Cc: stable James/linux-scsi,
The following patch from Kashyap Desai for megaraid_sas moves the
poll_aen_lock initializer from megasas_probe_one() to megasas_init().
This prevents a crash when a user loads the driver and tries to issue
a poll() system call on the ioctl interface with no adapters present.
Signed-off-by: Kashyap Desai <kashyap.de...@lsi.com>
Signed-off-by: Adam Radford <aradf...@gmail.com>
diff -Naur scsi/drivers/scsi/megaraid/megaraid_sas_base.c
scsi.new/drivers/scsi/megaraid/megaraid_sas_base.c
--- scsi/drivers/scsi/megaraid/megaraid_sas_base.c 2012-07-17
14:57:32.890231627 -0700
+++ scsi.new/drivers/scsi/megaraid/megaraid_sas_base.c 2012-07-17
14:59:37.285232167 -0700
@@ -4095,7 +4095,6 @@
spin_lock_init(&instance->cmd_pool_lock);
spin_lock_init(&instance->hba_lock);
spin_lock_init(&instance->completion_lock);
- spin_lock_init(&poll_aen_lock);
mutex_init(&instance->aen_mutex);
mutex_init(&instance->reset_mutex);
@@ -5421,6 +5420,8 @@
printk(KERN_INFO "megasas: %s %s\n", MEGASAS_VERSION,
MEGASAS_EXT_VERSION);
+ spin_lock_init(&poll_aen_lock);
+
support_poll_for_event = 2;
support_device_change = 1;
megaraid_sas.patch4
Description: Binary data
