nick_c_huang | 3 May 10:04 2016

hi linux

hi linux

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nick_c_huang
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maryjanesogrub | 3 May 07:13 2016
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(Continue reading)

tom.ty89 | 2 May 22:13 2016
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[PATCH 3/3] libata-scsi: Do not partially report ATA read look-ahead

From: Tom Yan <tom.ty89 <at> gmail.com>

Nothing in the kernel actually makes use of the DRA bit in SCSI
MODE SENSE. Neither is there a sysfs file (like 'cache_type' for
WCE) that allows users to change the bit nor SCSI-ATA Translation
that can toggle the ATA feature.

Hence removing the MODE SENSE SCSI-ATA Translation that is only
triggered by the change of WCE to avoid silliness like this:
https://bugzilla.kernel.org/show_bug.cgi?id=105861#c2

Signed-off-by: Tom Yan <tom.ty89 <at> gmail.com>

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 0295c38..8c07db8 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
 <at>  <at>  -2316,8 +2316,6  <at>  <at>  static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
 	modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
 	if (changeable || ata_id_wcache_enabled(id))
 		buf[2] |= (1 << 2);	/* write cache enable */
-	if (!changeable && !ata_id_rahead_enabled(id))
-		buf[12] |= (1 << 5);	/* disable read ahead */
 	return sizeof(def_cache_mpage);
 }

--

-- 
2.8.2

--
(Continue reading)

tom.ty89 | 2 May 22:13 2016
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[PATCH 1/3] libata-scsi: Set CmdQue=1 when NCQ is enabled

From: Tom Yan <tom.ty89 <at> gmail.com>

https://bugzilla.kernel.org/show_bug.cgi?id=105931

This might look trivial at first sight. However, it can be
important to have the bit set accordingly when the device/SATL is
SCSI-passthrough'd to a virtual machine with scsi-block in qemu:

https://github.com/YanVugenfirer/kvm-guest-drivers-windows/issues/63#issuecomment-216199929
Signed-off-by: Tom Yan <tom.ty89 <at> gmail.com>

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 567859c..cd30f11 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
 <at>  <at>  -2007,7 +2007,10  <at>  <at>  static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
 		0,
 		0x5,	/* claim SPC-3 version compatibility */
 		2,
-		95 - 4
+		95 - 4,
+		0,
+		0,
+		0
 	};

 	VPRINTK("ENTER\n");
 <at>  <at>  -2024,6 +2027,9  <at>  <at>  static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
 		hdr[2] = 0x6; /* ZBC is defined in SPC-4 */
 	}
(Continue reading)

Alexey Khoroshilov | 30 Apr 00:11 2016
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Gravatar

[PATCH] ide-tape: fix misprint in failure handling in idetape_init()

If driver_register() failed there is no sense to call driver_unregister().
unregister_chrdev() should be called here.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov <at> ispras.ru>
---
 drivers/ide/ide-tape.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index 12fa04997dcc..9ecf4e35adcd 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
 <at>  <at>  -2052,12 +2052,12  <at>  <at>  static int __init idetape_init(void)

 	error = driver_register(&idetape_driver.gen_driver);
 	if (error)
-		goto out_free_driver;
+		goto out_free_chrdev;

 	return 0;

-out_free_driver:
-	driver_unregister(&idetape_driver.gen_driver);
+out_free_chrdev:
+	unregister_chrdev(IDETAPE_MAJOR, "ht");
 out_free_class:
 	class_destroy(idetape_sysfs_class);
 out:
(Continue reading)

Melissa Robert | 22 Apr 19:47 2016
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Andy Falanga (afalanga | 19 Apr 02:33 2016

What happened to ....

I'm rebuilding a driver I've written for AHCI on RHEL7.  It built well 
on 7.0 and 7.1.  However, on 7.2 I get these:

WARNING: "ahci_hw_interrupt" [/devel/vmshare/dm3-ahci/dm_ahci/ahci.ko] 
undefined!
WARNING: "ahci_interrupt" [/devel/vmshare/dm3-ahci/dm_ahci/ahci.ko] 
undefined!
WARNING: "ahci_thread_fn" [/devel/vmshare/dm3-ahci/dm_ahci/ahci.ko] 
undefined!


Indeed, inspecing /proc/kallsyms shows they're not there.  So, what 
happened to them?  I'm searching through the archives of this list now, 
but all I've uncovered are a couple of threads mentioning that there is 
a possibility one could crash the system if the port isn't real.

What should be used in their place?

Andy
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andreas11 | 18 Apr 19:43 2016

Greetings!!!

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you as you're a foreigner, it will be mutually beneficial to both. If you’re interested, urgently, get
back to me for more explanation about the deal.
Regards
Eric
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Dan Carpenter | 14 Apr 11:30 2016
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re: libata: check zero power ready status for ZPODD

Hello Aaron Lu,

The patch 3dc67440d99b: "libata: check zero power ready status for
ZPODD" from Jan 15, 2013, leads to the following static checker
warning:

	drivers/ata/libata-zpodd.c:97 zpready()
	error: uninitialized symbol 'sense_key'.

drivers/ata/libata-zpodd.c
    88  /* Test if ODD is zero power ready by sense code */
    89  static bool zpready(struct ata_device *dev)
    90  {
    91          u8 sense_key, *sense_buf;
    92          unsigned int ret, asc, ascq, add_len;
    93          struct zpodd *zpodd = dev->zpodd;
    94  
    95          ret = atapi_eh_tur(dev, &sense_key);
    96  
    97          if (!ret || sense_key != NOT_READY)
    98                  return false;

It's not clear what is going on here.  atapi_eh_tur() returns 0 on
success or a bit mask on error.  If the AC_ERR_DEV (which is BIT(0)) bit
is set and no other bits then we set "&sense_key" otherwise it is
uninitialized.

So maybe the test should be:

	if (ret != AC_ERR_DEV || sense_key != NOT_READY)
(Continue reading)

Hannes Reinecke | 12 Apr 08:47 2016
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[PATCHv2 00/14] ZAC support

Hi all,

here's a patchset implementing ZAC support for libata.

This is the second part of a larger patchset for ZAC/ZBC support;
it requires the scsi trace fixes queued for in mkp/4.7/scsi-queue and
the patchset 'libata: SATL update' I've posted earlier.
The full patchset can be found at:

git.kernel.org/hare/scsi-devel/h/zbc.v5

As usual, comments and reviews are welcome.

Changes to v1:
- Include reviews from upstream
- Add NCQ encapsulation for ZAC MANAGEMENT commands
- Update libata-trace to decode ZAC MANAGEMENT commands
- Minor fixes accumulated during testing

Hannes Reinecke (14):
  libata: do not attempt to retrieve sense code twice
  libsas: enable FPDMA SEND/RECEIVE
  libsas: Define ATA_CMD_NCQ_NON_DATA
  libata: Separate out ata_dev_config_ncq_send_recv()
  libata: NCQ Encapsulation for READ LOG DMA EXT
  libata: Check log page directory before accessing pages
  libata-trace: decode subcommands
  libata-scsi: Generate sense code for disabled devices
  libata: fixup ZAC device disabling
  libata: implement ZBC IN translation
(Continue reading)


Gmane