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drivers/edac: fix edac_device semaphore to mutex
A previous patch changed the edac_mc src file from semaphore usage to mutex This patch changes the edac_device src file as well, from semaphore use to mutex operation. Use a mutex primitive for mutex operations, as it does not require a semaphore Cc: Alan Cox alan@lxorguk.ukuu.org.uk Signed-off-by: Doug Thompson <dougthompson@xmission.com> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -33,7 +33,7 @@
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#include "edac_module.h"
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/* lock to memory controller's control array 'edac_device_list' */
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static DECLARE_MUTEX(device_ctls_mutex);
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static DEFINE_MUTEX(device_ctls_mutex);
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static struct list_head edac_device_list = LIST_HEAD_INIT(edac_device_list);
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#ifdef CONFIG_EDAC_DEBUG
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@ -340,7 +340,7 @@ static void edac_device_workq_function(struct work_struct *work_req)
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struct edac_device_ctl_info *edac_dev = to_edac_device_ctl_work(d_work);
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//debugf0("%s() here and running\n", __func__);
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down(&device_ctls_mutex);
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mutex_lock(&device_ctls_mutex);
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/* Only poll controllers that are running polled and have a check */
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if ((edac_dev->op_state == OP_RUNNING_POLL) &&
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@ -348,7 +348,7 @@ static void edac_device_workq_function(struct work_struct *work_req)
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edac_dev->edac_check(edac_dev);
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}
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up(&device_ctls_mutex);
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mutex_unlock(&device_ctls_mutex);
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/* Reschedule */
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queue_delayed_work(edac_workqueue, &edac_dev->work, edac_dev->delay);
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@ -393,7 +393,7 @@ void edac_device_workq_teardown(struct edac_device_ctl_info *edac_dev)
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void edac_device_reset_delay_period(struct edac_device_ctl_info *edac_dev,
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unsigned long value)
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{
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down(&device_ctls_mutex);
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mutex_lock(&device_ctls_mutex);
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/* cancel the current workq request */
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edac_device_workq_teardown(edac_dev);
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@ -401,7 +401,7 @@ void edac_device_reset_delay_period(struct edac_device_ctl_info *edac_dev,
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/* restart the workq request, with new delay value */
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edac_device_workq_setup(edac_dev, value);
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up(&device_ctls_mutex);
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mutex_unlock(&device_ctls_mutex);
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}
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/**
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@ -425,7 +425,7 @@ int edac_device_add_device(struct edac_device_ctl_info *edac_dev, int edac_idx)
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if (edac_debug_level >= 3)
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edac_device_dump_device(edac_dev);
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#endif
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down(&device_ctls_mutex);
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mutex_lock(&device_ctls_mutex);
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if (add_edac_dev_to_global_list(edac_dev))
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goto fail0;
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@ -463,7 +463,7 @@ int edac_device_add_device(struct edac_device_ctl_info *edac_dev, int edac_idx)
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dev_name(edac_dev),
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edac_op_state_to_string(edac_dev->op_state));
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up(&device_ctls_mutex);
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mutex_unlock(&device_ctls_mutex);
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return 0;
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fail1:
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@ -471,7 +471,7 @@ fail1:
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del_edac_device_from_global_list(edac_dev);
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fail0:
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up(&device_ctls_mutex);
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mutex_unlock(&device_ctls_mutex);
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return 1;
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}
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EXPORT_SYMBOL_GPL(edac_device_add_device);
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@ -495,12 +495,12 @@ struct edac_device_ctl_info *edac_device_del_device(struct device *dev)
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debugf0("MC: %s()\n", __func__);
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down(&device_ctls_mutex);
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mutex_lock(&device_ctls_mutex);
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/* Find the structure on the list, if not there, then leave */
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edac_dev = find_edac_device_by_dev(dev);
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if (edac_dev == NULL) {
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up(&device_ctls_mutex);
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mutex_unlock(&device_ctls_mutex);
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return NULL;
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}
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@ -516,7 +516,7 @@ struct edac_device_ctl_info *edac_device_del_device(struct device *dev)
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/* deregister from global list */
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del_edac_device_from_global_list(edac_dev);
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up(&device_ctls_mutex);
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mutex_unlock(&device_ctls_mutex);
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edac_printk(KERN_INFO, EDAC_MC,
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"Removed device %d for %s %s: DEV %s\n",
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