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authorRichard Purdie <rpurdie@linux.intel.com>2009-04-21 17:33:19 +0100
committerRichard Purdie <rpurdie@linux.intel.com>2009-04-21 17:33:19 +0100
commitf114fd24924540dd5dfbd7483824d6b30c246bc6 (patch)
tree42936b142dd203c63f5133c95163400641a7ffdf /meta-moblin/packages/linux/linux-moblin-2.6.29.1/linux-2.6.30-fix-suspend.patch
parente23c356916550cafbe3a93b28b76e762cb5043b7 (diff)
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linux-moblin: Switch to 2.6.29.1
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
Diffstat (limited to 'meta-moblin/packages/linux/linux-moblin-2.6.29.1/linux-2.6.30-fix-suspend.patch')
-rw-r--r--meta-moblin/packages/linux/linux-moblin-2.6.29.1/linux-2.6.30-fix-suspend.patch139
1 files changed, 139 insertions, 0 deletions
diff --git a/meta-moblin/packages/linux/linux-moblin-2.6.29.1/linux-2.6.30-fix-suspend.patch b/meta-moblin/packages/linux/linux-moblin-2.6.29.1/linux-2.6.30-fix-suspend.patch
new file mode 100644
index 000000000..3932a51ae
--- /dev/null
+++ b/meta-moblin/packages/linux/linux-moblin-2.6.29.1/linux-2.6.30-fix-suspend.patch
@@ -0,0 +1,139 @@
+From: Rafael J. Wysocki <rjw@suse.com>
+Organization: SUSE
+To: Arjan van de Ven <arjan@linux.intel.com>
+CC: Linus Torvalds <torvalds@linux-foundation.org>
+
+
+OK, updated patch follows, with a changelog.
+
+I've added this check to user.c too, because that code can be called
+independently of the one in disk.c . Also, if resume is user space-driven,
+it's a good idea to wait for all of the device probes to complete before
+continuing.
+
+Thanks,
+Rafael
+
+---
+From: Rafael J. Wysocki <rjw@sisk.pl>
+Subject: PM/Hibernate: Wait for SCSI devices scan to complete during resume
+
+There is a race between resume from hibernation and the asynchronous
+scanning of SCSI devices and to prevent it from happening we need to
+call scsi_complete_async_scans() during resume from hibernation.
+
+In addition, if the resume from hibernation is userland-driven, it's
+better to wait for all device probes in the kernel to complete before
+attempting to open the resume device.
+
+Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
+---
+ drivers/scsi/scsi_priv.h | 3 ---
+ drivers/scsi/scsi_wait_scan.c | 2 +-
+ include/scsi/scsi_scan.h | 11 +++++++++++
+ kernel/power/disk.c | 8 ++++++++
+ kernel/power/user.c | 9 +++++++++
+ 5 files changed, 29 insertions(+), 4 deletions(-)
+
+Index: linux-2.6/include/scsi/scsi_scan.h
+===================================================================
+--- /dev/null
++++ linux-2.6/include/scsi/scsi_scan.h
+@@ -0,0 +1,11 @@
++#ifndef _SCSI_SCSI_SCAN_H
++#define _SCSI_SCSI_SCAN_H
++
++#ifdef CONFIG_SCSI
++/* drivers/scsi/scsi_scan.c */
++extern int scsi_complete_async_scans(void);
++#else
++static inline int scsi_complete_async_scans(void) { return 0; }
++#endif
++
++#endif /* _SCSI_SCSI_SCAN_H */
+Index: linux-2.6/drivers/scsi/scsi_priv.h
+===================================================================
+--- linux-2.6.orig/drivers/scsi/scsi_priv.h
++++ linux-2.6/drivers/scsi/scsi_priv.h
+@@ -38,9 +38,6 @@ static inline void scsi_log_completion(s
+ { };
+ #endif
+
+-/* scsi_scan.c */
+-int scsi_complete_async_scans(void);
+-
+ /* scsi_devinfo.c */
+ extern int scsi_get_device_flags(struct scsi_device *sdev,
+ const unsigned char *vendor,
+Index: linux-2.6/drivers/scsi/scsi_wait_scan.c
+===================================================================
+--- linux-2.6.orig/drivers/scsi/scsi_wait_scan.c
++++ linux-2.6/drivers/scsi/scsi_wait_scan.c
+@@ -11,7 +11,7 @@
+ */
+
+ #include <linux/module.h>
+-#include "scsi_priv.h"
++#include <scsi/scsi_scan.h>
+
+ static int __init wait_scan_init(void)
+ {
+Index: linux-2.6/kernel/power/disk.c
+===================================================================
+--- linux-2.6.orig/kernel/power/disk.c
++++ linux-2.6/kernel/power/disk.c
+@@ -22,5 +22,6 @@
+ #include <linux/console.h>
+ #include <linux/cpu.h>
+ #include <linux/freezer.h>
++#include <scsi/scsi_scan.h>
+
+ #include "power.h"
+@@ -645,6 +646,13 @@ static int software_resume(void)
+ return 0;
+
+ /*
++ * We can't depend on SCSI devices being available after loading one of
++ * their modules if scsi_complete_async_scans() is not called and the
++ * resume device usually is a SCSI one.
++ */
++ scsi_complete_async_scans();
++
++ /*
+ * name_to_dev_t() below takes a sysfs buffer mutex when sysfs
+ * is configured into the kernel. Since the regular hibernate
+ * trigger path is via sysfs which takes a buffer mutex before
+Index: linux-2.6/kernel/power/user.c
+===================================================================
+--- linux-2.6.orig/kernel/power/user.c
++++ linux-2.6/kernel/power/user.c
+@@ -24,6 +24,7 @@
+ #include <linux/cpu.h>
+ #include <linux/freezer.h>
+ #include <linux/smp_lock.h>
++#include <scsi/scsi_scan.h>
+
+ #include <asm/uaccess.h>
+
+@@ -92,6 +93,7 @@ static int snapshot_open(struct inode *i
+ filp->private_data = data;
+ memset(&data->handle, 0, sizeof(struct snapshot_handle));
+ if ((filp->f_flags & O_ACCMODE) == O_RDONLY) {
++ /* Hibernating. The image device should be accessible. */
+ data->swap = swsusp_resume_device ?
+ swap_type_of(swsusp_resume_device, 0, NULL) : -1;
+ data->mode = O_RDONLY;
+@@ -99,6 +101,13 @@ static int snapshot_open(struct inode *i
+ if (error)
+ pm_notifier_call_chain(PM_POST_HIBERNATION);
+ } else {
++ /*
++ * Resuming. We may need to wait for the image device to
++ * appear.
++ */
++ wait_for_device_probe();
++ scsi_complete_async_scans();
++
+ data->swap = -1;
+ data->mode = O_WRONLY;
+ error = pm_notifier_call_chain(PM_RESTORE_PREPARE);