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hc
2024-02-19 1c055e55a242a33e574e48be530e06770a210dcd 
 kernel/sound/core/seq/seq_memory.c
....@@ -1,30 +1,16 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23  *  ALSA sequencer Memory Manager
34  *  Copyright (c) 1998 by Frank van de Pol <fvdpol@coil.demon.nl>
45  *                        Jaroslav Kysela <perex@perex.cz>
56  *                2000 by Takashi Iwai <tiwai@suse.de>
6
- *
7
- *   This program is free software; you can redistribute it and/or modify
8
- *   it under the terms of the GNU General Public License as published by
9
- *   the Free Software Foundation; either version 2 of the License, or
10
- *   (at your option) any later version.
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- *
12
- *   This program is distributed in the hope that it will be useful,
13
- *   but WITHOUT ANY WARRANTY; without even the implied warranty of
14
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- *   GNU General Public License for more details.
16
- *
17
- *   You should have received a copy of the GNU General Public License
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- *   along with this program; if not, write to the Free Software
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- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
20
- *
217  */
228 
239 #include <linux/init.h>
2410 #include <linux/export.h>
2511 #include <linux/slab.h>
2612 #include <linux/sched/signal.h>
27
-#include <linux/vmalloc.h>
13
+#include <linux/mm.h>
2814 #include <sound/core.h>
2915 
3016 #include <sound/seq_kernel.h>
....@@ -126,15 +112,19 @@
126112  * expand the variable length event to linear buffer space.
127113  */
128114 
129
-static int seq_copy_in_kernel(char **bufptr, const void *src, int size)
115
+static int seq_copy_in_kernel(void *ptr, void *src, int size)
130116 {
117
+	char **bufptr = ptr;
118
+
131119 	memcpy(*bufptr, src, size);
132120 	*bufptr += size;
133121 	return 0;
134122 }
135123 
136
-static int seq_copy_in_user(char __user **bufptr, const void *src, int size)
124
+static int seq_copy_in_user(void *ptr, void *src, int size)
137125 {
126
+	char __user **bufptr = ptr;
127
+
138128 	if (copy_to_user(*bufptr, src, size))
139129 		return -EFAULT;
140130 	*bufptr += size;
....@@ -163,8 +153,7 @@
163153 		return newlen;
164154 	}
165155 	err = snd_seq_dump_var_event(event,
166
-				     in_kernel ? (snd_seq_dump_func_t)seq_copy_in_kernel :
167
-				     (snd_seq_dump_func_t)seq_copy_in_user,
156
+				     in_kernel ? seq_copy_in_kernel : seq_copy_in_user,
168157 				     &buf);
169158 	return err < 0 ? err : newlen;
170159 }
....@@ -244,13 +233,13 @@
244233 
245234 		set_current_state(TASK_INTERRUPTIBLE);
246235 		add_wait_queue(&pool->output_sleep, &wait);
247
-		spin_unlock_irq(&pool->lock);
236
+		spin_unlock_irqrestore(&pool->lock, flags);
248237 		if (mutexp)
249238 			mutex_unlock(mutexp);
250239 		schedule();
251240 		if (mutexp)
252241 			mutex_lock(mutexp);
253
-		spin_lock_irq(&pool->lock);
242
+		spin_lock_irqsave(&pool->lock, flags);
254243 		remove_wait_queue(&pool->output_sleep, &wait);
255244 		/* interrupted? */
256245 		if (signal_pending(current)) {
....@@ -384,21 +373,20 @@
384373 {
385374 	int cell;
386375 	struct snd_seq_event_cell *cellptr;
387
-	unsigned long flags;
388376 
389377 	if (snd_BUG_ON(!pool))
390378 		return -EINVAL;
391379 
392
-	cellptr = vmalloc(array_size(sizeof(struct snd_seq_event_cell),
393
-				     pool->size));
380
+	cellptr = kvmalloc_array(sizeof(struct snd_seq_event_cell), pool->size,
381
+				 GFP_KERNEL);
394382 	if (!cellptr)
395383 		return -ENOMEM;
396384 
397385 	/* add new cells to the free cell list */
398
-	spin_lock_irqsave(&pool->lock, flags);
386
+	spin_lock_irq(&pool->lock);
399387 	if (pool->ptr) {
400
-		spin_unlock_irqrestore(&pool->lock, flags);
401
-		vfree(cellptr);
388
+		spin_unlock_irq(&pool->lock);
389
+		kvfree(cellptr);
402390 		return 0;
403391 	}
404392 
....@@ -416,7 +404,7 @@
416404 	/* init statistics */
417405 	pool->max_used = 0;
418406 	pool->total_elements = pool->size;
419
-	spin_unlock_irqrestore(&pool->lock, flags);
407
+	spin_unlock_irq(&pool->lock);
420408 	return 0;
421409 }
422410 
....@@ -435,7 +423,6 @@
435423 /* remove events */
436424 int snd_seq_pool_done(struct snd_seq_pool *pool)
437425 {
438
-	unsigned long flags;
439426 	struct snd_seq_event_cell *ptr;
440427 
441428 	if (snd_BUG_ON(!pool))
....@@ -449,18 +436,18 @@
449436 		schedule_timeout_uninterruptible(1);
450437 	
451438 	/* release all resources */
452
-	spin_lock_irqsave(&pool->lock, flags);
439
+	spin_lock_irq(&pool->lock);
453440 	ptr = pool->ptr;
454441 	pool->ptr = NULL;
455442 	pool->free = NULL;
456443 	pool->total_elements = 0;
457
-	spin_unlock_irqrestore(&pool->lock, flags);
444
+	spin_unlock_irq(&pool->lock);
458445 
459
-	vfree(ptr);
446
+	kvfree(ptr);
460447 
461
-	spin_lock_irqsave(&pool->lock, flags);
448
+	spin_lock_irq(&pool->lock);
462449 	pool->closing = 0;
463
-	spin_unlock_irqrestore(&pool->lock, flags);
450
+	spin_unlock_irq(&pool->lock);
464451 
465452 	return 0;
466453 }