- up to 3.2.7

[packages/kernel.git] / kernel-small_fixes.patch

--- linux-2.6.33/scripts/mod/modpost.c~	2010-02-24 19:52:17.000000000 +0100
+++ linux-2.6.33/scripts/mod/modpost.c	2010-03-07 14:26:47.242168558 +0100
@@ -15,7 +15,8 @@
 #include <stdio.h>
 #include <ctype.h>
 #include "modpost.h"
-#include "../../include/generated/autoconf.h"
+// PLD architectures don't use CONFIG_SYMBOL_PREFIX
+//#include "../../include/generated/autoconf.h"
 #include "../../include/linux/license.h"
 
 /* Some toolchains use a `_' prefix for all user symbols. */

commit 87b09f1f25cd1e01d7c50bf423c7fe33027d7511
Author: stephen hemminger <shemminger@vyatta.com>
Date:   Fri Feb 12 06:58:00 2010 +0000

    sky2: dont enable PME legacy mode
    
    This bit is not changed by vendor driver, and should be left alone.
    The documentation implies this a debug bit.
      0 = WAKE# only asserted when VMAIN not available
      1 = WAKE# is depend on wake events and independent of VMAIN.
    
    Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git b/drivers/net/ethernet/marvell/sky2.c a/drivers/net/ethernet/marvell/sky2.c
index 2494842..edf37aa 100644
--- b/drivers/net/ethernet/marvell/sky2.c
+++ a/drivers/net/ethernet/marvell/sky2.c
@@ -733,6 +733,7 @@ static void sky2_wol_init(struct sky2_port *sky2)
 	unsigned port = sky2->port;
 	enum flow_control save_mode;
 	u16 ctrl;
+	u32 reg1;
 
 	/* Bring hardware out of reset */
 	sky2_write16(hw, B0_CTST, CS_RST_CLR);
@@ -786,6 +787,11 @@ static void sky2_wol_init(struct sky2_port *sky2)
 	/* Disable PiG firmware */
 	sky2_write16(hw, B0_CTST, Y2_HW_WOL_OFF);
 
+	/* Turn on legacy PCI-Express PME mode */
+	reg1 = sky2_pci_read32(hw, PCI_DEV_REG1);
+	reg1 |= PCI_Y2_PME_LEGACY;
+	sky2_pci_write32(hw, PCI_DEV_REG1, reg1);
+
 	/* block receiver */
 	sky2_write8(hw, SK_REG(port, RX_GMF_CTRL_T), GMF_RST_SET);
 }
On Sat, 2 Jul 2011, Andi Kleen wrote:

> > The problem is that blk_peek_request() calls scsi_prep_fn(), which 
> > does this:
> > 
> > 	struct scsi_device *sdev = q->queuedata;
> > 	int ret = BLKPREP_KILL;
> > 
> > 	if (req->cmd_type == REQ_TYPE_BLOCK_PC)
> > 		ret = scsi_setup_blk_pc_cmnd(sdev, req);
> > 	return scsi_prep_return(q, req, ret);
> > 
> > It doesn't check to see if sdev is NULL, nor does 
> > scsi_setup_blk_pc_cmnd().  That accounts for this error:
> 
> I actually added a NULL check in scsi_setup_blk_pc_cmnd early on,
> but that just caused RCU CPU stalls afterwards and then eventually
> a hung system.

The RCU problem is likely to be a separate issue.  It might even be a 
result of the use-after-free problem with the elevator.

At any rate, it's clear that the crash in the refcounting log you
posted occurred because scsi_setup_blk_pc_cmnd() called
scsi_prep_state_check(), which tried to dereference the NULL pointer.

Would you like to try this patch to see if it fixes the problem?  As I 
said before, I'm not certain it's the best thing to do, but it worked 
on my system.

Alan Stern




Index: usb-3.0/drivers/scsi/scsi_lib.c
===================================================================
--- usb-3.0.orig/drivers/scsi/scsi_lib.c
+++ usb-3.0/drivers/scsi/scsi_lib.c
@@ -1247,6 +1247,8 @@ int scsi_prep_fn(struct request_queue *q
 	struct scsi_device *sdev = q->queuedata;
 	int ret = BLKPREP_KILL;
 
+	if (!sdev)
+		return ret;
 	if (req->cmd_type == REQ_TYPE_BLOCK_PC)
 		ret = scsi_setup_blk_pc_cmnd(sdev, req);
 	return scsi_prep_return(q, req, ret);
Index: usb-3.0/drivers/scsi/scsi_sysfs.c
===================================================================
--- usb-3.0.orig/drivers/scsi/scsi_sysfs.c
+++ usb-3.0/drivers/scsi/scsi_sysfs.c
@@ -322,6 +322,8 @@ static void scsi_device_dev_release_user
 		kfree(evt);
 	}
 
+	/* Freeing the queue signals to block that we're done */
+	scsi_free_queue(sdev->request_queue);
 	blk_put_queue(sdev->request_queue);
 	/* NULL queue means the device can't be used */
 	sdev->request_queue = NULL;
@@ -936,8 +938,6 @@ void __scsi_remove_device(struct scsi_de
 	/* cause the request function to reject all I/O requests */
 	sdev->request_queue->queuedata = NULL;
 
-	/* Freeing the queue signals to block that we're done */
-	scsi_free_queue(sdev->request_queue);
 	put_device(dev);
 }
 


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/
--- linux-3.0/scripts/kconfig/lxdialog/check-lxdialog.sh~	2011-07-22 04:17:23.000000000 +0200
+++ linux-3.0/scripts/kconfig/lxdialog/check-lxdialog.sh	2011-08-25 21:26:04.799150642 +0200
@@ -9,6 +9,12 @@
 			$cc -print-file-name=lib${lib}.${ext} | grep -q /
 			if [ $? -eq 0 ]; then
 				echo "-l${lib}"
+				for libt in tinfow tinfo ; do
+					$cc -print-file-name=lib${libt}.${ext} | grep -q /
+					if [ $? -eq 0 ]; then
+						echo "-l${libt}"
+					fi
+				done
 				exit
 			fi
 		done