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drivers/mmc: Move dereference after NULL test

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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>
This commit is contained in:
Julia Lawall 2009-12-14 18:01:20 -08:00 committed by Linus Torvalds
parent 4ec6496065
commit 3423d80af6
1 changed files with 2 additions and 1 deletions
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3
drivers/mmc/host/s3cmci.c
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@ -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)) {