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authorLinus Torvalds <torvalds@linux-foundation.org>2016-04-14 18:40:47 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-04-14 18:40:47 -0700
commita7109a2ca79ce868620db3fff884277084a9d646 (patch)
treebcd5e80449ecd37ac4742b98cb9b41277f1c7825 /drivers/mailbox
parentdfe70581c1b7a7625baa6ba26f8876d337845a23 (diff)
parent0c44d7896cbf9156b8bb10da4f665005622235ae (diff)
Merge branch 'mailbox-devel' of git://git.linaro.org/landing-teams/working/fujitsu/integration
Pull mailbox fixes from Jussi Brar: "Misc fixes: mailbox-test driver: - prevent memory leak and another cosmetic change mailbox: - change the returned error code Xgene driver: - return -ENOMEM instead of PTR_ERR for failed devm_kzalloc" * 'mailbox-devel' of git://git.linaro.org/landing-teams/working/fujitsu/integration: mailbox: Stop using ENOSYS for anything other than unimplemented syscalls mailbox: mailbox-test: Prevent memory leak mailbox: mailbox-test: Use more consistent format for calling copy_from_user() mailbox: xgene-slimpro: Fix wrong test for devm_kzalloc
Diffstat (limited to 'drivers/mailbox')
-rw-r--r--drivers/mailbox/mailbox-test.c16
-rw-r--r--drivers/mailbox/mailbox-xgene-slimpro.c4
-rw-r--r--drivers/mailbox/mailbox.c4
3 files changed, 13 insertions, 11 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 = {
diff --git a/drivers/mailbox/mailbox-xgene-slimpro.c b/drivers/mailbox/mailbox-xgene-slimpro.c
index bd07f39f0692..dd2afbca51c9 100644
--- a/drivers/mailbox/mailbox-xgene-slimpro.c
+++ b/drivers/mailbox/mailbox-xgene-slimpro.c
@@ -189,8 +189,8 @@ static int slimpro_mbox_probe(struct platform_device *pdev)
int i;
ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL);
- if (IS_ERR(ctx))
- return PTR_ERR(ctx);
+ if (!ctx)
+ return -ENOMEM;
platform_set_drvdata(pdev, ctx);
diff --git a/drivers/mailbox/mailbox.c b/drivers/mailbox/mailbox.c
index 6a4811f85705..4a36632c236f 100644
--- a/drivers/mailbox/mailbox.c
+++ b/drivers/mailbox/mailbox.c
@@ -375,13 +375,13 @@ struct mbox_chan *mbox_request_channel_byname(struct mbox_client *cl,
if (!np) {
dev_err(cl->dev, "%s() currently only supports DT\n", __func__);
- return ERR_PTR(-ENOSYS);
+ return ERR_PTR(-EINVAL);
}
if (!of_get_property(np, "mbox-names", NULL)) {
dev_err(cl->dev,
"%s() requires an \"mbox-names\" property\n", __func__);
- return ERR_PTR(-ENOSYS);
+ return ERR_PTR(-EINVAL);
}
of_property_for_each_string(np, "mbox-names", prop, mbox_name) {