This patch adds handler to get reboot notification and fires flush command from
the reboot notification handler.
Signed-off-by: Sumant Patro <[email protected]>
diff -uprN linux-2.6orig/drivers/scsi/megaraid/megaraid_sas.c linux-2.6new/drivers/scsi/megaraid/megaraid_sas.c
--- linux-2.6orig/drivers/scsi/megaraid/megaraid_sas.c 2006-09-20 11:04:34.000000000 -0700
+++ linux-2.6new/drivers/scsi/megaraid/megaraid_sas.c 2006-09-20 11:05:52.000000000 -0700
@@ -36,6 +36,8 @@
#include <linux/fs.h>
#include <linux/compat.h>
#include <linux/mutex.h>
+#include <linux/reboot.h>
+#include <linux/notifier.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
@@ -2351,6 +2353,36 @@ static void megasas_flush_cache(struct m
}
/**
+ * megasas_reboot_notify- Flush adapter cache
+ * @this: Our notifier block
+ * @code: The event notified
+ * @unused: Unused
+ */
+static int
+megasas_reboot_notify (struct notifier_block *this, unsigned long code,
+ void *unused)
+{
+ struct megasas_instance *instance;
+ int i;
+
+ for (i = 0; i < megasas_mgmt_info.max_index; i++) {
+ instance = megasas_mgmt_info.instance[i];
+ if (instance) {
+ megasas_flush_cache(instance);
+ }
+ }
+
+ return NOTIFY_DONE;
+}
+
+/**
+ * notifier block to get notification on system halt/reboot/shutdown/power off
+ */
+static struct notifier_block megasas_notifier = {
+ .notifier_call = megasas_reboot_notify
+};
+
+/**
* megasas_shutdown_controller - Instructs FW to shutdown the controller
* @instance: Adapter soft state
*/
@@ -2903,6 +2935,10 @@ static int __init megasas_init(void)
driver_create_file(&megasas_pci_driver.driver,
&driver_attr_release_date);
+ if(register_reboot_notifier(&megasas_notifier)) {
+ printk("megasas: reboot notify routine registration failed!!\n");
+ }
+
return rval;
}
@@ -2917,6 +2953,7 @@ static void __exit megasas_exit(void)
pci_unregister_driver(&megasas_pci_driver);
unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
+ unregister_reboot_notifier(&megasas_notifier);
}
module_init(megasas_init);
On Wed, Sep 20, 2006 at 07:02:51PM -0700, Sumant Patro wrote:
> This patch adds handler to get reboot notification and fires flush command from
> the reboot notification handler.
NACK, this should be handled by the PCI driver ->shutdown method instead.
I agree.
Regards,
Sumant
-----Original Message-----
From: Christoph Hellwig [mailto:[email protected]]
Sent: Thursday, September 21, 2006 4:44 AM
To: Patro, Sumant
Cc: [email protected]; [email protected];
[email protected]; [email protected]; [email protected]; Kolli, Neela;
Yang, Bo
Subject: Re: [Patch 4/7] megaraid_sas: adds reboot handler
On Wed, Sep 20, 2006 at 07:02:51PM -0700, Sumant Patro wrote:
> This patch adds handler to get reboot notification and fires flush
command from
> the reboot notification handler.
NACK, this should be handled by the PCI driver ->shutdown method
instead.