0ca3a017a7
This patch applies the mutex so far only protecting the controller list to (almost) all accesses of controller data structures. It also reworks waiting on state changes in old_capi_manufacturer so that it no longer poll and holds a module reference to the controller owner while waiting (the latter was partly done already). Modification and checking of the blocked state remains racy by design, the caller is responsible for dealing with this. Signed-off-by: Jan Kiszka <jan.kiszka@web.de> Signed-off-by: David S. Miller <davem@davemloft.net>
52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
/*
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* Kernel CAPI 2.0 Module
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*
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* Copyright 1999 by Carsten Paeth <calle@calle.de>
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* Copyright 2002 by Kai Germaschewski <kai@germaschewski.name>
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*
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* This software may be used and distributed according to the terms
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* of the GNU General Public License, incorporated herein by reference.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/spinlock.h>
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#include <linux/list.h>
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#include <linux/isdn/capilli.h>
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#ifdef KCAPI_DEBUG
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#define DBG(format, arg...) do { \
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printk(KERN_DEBUG "%s: " format "\n" , __func__ , ## arg); \
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} while (0)
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#else
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#define DBG(format, arg...) /* */
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#endif
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enum {
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CAPI_CTR_DETACHED = 0,
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CAPI_CTR_DETECTED = 1,
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CAPI_CTR_LOADING = 2,
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CAPI_CTR_RUNNING = 3,
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};
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extern struct list_head capi_drivers;
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extern struct mutex capi_drivers_lock;
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extern struct capi_ctr *capi_controller[CAPI_MAXCONTR];
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extern struct mutex capi_controller_lock;
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extern struct capi20_appl *capi_applications[CAPI_MAXAPPL];
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#ifdef CONFIG_PROC_FS
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void kcapi_proc_init(void);
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void kcapi_proc_exit(void);
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#else
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static inline void kcapi_proc_init(void) { };
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static inline void kcapi_proc_exit(void) { };
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#endif
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