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[POWERPC] mpc5200: Fix null dereference if bestcomm fails to initialize

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If the bestcomm initialization fails, calls to the task allocate
function should fail gracefully instead of oopsing with a NULL deref.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Grant Likely 2008-03-22 14:41:05 +11:00 committed by Paul Mackerras
parent b8c19eb16a
commit 9560aea4e9
1 changed files with 4 additions and 0 deletions
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4
arch/powerpc/sysdev/bestcomm/bestcomm.c
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@ -52,6 +52,10 @@ bcom_task_alloc(int bd_count, int bd_size, int priv_size)
int i, tasknum = -1;
struct bcom_task *tsk;
/* Don't try to do anything if bestcomm init failed */
if (!bcom_eng)
return NULL;
/* Get and reserve a task num */
spin_lock(&bcom_eng->lock);