diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-05-09 13:20:04 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-05-09 13:20:04 +0200 |
| commit | 4096e645d85d575e7b6e699f470f5519c34fda5d (patch) | |
| tree | 9cfb8e2c1a816e2f7142d20b79c578fdf69dd2f2 /drivers/mailbox/mailbox-test.c | |
| parent | a0ca97b808c06793fd9dfb69243ce945c9fff501 (diff) | |
| parent | 44549e8f5eea4e0a41b487b63e616cb089922b99 (diff) | |
Merge 4.6-rc7 into staging-next
This fixes some merge issues with some iio drivers that were found in
linux-next.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/mailbox/mailbox-test.c')
| -rw-r--r-- | drivers/mailbox/mailbox-test.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/drivers/mailbox/mailbox-test.c b/drivers/mailbox/mailbox-test.c index dc11bbf27274..58d04726cdd7 100644 --- a/drivers/mailbox/mailbox-test.c +++ b/drivers/mailbox/mailbox-test.c @@ -46,7 +46,6 @@ static ssize_t mbox_test_signal_write(struct file *filp, size_t count, loff_t *ppos) { struct mbox_test_device *tdev = filp->private_data; - int ret; if (!tdev->tx_channel) { dev_err(tdev->dev, "Channel cannot do Tx\n"); @@ -60,17 +59,20 @@ 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; + } - ret = copy_from_user(tdev->signal, userbuf, count); - if (ret) { + if (copy_from_user(tdev->signal, userbuf, count)) { kfree(tdev->signal); + tdev->signal = NULL; return -EFAULT; } - return ret < 0 ? ret : count; + return count; } static const struct file_operations mbox_test_signal_ops = { |