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-rw-r--r--drivers/mailbox/mailbox-test.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/mailbox/mailbox-test.c b/drivers/mailbox/mailbox-test.c
index 5f4b439fd45a..58d04726cdd7 100644
--- a/drivers/mailbox/mailbox-test.c
+++ b/drivers/mailbox/mailbox-test.c
@@ -59,9 +59,12 @@ static ssize_t mbox_test_signal_write(struct file *filp,
return -EINVAL;
}
- tdev->signal = kzalloc(MBOX_MAX_SIG_LEN, GFP_KERNEL);
- if (!tdev->signal)
- return -ENOMEM;
+ /* Only allocate memory if we need to */
+ if (!tdev->signal) {
+ tdev->signal = kzalloc(MBOX_MAX_SIG_LEN, GFP_KERNEL);
+ if (!tdev->signal)
+ return -ENOMEM;
+ }
if (copy_from_user(tdev->signal, userbuf, count)) {
kfree(tdev->signal);

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