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crypto: nx - move kzalloc() out of spinlock 

Move the kzalloc() calls in nx842_probe() and nx842_OF_upd() to the top
of the functions, before taking the devdata spinlock.

Since kzalloc() without GFP_ATOMIC can sleep, it can't be called while
holding a spinlock.  Move the calls to before taking the lock.

Signed-off-by: Dan Streetman <ddstreet@ieee.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Dan Streetman 2015-07-22 14:26:33 -04:00 committed by Herbert Xu
parent 90fd73f912
commit 7f6e3aad5a
1 changed files with 16 additions and 22 deletions
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38
drivers/crypto/nx/nx-842-pseries.c
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@ -724,6 +724,10 @@ static int nx842_OF_upd(struct property *new_prop)
int ret = 0;
unsigned long flags;
new_devdata = kzalloc(sizeof(*new_devdata), GFP_NOFS);
if (!new_devdata)
return -ENOMEM;
spin_lock_irqsave(&devdata_mutex, flags);
old_devdata = rcu_dereference_check(devdata,
lockdep_is_held(&devdata_mutex));
@ -733,16 +737,10 @@ static int nx842_OF_upd(struct property *new_prop)
if (!old_devdata || !of_node) {
pr_err("%s: device is not available\n", __func__);
spin_unlock_irqrestore(&devdata_mutex, flags);
kfree(new_devdata);
return -ENODEV;
}
new_devdata = kzalloc(sizeof(*new_devdata), GFP_NOFS);
if (!new_devdata) {
dev_err(old_devdata->dev, "%s: Could not allocate memory for device data\n", __func__);
ret = -ENOMEM;
goto error_out;
}
memcpy(new_devdata, old_devdata, sizeof(*old_devdata));
new_devdata->counters = old_devdata->counters;
@ -966,6 +964,17 @@ static int nx842_probe(struct vio_dev *viodev,
unsigned long flags;
int ret = 0;
new_devdata = kzalloc(sizeof(*new_devdata), GFP_NOFS);
if (!new_devdata)
return -ENOMEM;
new_devdata->counters = kzalloc(sizeof(*new_devdata->counters),
GFP_NOFS);
if (!new_devdata->counters) {
kfree(new_devdata);
return -ENOMEM;
}
spin_lock_irqsave(&devdata_mutex, flags);
old_devdata = rcu_dereference_check(devdata,
lockdep_is_held(&devdata_mutex));
@ -978,21 +987,6 @@ static int nx842_probe(struct vio_dev *viodev,
dev_set_drvdata(&viodev->dev, NULL);
new_devdata = kzalloc(sizeof(*new_devdata), GFP_NOFS);
if (!new_devdata) {
dev_err(&viodev->dev, "%s: Could not allocate memory for device data\n", __func__);
ret = -ENOMEM;
goto error_unlock;
}
new_devdata->counters = kzalloc(sizeof(*new_devdata->counters),
GFP_NOFS);
if (!new_devdata->counters) {
dev_err(&viodev->dev, "%s: Could not allocate memory for performance counters\n", __func__);
ret = -ENOMEM;
goto error_unlock;
}
new_devdata->vdev = viodev;
new_devdata->dev = &viodev->dev;
nx842_OF_set_defaults(new_devdata);