The patch titled
megaraid: fix mega_internal_command oops
has been removed from the -mm tree. Its filename was
megaraid-fix-mega_internal_command-oops.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: megaraid: fix mega_internal_command oops
From: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx>
scsi_cmnd->cmnd was changed from a static array to a pointer post
2.6.25. It breaks mega_internal_command():
static int
mega_internal_command(adapter_t *adapter, megacmd_t *mc, mega_passthru *pthru)
{
...
scb = &adapter->int_scb;
memset(scb, 0, sizeof(scb_t));
scmd = &adapter->int_scmd;
memset(scmd, 0, sizeof(Scsi_Cmnd));
sdev = kzalloc(sizeof(struct scsi_device), GFP_KERNEL);
scmd->device = sdev;
scmd->device->host = adapter->host;
scmd->host_scribble = (void *)scb;
scmd->cmnd[0] = MEGA_INTERNAL_CMD;
mega_internal_command() uses scsi_cmnd allocated internally so
scmd->cmnd is NULL here. This patch adds a static array for cdb to
adapter_t and uses it here. This also uses
scsi_allocate_command/scsi_free_command, the recommended way to
allocate struct scsi_cmnd since the driver might use sense_buffer in
struct scsi_cmnd.
Addresses http://bugzilla.kernel.org/show_bug.cgi?id=11792
Signed-off-by: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx>
Reviewed-by: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
Tested-by: Pascal Terjan <pterjan@xxxxxxxxx>
Reported-by: Pascal Terjan <pterjan@xxxxxxxxx>
Cc: "Yang, Bo" <Bo.Yang@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/scsi/megaraid.c | 11 ++++++++---
drivers/scsi/megaraid.h | 2 +-
2 files changed, 9 insertions(+), 4 deletions(-)
diff -puN drivers/scsi/megaraid.c~megaraid-fix-mega_internal_command-oops drivers/scsi/megaraid.c
--- a/drivers/scsi/megaraid.c~megaraid-fix-mega_internal_command-oops
+++ a/drivers/scsi/megaraid.c
@@ -4402,6 +4402,10 @@ mega_internal_command(adapter_t *adapter
scb_t *scb;
int rval;
+ scmd = scsi_allocate_command(GFP_KERNEL);
+ if (!scmd)
+ return -ENOMEM;
+
/*
* The internal commands share one command id and hence are
* serialized. This is so because we want to reserve maximum number of
@@ -4412,12 +4416,11 @@ mega_internal_command(adapter_t *adapter
scb = &adapter->int_scb;
memset(scb, 0, sizeof(scb_t));
- scmd = &adapter->int_scmd;
- memset(scmd, 0, sizeof(Scsi_Cmnd));
-
sdev = kzalloc(sizeof(struct scsi_device), GFP_KERNEL);
scmd->device = sdev;
+ memset(adapter->int_cdb, 0, sizeof(adapter->int_cdb));
+ scmd->cmnd = adapter->int_cdb;
scmd->device->host = adapter->host;
scmd->host_scribble = (void *)scb;
scmd->cmnd[0] = MEGA_INTERNAL_CMD;
@@ -4456,6 +4459,8 @@ mega_internal_command(adapter_t *adapter
mutex_unlock(&adapter->int_mtx);
+ scsi_free_command(GFP_KERNEL, scmd);
+
return rval;
}
diff -puN drivers/scsi/megaraid.h~megaraid-fix-mega_internal_command-oops drivers/scsi/megaraid.h
--- a/drivers/scsi/megaraid.h~megaraid-fix-mega_internal_command-oops
+++ a/drivers/scsi/megaraid.h
@@ -888,8 +888,8 @@ typedef struct {
u8 sglen; /* f/w supported scatter-gather list length */
+ unsigned char int_cdb[MAX_COMMAND_SIZE];
scb_t int_scb;
- Scsi_Cmnd int_scmd;
struct mutex int_mtx; /* To synchronize the internal
commands */
struct completion int_waitq; /* wait queue for internal
_
Patches currently in -mm which might be from fujita.tomonori@xxxxxxxxxxxxx are
linux-next.patch
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