This is a note to let you know that I've just added the patch titled
scsi: dpt_i2o: Do not process completions with invalid addresses
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
scsi-dpt_i2o-do-not-process-completions-with-invalid-addresses.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From c5b94ca174d28cf144665527236638e96b7fc758 Mon Sep 17 00:00:00 2001
From: Ben Hutchings <benh@xxxxxxxxxx>
Date: Sat, 27 May 2023 15:52:48 +0200
Subject: scsi: dpt_i2o: Do not process completions with invalid addresses
From: Ben Hutchings <benh@xxxxxxxxxx>
adpt_isr() reads reply addresses from a hardware register, which
should always be within the DMA address range of the device's pool of
reply address buffers. In case the address is out of range, it tries
to muddle on, converting to a virtual address using bus_to_virt().
bus_to_virt() does not take DMA addresses, and it doesn't make sense
to try to handle the completion in this case. Ignore it and continue
looping to service the interrupt. If a completion has been lost then
the SCSI core should eventually time-out and trigger a reset.
There is no corresponding upstream commit, because this driver was
removed upstream.
Fixes: 67af2b060e02 ("[SCSI] dpt_i2o: move from virt_to_bus/bus_to_virt ...")
Signed-off-by: Ben Hutchings <benh@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/scsi/Kconfig | 2 +-
drivers/scsi/dpt_i2o.c | 4 ++--
2 files changed, 3 insertions(+), 3 deletions(-)
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -473,7 +473,7 @@ config SCSI_MVUMI
config SCSI_DPT_I2O
tristate "Adaptec I2O RAID support "
- depends on SCSI && PCI && VIRT_TO_BUS
+ depends on SCSI && PCI
help
This driver supports all of Adaptec's I2O based RAID controllers as
well as the DPT SmartRaid V cards. This is an Adaptec maintained
--- a/drivers/scsi/dpt_i2o.c
+++ b/drivers/scsi/dpt_i2o.c
@@ -59,7 +59,7 @@ MODULE_DESCRIPTION("Adaptec I2O RAID Dri
#include <asm/processor.h> /* for boot_cpu_data */
#include <asm/pgtable.h>
-#include <asm/io.h> /* for virt_to_bus, etc. */
+#include <asm/io.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
@@ -1914,7 +1914,7 @@ static irqreturn_t adpt_isr(int irq, voi
} else {
/* Ick, we should *never* be here */
printk(KERN_ERR "dpti: reply frame not from pool\n");
- reply = (u8 *)bus_to_virt(m);
+ continue;
}
if (readl(reply) & MSG_FAIL) {
Patches currently in stable-queue which might be from benh@xxxxxxxxxx are
queue-4.19/scsi-dpt_i2o-remove-broken-pass-through-ioctl-i2ousercmd.patch
queue-4.19/scsi-dpt_i2o-do-not-process-completions-with-invalid-addresses.patch
