File 521db25f-Fix-inactive-timer-list-corruption-on-... of Package xen

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File 521db25f-Fix-inactive-timer-list-corruption-on-second-S3-resume.patch of Package xen (Revision 6697a53932dbbbc9a196cf0c529c9c70)

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# Commit 9e2c5938246546a5b3f698b7421640d85602b994
# Date 2013-08-28 10:18:39 +0200
# Author Tomasz Wroblewski <tomasz.wroblewski@citrix.com>
# Committer Jan Beulich <jbeulich@suse.com>
Fix inactive timer list corruption on second S3 resume

init_timer cannot be safely called multiple times on same timer since it does memset(0)
on the structure, erasing the auxiliary member used by linked list code. This breaks
inactive timer list in common/timer.c.

Moved resume_timer initialisation to ns16550_init_postirq, so it's only done once.

Signed-off-by: Tomasz Wroblewski <tomasz.wroblewski@citrix.com>
Acked-by: Keir Fraser <keir@xen.org>

--- a/xen/drivers/char/ns16550.c
+++ b/xen/drivers/char/ns16550.c
@@ -128,6 +128,8 @@ static struct ns16550 {
 #define RESUME_DELAY    MILLISECS(10)
 #define RESUME_RETRIES  100
 
+static void ns16550_delayed_resume(void *data);
+
 static char ns_read_reg(struct ns16550 *uart, int reg)
 {
     if ( uart->remapped_io_base == NULL )
@@ -323,6 +325,7 @@ static void __init ns16550_init_postirq(
     serial_async_transmit(port);
 
     init_timer(&uart->timer, ns16550_poll, port, 0);
+    init_timer(&uart->resume_timer, ns16550_delayed_resume, port, 0);
 
     /* Calculate time to fill RX FIFO and/or empty TX FIFO for polling. */
     bits = uart->data_bits + uart->stop_bits + !!uart->parity;
@@ -413,7 +416,6 @@ static void ns16550_resume(struct serial
     if ( ns16550_ioport_invalid(uart) )
     {
         delayed_resume_tries = RESUME_RETRIES;
-        init_timer(&uart->resume_timer, ns16550_delayed_resume, port, 0);
         set_timer(&uart->resume_timer, NOW() + RESUME_DELAY);
     }
     else

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File 521db25f-Fix-inactive-timer-list-corruption-on-second-S3-resume.patch of Package xen (Revision 6697a53932dbbbc9a196cf0c529c9c70)

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