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drivers: Disable priority inheritance on all semaphores used for signaling

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This commit is contained in:
Gregory Nutt
2016-11-03 11:00:47 -06:00
parent bdde5720ca
commit 4fcbe8e410
20 changed files with 184 additions and 19 deletions
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drivers/usbdev/usbmsc.c
+11 -1
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@@ -75,6 +75,7 @@
#include <nuttx/kmalloc.h>
#include <nuttx/kthread.h>
#include <nuttx/arch.h>
#include <nuttx/semaphore.h>
#include <nuttx/fs/fs.h>
#include <nuttx/usb/usb.h>
#include <nuttx/usb/storage.h>
@@ -1339,11 +1340,20 @@ int usbmsc_configure(unsigned int nluns, void **handle)
priv = &alloc->dev;
memset(priv, 0, sizeof(struct usbmsc_dev_s));
/* Initialize semaphores */
sem_init(&priv->thsynch, 0, 0);
sem_init(&priv->thlock, 0, 1);
sem_init(&priv->thwaitsem, 0, 0);
sq_init(&priv->wrreqlist);
/* The thsynch and thwaitsem semaphores are used for signaling and, hence,
* should not have priority inheritance enabled.
*/
sem_setprotocol(&priv->thsynch, SEM_PRIO_NONE);
sem_setprotocol(&priv->thwaitsem, SEM_PRIO_NONE);
sq_init(&priv->wrreqlist);
priv->nluns = nluns;
/* Allocate the LUN table */