Commit 755e4ca4 authored by Bryan O'Sullivan's avatar Bryan O'Sullivan Committed by Roland Dreier
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IB/ipath: fix race with exposing reset file

We were accidentally exposing the "reset" sysfs file more than once
per device.
Signed-off-by: default avatarBryan O'Sullivan <>
Signed-off-by: default avatarRoland Dreier <>
parent 254abfd3
......@@ -277,13 +277,14 @@ static int ipath_diag_open(struct inode *in, struct file *fp)
spin_unlock_irqrestore(&ipath_devs_lock, flags);
/* Only expose a way to reset the device if we
make it into diag mode. */
if (ret == 0)
return ret;
......@@ -711,10 +711,22 @@ static struct attribute_group dev_attr_group = {
* enters diag mode. A device reset is quite likely to crash the
* machine entirely, so we don't want to normally make it
* available.
* Called with ipath_mutex held.
int ipath_expose_reset(struct device *dev)
return device_create_file(dev, &dev_attr_reset);
static int exposed;
int ret;
if (!exposed) {
ret = device_create_file(dev, &dev_attr_reset);
exposed = 1;
ret = 0;
return ret;
int ipath_driver_create_group(struct device_driver *drv)
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