expression x, E;
identifier fld;
@@

* x->fld
  ... when != \(x = E\|&x\)
* x == NULL
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/mmc/host/s3cmci.c b/drivers/mmc/host/s3cmci.c
index ec15f1bbf8b9..b4db401874e0 100644
--- a/drivers/mmc/host/s3cmci.c
+++ b/drivers/mmc/host/s3cmci.c
@@ -820,7 +820,7 @@ fail_request:
 static void finalize_request(struct s3cmci_host *host)
 {
         struct mmc_request *mrq = host->mrq;
-        struct mmc_command *cmd = host->cmd_is_stop ? mrq->stop : mrq->cmd;
+        struct mmc_command *cmd;
         int debug_as_failure = 0;
 
         if (host->complete_what != COMPLETION_FINALIZE)
@@ -828,6 +828,7 @@ static void finalize_request(struct s3cmci_host *host)
 
         if (!mrq)
                 return;
+        cmd = host->cmd_is_stop ? mrq->stop : mrq->cmd;
 
         if (cmd->data && (cmd->error == 0) &&
             (cmd->data->error == 0)) {