These represent what I think are the essential fixes before we go
2.6.26. All except two fix basic oopses. One of the non-oops fixes is
the bogus data erase which makes certain USB devices no longer read
only; the other is to turn off MSI on fusion FC and SPI. This fixes
quite a lot of hung boots because of lost interrupts.

The patch is available from:

master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6.git

The short changelog is:

Alan Stern (1):
erase invalid data returned by device

Brian King (1):
ipr: Fix HDIO_GET_IDENTITY oops for SATA devices

James Bottomley (3):
bsg: fix oops on remove
fusion: default MSI to disabled for SPI and FC controllers
mptspi: fix oops in mptspi_dv_renegotiate_work()

The diffstat is:

block/bsg.c | 3 ++-
drivers/message/fusion/mptbase.c | 11 ++++++++---
drivers/message/fusion/mptspi.c | 9 +++++++--
drivers/scsi/ipr.c | 6 +++++-
drivers/scsi/scsi_lib.c | 9 +++++++++
5 files changed, 31 insertions(+), 7 deletions(-)

And the entire diff is attached below.

James

---

diff --git a/block/bsg.c b/block/bsg.c
index f0b7cd3..54d617f 100644
--- a/block/bsg.c
+++ b/block/bsg.c
@@ -709,11 +709,12 @@ static void bsg_kref_release_function(struct kref *kref)
{
struct bsg_class_device *bcd =
container_of(kref, struct bsg_class_device, ref);
+ struct device *parent = bcd->parent;

if (bcd->release)
bcd->release(bcd->parent);

- put_device(bcd->parent);
+ put_device(parent);
}

static int bsg_put_device(struct bsg_device *bd)
diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c
index db3c892..d40d6d1 100644
--- a/drivers/message/fusion/mptbase.c
+++ b/drivers/message/fusion/mptbase.c
@@ -1686,9 +1686,14 @@ mpt_attach(struct pci_dev *pdev, const struct pci_device_id *id)
ioc->bus_type = SAS;
}

- if (ioc->bus_type == SAS && mpt_msi_enable == -1)
- ioc->msi_enable = 1;
- else
+ if (mpt_msi_enable == -1) {
+ /* Enable on SAS, disable on FC and SPI */
+ if (ioc->bus_type == SAS)
+ ioc->msi_enable = 1;
+ else
+ ioc->msi_enable = 0;
+ } else
+ /* follow flag: 0 - disable; 1 - enable */
ioc->msi_enable = mpt_msi_enable;

if (ioc->errata_flag_1064)
diff --git a/drivers/message/fusion/mptspi.c b/drivers/message/fusion/mptspi.c
index 25bcfcf..1effca4 100644
--- a/drivers/message/fusion/mptspi.c
+++ b/drivers/message/fusion/mptspi.c
@@ -1266,13 +1266,18 @@ mptspi_dv_renegotiate(struct _MPT_SCSI_HOST *hd)
static int
mptspi_ioc_reset(MPT_ADAPTER *ioc, int reset_phase)
{
- struct _MPT_SCSI_HOST *hd = shost_priv(ioc->sh);
int rc;

rc = mptscsih_ioc_reset(ioc, reset_phase);

- if (reset_phase == MPT_IOC_POST_RESET)
+ /* only try to do a renegotiation if we're properly set up
+ * if we get an ioc fault on bringup, ioc->sh will be NULL */
+ if (reset_phase == MPT_IOC_POST_RESET &&
+ ioc->sh) {
+ struct _MPT_SCSI_HOST *hd = shost_priv(ioc->sh);
+
mptspi_dv_renegotiate(hd);
+ }

return rc;
}
diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index 999e91e..e7a3a65 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -71,6 +71,7 @@
#include
#include
#include
+#include
#include
#include
#include
@@ -4913,8 +4914,11 @@ static int ipr_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
struct ipr_resource_entry *res;

res = (struct ipr_resource_entry *)sdev->hostdata;
- if (res && ipr_is_gata(res))
+ if (res && ipr_is_gata(res)) {
+ if (cmd == HDIO_GET_IDENTITY)
+ return -ENOTTY;
return ata_scsi_ioctl(sdev, cmd, arg);
+ }

return -EINVAL;
}
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index a82d2fe..cbf55d5 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -207,6 +207,15 @@ int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
*/
blk_execute_rq(req->q, NULL, req, 1);

+ /*
+ * Some devices (USB mass-storage in particular) may transfer
+ * garbage data together with a residue indicating that the data
+ * is invalid. Prevent the garbage from being misinterpreted
+ * and prevent security leaks by zeroing out the excess data.
+ */
+ if (unlikely(req->data_len > 0 && req->data_len <= bufflen))
+ memset(buffer + (bufflen - req->data_len), 0, req->data_len);
+
ret = req->errors;
out:
blk_put_request(req);


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