Date:	Sat, 4 Oct 2008 18:27:03 +0200
From:	Stefan Lippers-Hollmann <s.L-H@....de>
To:	linux-kernel@...r.kernel.org
Cc:	tj@...nel.org, gregkh@...e.de, jgarzik@...hat.com,
	pchen@...dia.com, stable@...nel.org
Subject: Re: patch sata_nv-disable-hardreset-for-generic.patch added to 2.6.26-stable tree

Hi

On Donnerstag, 2. Oktober 2008, gregkh@...e.de wrote:
> 
> This is a note to let you know that we have just queued up the patch titled
> 
>     Subject: sata_nv: disable hardreset for generic
> 
> to the 2.6.26-stable tree.  Its filename is
> 
>     sata_nv-disable-hardreset-for-generic.patch
> 
> A git repo of this tree can be found at 
>     http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
> 
> 
> From 2fd673ecf0378ddeeeb87b3605e50212e0c0ddc6 Mon Sep 17 00:00:00 2001
> From: Tejun Heo <tj@...nel.org>
> Date: Fri, 29 Aug 2008 16:13:12 +0200
> Subject: sata_nv: disable hardreset for generic
> 
> From: Tejun Heo <tj@...nel.org>
> 
> commit 2fd673ecf0378ddeeeb87b3605e50212e0c0ddc6 upstream
> 
> of them being unifying probing, hotplug and EH reset paths uniform.
> Previously, broken hardreset could go unnoticed as it wasn't used
> during probing but when something goes wrong or after hotplug the
> problem will surface and bite hard.
> 
> OSDL bug 11195 reports that sata_nv generic flavor falls into this
> category.  Hardreset itself succeeds but PHY stays offline after
> hardreset.  I tried longer debounce timing but the result was the
> same.
> 
>   http://bugzilla.kernel.org/show_bug.cgi?id=11195
> 
> So, it seems we'll have to drop hardreset from the generic flavor.
> 
> Signed-off-by: Tejun Heo <tj@...nel.org>
> Cc: Peer Chen <pchen@...dia.com>
> Signed-off-by: Jeff Garzik <jgarzik@...hat.com>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

On 2.6.26.5 + the pending stable queue applied, this patch results in lots 
of noise in my syslog (full gzipped dmesg with and without this patch 
attached):

ata4: EH complete
ata5: EH pending after 5 tries, giving up
ata5: EH complete
ata6: EH pending after 5 tries, giving up
ata6: EH complete
ata5: EH pending after 5 tries, giving up
ata5: EH complete
ata6: EH pending after 5 tries, giving up
ata6: EH complete

reverting just this patch fixes the issue again.

This triggers reproducably for me on different nforce3 and nforce4 systems 
running a 64 bit kernel:

nforce3:
00:00.0 Host bridge [0600]: nVidia Corporation nForce3 250Gb Host Bridge [10de:00e1] (rev a1)
00:01.0 ISA bridge [0601]: nVidia Corporation nForce3 250Gb LPC Bridge [10de:00e0] (rev a2)
00:01.1 SMBus [0c05]: nVidia Corporation nForce 250Gb PCI System Management [10de:00e4] (rev a1)
00:02.0 USB Controller [0c03]: nVidia Corporation CK8S USB Controller [10de:00e7] (rev a1)
00:02.1 USB Controller [0c03]: nVidia Corporation CK8S USB Controller [10de:00e7] (rev a1)
00:02.2 USB Controller [0c03]: nVidia Corporation nForce3 EHCI USB 2.0 Controller [10de:00e8] (rev a2)
00:05.0 Bridge [0680]: nVidia Corporation CK8S Ethernet Controller [10de:00df] (rev a2)
00:06.0 Multimedia audio controller [0401]: nVidia Corporation nForce3 250Gb AC'97 Audio Controller [10de:00ea] (rev a1)
00:08.0 IDE interface [0101]: nVidia Corporation CK8S Parallel ATA Controller (v2.5) [10de:00e5] (rev a2)
00:09.0 IDE interface [0101]: nVidia Corporation nForce3 Serial ATA Controller 2 [10de:00ee] (rev a2)
00:0a.0 IDE interface [0101]: nVidia Corporation nForce3 Serial ATA Controller [10de:00e3] (rev a2)
00:0b.0 PCI bridge [0604]: nVidia Corporation nForce3 250Gb AGP Host to PCI Bridge [10de:00e2] (rev a2)
00:0e.0 PCI bridge [0604]: nVidia Corporation nForce3 250Gb PCI-to-PCI Bridge [10de:00ed] (rev a2)
00:18.0 Host bridge [0600]: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration [1022:1100]
00:18.1 Host bridge [0600]: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map [1022:1101]
00:18.2 Host bridge [0600]: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller [1022:1102]
00:18.3 Host bridge [0600]: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control [1022:1103]
01:00.0 VGA compatible controller [0300]: ATI Technologies Inc RV280 [Radeon 9200 PRO] [1002:5960] (rev 01)
01:00.1 Display controller [0380]: ATI Technologies Inc RV280 [Radeon 9200 PRO] (Secondary) [1002:5940] (rev 01)
02:0a.0 Multimedia controller [0480]: Philips Semiconductors TriMedia TM-1300 [1131:5402] (rev 82)
02:0c.0 FireWire (IEEE 1394) [0c00]: VIA Technologies, Inc. VT6306 Fire II IEEE 1394 OHCI Link Layer Controller [1106:3044] (rev 46)
02:0d.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL-8169 Gigabit Ethernet [10ec:8169] (rev 10)

nforce4:
00:00.0 Memory controller [0580]: nVidia Corporation CK804 Memory Controller [10de:005e] (rev a3)
00:01.0 ISA bridge [0601]: nVidia Corporation CK804 ISA Bridge [10de:0050] (rev a3)
00:01.1 SMBus [0c05]: nVidia Corporation CK804 SMBus [10de:0052] (rev a2)
00:02.0 USB Controller [0c03]: nVidia Corporation CK804 USB Controller [10de:005a] (rev a2)
00:02.1 USB Controller [0c03]: nVidia Corporation CK804 USB Controller [10de:005b] (rev a3)
00:04.0 Multimedia audio controller [0401]: nVidia Corporation CK804 AC'97 Audio Controller [10de:0059] (rev a2)
00:06.0 IDE interface [0101]: nVidia Corporation CK804 IDE [10de:0053] (rev f2)
00:07.0 IDE interface [0101]: nVidia Corporation CK804 Serial ATA Controller [10de:0054] (rev f3)
00:08.0 IDE interface [0101]: nVidia Corporation CK804 Serial ATA Controller [10de:0055] (rev f3)
00:09.0 PCI bridge [0604]: nVidia Corporation CK804 PCI Bridge [10de:005c] (rev a2)
00:0a.0 Bridge [0680]: nVidia Corporation CK804 Ethernet Controller [10de:0057] (rev a3)
00:0b.0 PCI bridge [0604]: nVidia Corporation CK804 PCIE Bridge [10de:005d] (rev a3)
00:0c.0 PCI bridge [0604]: nVidia Corporation CK804 PCIE Bridge [10de:005d] (rev a3)
00:0d.0 PCI bridge [0604]: nVidia Corporation CK804 PCIE Bridge [10de:005d] (rev a3)
00:0e.0 PCI bridge [0604]: nVidia Corporation CK804 PCIE Bridge [10de:005d] (rev a3)
00:18.0 Host bridge [0600]: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration [1022:1100]
00:18.1 Host bridge [0600]: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map [1022:1101]
00:18.2 Host bridge [0600]: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller [1022:1102]
00:18.3 Host bridge [0600]: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control [1022:1103]
01:06.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL-8185 IEEE 802.11a/b/g Wireless LAN Controller [10ec:8185] (rev 20)
01:07.0 Ethernet controller [0200]: Intel Corporation 82541GI Gigabit Ethernet Controller [8086:1076]
01:0c.0 FireWire (IEEE 1394) [0c00]: VIA Technologies, Inc. VT6306 Fire II IEEE 1394 OHCI Link Layer Controller [1106:3044] (rev 80)
05:00.0 VGA compatible controller [0300]: ATI Technologies Inc RV370 5B60 [Radeon X300 (PCIE)] [1002:5b60]
05:00.1 Display controller [0380]: ATI Technologies Inc RV370 [Radeon X300SE] [1002:5b70]

and 

nforce4
00:00.0 Memory controller [0580]: nVidia Corporation CK804 Memory Controller [10de:005e] (rev a3)
00:01.0 ISA bridge [0601]: nVidia Corporation CK804 ISA Bridge [10de:0050] (rev a3)
00:01.1 SMBus [0c05]: nVidia Corporation CK804 SMBus [10de:0052] (rev a2)
00:02.0 USB Controller [0c03]: nVidia Corporation CK804 USB Controller [10de:005a] (rev a2)
00:02.1 USB Controller [0c03]: nVidia Corporation CK804 USB Controller [10de:005b] (rev a3)
00:04.0 Multimedia audio controller [0401]: nVidia Corporation CK804 AC'97 Audio Controller [10de:0059] (rev a2)
00:06.0 IDE interface [0101]: nVidia Corporation CK804 IDE [10de:0053] (rev f2)
00:07.0 IDE interface [0101]: nVidia Corporation CK804 Serial ATA Controller [10de:0054] (rev f3)
00:08.0 IDE interface [0101]: nVidia Corporation CK804 Serial ATA Controller [10de:0055] (rev f3)
00:09.0 PCI bridge [0604]: nVidia Corporation CK804 PCI Bridge [10de:005c] (rev a2)
00:0a.0 Bridge [0680]: nVidia Corporation CK804 Ethernet Controller [10de:0057] (rev a3)
00:0b.0 PCI bridge [0604]: nVidia Corporation CK804 PCIE Bridge [10de:005d] (rev a3)
00:0c.0 PCI bridge [0604]: nVidia Corporation CK804 PCIE Bridge [10de:005d] (rev a3)
00:0d.0 PCI bridge [0604]: nVidia Corporation CK804 PCIE Bridge [10de:005d] (rev a3)
00:0e.0 PCI bridge [0604]: nVidia Corporation CK804 PCIE Bridge [10de:005d] (rev a3)
00:18.0 Host bridge [0600]: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration [1022:1100]
00:18.1 Host bridge [0600]: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map [1022:1101]
00:18.2 Host bridge [0600]: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller [1022:1102]
00:18.3 Host bridge [0600]: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control [1022:1103]
01:07.0 Multimedia video controller [0400]: Conexant CX23880/1/2/3 PCI Video and Audio Decoder [14f1:8800] (rev 05)
01:07.1 Multimedia controller [0480]: Conexant CX23880/1/2/3 PCI Video and Audio Decoder [Audio Port] [14f1:8801] (rev 05)
01:07.2 Multimedia controller [0480]: Conexant CX23880/1/2/3 PCI Video and Audio Decoder [MPEG Port] [14f1:8802] (rev 05)
01:07.4 Multimedia controller [0480]: Conexant CX23880/1/2/3 PCI Video and Audio Decoder [IR Port] [14f1:8804] (rev 05)
01:08.0 Network controller [0280]: Techsan Electronics Co Ltd B2C2 FlexCopII DVB chip / Technisat SkyStar2 DVB card [13d0:2103] (rev 02)
01:0a.0 FireWire (IEEE 1394) [0c00]: Texas Instruments TSB82AA2 IEEE-1394b Link Layer Controller [104c:8025] (rev 01)
02:00.0 Ethernet controller [0200]: Marvell Technology Group Ltd. 88E8053 PCI-E Gigabit Ethernet Controller [11ab:4362] (rev 19)
05:00.0 VGA compatible controller [0300]: ATI Technologies Inc RV370 5B60 [Radeon X300 (PCIE)] [1002:5b60]
05:00.1 Display controller [0380]: ATI Technologies Inc RV370 [Radeon X300SE] [1002:5b70]

Regards
	Stefan Lippers-Hollmann

> ---
>  drivers/ata/sata_nv.c |   19 +------------------
>  1 file changed, 1 insertion(+), 18 deletions(-)
> 
> --- a/drivers/ata/sata_nv.c
> +++ b/drivers/ata/sata_nv.c
> @@ -309,8 +309,6 @@ static void nv_nf2_freeze(struct ata_por
>  static void nv_nf2_thaw(struct ata_port *ap);
>  static void nv_ck804_freeze(struct ata_port *ap);
>  static void nv_ck804_thaw(struct ata_port *ap);
> -static int nv_hardreset(struct ata_link *link, unsigned int *class,
> -			unsigned long deadline);
>  static int nv_adma_slave_config(struct scsi_device *sdev);
>  static int nv_adma_check_atapi_dma(struct ata_queued_cmd *qc);
>  static void nv_adma_qc_prep(struct ata_queued_cmd *qc);
> @@ -407,7 +405,7 @@ static struct scsi_host_template nv_swnc
>  
>  static struct ata_port_operations nv_generic_ops = {
>  	.inherits		= &ata_bmdma_port_ops,
> -	.hardreset		= nv_hardreset,
> +	.hardreset		= ATA_OP_NULL,
>  	.scr_read		= nv_scr_read,
>  	.scr_write		= nv_scr_write,
>  };
> @@ -1588,21 +1586,6 @@ static void nv_mcp55_thaw(struct ata_por
>  	ata_sff_thaw(ap);
>  }
>  
> -static int nv_hardreset(struct ata_link *link, unsigned int *class,
> -			unsigned long deadline)
> -{
> -	int rc;
> -
> -	/* SATA hardreset fails to retrieve proper device signature on
> -	 * some controllers.  Request follow up SRST.  For more info,
> -	 * see http://bugzilla.kernel.org/show_bug.cgi?id=3352
> -	 */
> -	rc = sata_sff_hardreset(link, class, deadline);
> -	if (rc)
> -		return rc;
> -	return -EAGAIN;
> -}
> -
>  static void nv_adma_error_handler(struct ata_port *ap)
>  {
>  	struct nv_adma_port_priv *pp = ap->private_data;
> 
> 
> Patches currently in stable-queue which might be from tj@...nel.org are
> 
> queue-2.6.26/sata_nv-disable-hardreset-for-generic.patch

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