forked from ~ljy/RK356X_SDK_RELEASE

blame | history | patch | commit | commitdiff
hc
2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 
 kernel/arch/um/kernel/irq.c
....@@ -1,8 +1,8 @@
1
+// SPDX-License-Identifier: GPL-2.0
12 /*
23  * Copyright (C) 2017 - Cambridge Greys Ltd
34  * Copyright (C) 2011 - 2014 Cisco Systems Inc
45  * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
5
- * Licensed under the GPL
66  * Derived (i.e. mostly copied) from arch/i386/kernel/irq.c:
77  *	Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
88  */
....@@ -248,8 +248,7 @@
248248 			to_free = NULL;
249249 		}
250250 		walk = walk->next;
251
-		if (to_free != NULL)
252
-			kfree(to_free);
251
+		kfree(to_free);
253252 	}
254253 }
255254 
....@@ -355,11 +354,6 @@
355354 }
356355 
357356 
358
-void reactivate_fd(int fd, int irqnum)
359
-{
360
-	/** NOP - we do auto-EOI now **/
361
-}
362
-
363357 void deactivate_fd(int fd, int irqnum)
364358 {
365359 	struct irq_entry *to_free;
....@@ -390,10 +384,8 @@
390384  */
391385 int deactivate_all_fds(void)
392386 {
393
-	unsigned long flags;
394387 	struct irq_entry *to_free;
395388 
396
-	spin_lock_irqsave(&irq_lock, flags);
397389 	/* Stop IO. The IRQ loop has no lock so this is our
398390 	 * only way of making sure we are safe to dispose
399391 	 * of all IRQ handlers
....@@ -409,8 +401,7 @@
409401 		);
410402 		to_free = to_free->next;
411403 	}
412
-	garbage_collect_irq_entries();
413
-	spin_unlock_irqrestore(&irq_lock, flags);
404
+	/* don't garbage collect - we can no longer call kfree() here */
414405 	os_close_epoll_fd();
415406 	return 0;
416407 }
....@@ -454,7 +445,6 @@
454445 }
455446 
456447 EXPORT_SYMBOL(um_request_irq);
457
-EXPORT_SYMBOL(reactivate_fd);
458448 
459449 /*
460450  * irq_chip must define at least enable/disable and ack when