Re: Constant ata messages on console with commit 28361c403683 ("libata: add extra internal command") (was Re: [GIT PULL 2/2] libata changes for v4.18-rc1)

[Jens Axboe]

On 6/19/18 1:29 AM, Michael Ellerman wrote:
> Jens Axboe <axboe@xxxxxxxxx> writes:
>> On 6/18/18 1:33 AM, Michael Ellerman wrote:
>>> Tejun Heo <tj@xxxxxxxxxx> writes:
>>> ...
>>>> Jens Axboe (10):
>>>>       libata: introduce notion of separate hardware tags
>>>>       libata: convert core and drivers to ->hw_tag usage
>>>>       libata: bump ->qc_active to a 64-bit type
>>>>       libata: use ata_tag_internal() consistently
>>>>       libata: remove assumption that ATA_MAX_QUEUE - 1 is the max
>>>>       sata_nv: set host can_queue count appropriately
>>>>       libata: add extra internal command
>>>
>>> Replying here because I can't find the original mail.
>>>
>>> The above commit is causing one of my machines to constantly spew ata
>>> messages on the console, according to bisect:
>>>
>>> # first bad commit: [28361c403683c2b00d4f5e76045f3ccd299bf99d] libata: add extra internal command
>>>
>>> To get it to boot I have to also apply:
>>>
>>>   88e10092f6a6 ("sata_fsl: use the right type for tag bitshift")
>>>
>>>
>>> The system boots OK and seems fine, except that it's just printing
>>> multiple of these per second:
>>>
>>>   ata2: Signature Update detected @ 0 msecs
>>>   ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
>>>   ata2.00: configured for UDMA/100
>>>   ata2: Signature Update detected @ 0 msecs
>>>   ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
>>>   ata2.00: configured for UDMA/100
>>>   ata2: Signature Update detected @ 0 msecs
>>>   ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
>>>   ata2.00: configured for UDMA/100
>>>   ata2: Signature Update detected @ 0 msecs
>>>   ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
>>>   ata2.00: configured for UDMA/100
>>>   ata2: Signature Update detected @ 0 msecs
>>>
>>> And it never seems to stop.
>>>
>>> The machine is a Freescale/NXP P5020ds, using the sata_fsl driver
>>> presumably. Any ideas?
>>
>> Hmm that's odd. Can you include the boot log from a working boot as
>> well? Would be nice to see what devices are on the sata adapter.
>> The above just looks like a hardreset loop.
> 
> Ah yep. I stupidly assumed it was working, because the machine booted,
> but that's because the root disk is on ata1.
> 
> Booting the good kernel:
> 
>   ba80c3a572f4 ("sata_nv: set host can_queue count appropriately")
> 
> I see:
> 
>   root@p5020ds:~# ls -l /sys/class/ata_port/
>   total 0
>   lrwxrwxrwx 1 root root 0 Jun 19 06:49 ata1 -> ../../devices/platform/ffe000000.soc/ffe220000.sata/ata1/ata_port/ata1
>   lrwxrwxrwx 1 root root 0 Jun 19 17:06 ata2 -> ../../devices/platform/ffe000000.soc/ffe221000.sata/ata2/ata_port/ata2
> 
>   root@p5020ds:~# ls -l /sys/class/block/ | grep ata
>   lrwxrwxrwx 1 root root 0 Jun 19 17:11 sda -> ../../devices/platform/ffe000000.soc/ffe220000.sata/ata1/host0/target0:0:0/0:0:0:0/block/sda
>   lrwxrwxrwx 1 root root 0 Jun 19 17:11 sda1 -> ../../devices/platform/ffe000000.soc/ffe220000.sata/ata1/host0/target0:0:0/0:0:0:0/block/sda/sda1
>   lrwxrwxrwx 1 root root 0 Jun 19 17:11 sda2 -> ../../devices/platform/ffe000000.soc/ffe220000.sata/ata1/host0/target0:0:0/0:0:0:0/block/sda/sda2
>   lrwxrwxrwx 1 root root 0 Jun 19 17:11 sda5 -> ../../devices/platform/ffe000000.soc/ffe220000.sata/ata1/host0/target0:0:0/0:0:0:0/block/sda/sda5
>   lrwxrwxrwx 1 root root 0 Jun 19 17:11 sr0 -> ../../devices/platform/ffe000000.soc/ffe221000.sata/ata2/host1/target1:0:0/1:0:0:0/block/sr0
> 
> So it's the DVD drive.
> 
>   root@p5020ds:/sys/devices/platform/ffe000000.soc/ffe221000.sata/ata2/host1/target1:0:0/1:0:0:0/scsi_device/1:0:0:0/device# cat vendor 
>   Optiarc 
>   root@p5020ds:/sys/devices/platform/ffe000000.soc/ffe221000.sata/ata2/host1/target1:0:0/1:0:0:0/scsi_device/1:0:0:0/device# cat model
>   DVD RW AD-7260S 
> 
> 
> Full boot log from a good boot attached if that's helpful.
> 
> All of the above looks the same when I boot with the broken setup, it
> just spams dmesg constantly.
> 
> One thing that is different, on the good kernel I see:
> 
>   root@p5020ds:~# mount /dev/sr0 /mnt
>   mount: no medium found on /dev/sr0
> 
> vs bad (88e10092f6a6):
> 
>   root@p5020ds:~# mount /dev/sr0 /mnt
>   mount: /dev/sr0 is already mounted or /mnt busy

Can you try the below patch, on both 4.17 and on current -git? Might
help shed some light on this. The fsl driver does weird stuff with
the internal tag, I'm guessing that's related.


diff --git a/drivers/ata/sata_fsl.c b/drivers/ata/sata_fsl.c
index b8d9cfc60374..9bac5ba36dac 100644
--- a/drivers/ata/sata_fsl.c
+++ b/drivers/ata/sata_fsl.c
@@ -28,6 +28,9 @@
 #include <linux/of_irq.h>
 #include <linux/of_platform.h>
 
+#undef DPRINTK
+#define DPRINTK printk
+
 static unsigned int intr_coalescing_count;
 module_param(intr_coalescing_count, int, S_IRUGO);
 MODULE_PARM_DESC(intr_coalescing_count,
@@ -318,7 +321,7 @@ static void fsl_sata_set_irq_coalescing(struct ata_host *host,
 
 	DPRINTK("interrupt coalescing, count = 0x%x, ticks = %x\n",
 			intr_coalescing_count, intr_coalescing_ticks);
-	DPRINTK("ICC register status: (hcr base: 0x%x) = 0x%x\n",
+	DPRINTK("ICC register status: (hcr base: 0x%p) = 0x%x\n",
 			hcr_base, ioread32(hcr_base + ICC));
 }
 
@@ -1479,7 +1482,7 @@ static int sata_fsl_probe(struct platform_device *ofdev)
 	}
 
 	DPRINTK("@reset i/o = 0x%x\n", ioread32(csr_base + TRANSCFG));
-	DPRINTK("sizeof(cmd_desc) = %d\n", sizeof(struct command_desc));
+	DPRINTK("sizeof(cmd_desc) = %d\n", (int) sizeof(struct command_desc));
 	DPRINTK("sizeof(#define cmd_desc) = %d\n", SATA_FSL_CMD_DESC_SIZE);
 
 	host_priv = kzalloc(sizeof(struct sata_fsl_host_priv), GFP_KERNEL);

-- 
Jens Axboe