4.9-stable patches

added patches:
	ata-libata-transport-fix-dma-pio-xfer-_mode-sysfs-files.patch

diff --git a/queue-4.9/ata-libata-transport-fix-dma-pio-xfer-_mode-sysfs-files.patch b/queue-4.9/ata-libata-transport-fix-dma-pio-xfer-_mode-sysfs-files.patch
new file mode 100644 (file)
index 0000000..eb82410
--- /dev/null
+++ b/queue-4.9/ata-libata-transport-fix-dma-pio-xfer-_mode-sysfs-files.patch
@@ -0,0 +1,75 @@
+From 72aad489f992871e908ff6d9055b26c6366fb864 Mon Sep 17 00:00:00 2001
+From: Sergey Shtylyov <s.shtylyov@omp.ru>
+Date: Wed, 8 Jun 2022 22:51:07 +0300
+Subject: ata: libata-transport: fix {dma|pio|xfer}_mode sysfs files
+
+From: Sergey Shtylyov <s.shtylyov@omp.ru>
+
+commit 72aad489f992871e908ff6d9055b26c6366fb864 upstream.
+
+The {dma|pio}_mode sysfs files are incorrectly documented as having a
+list of the supported DMA/PIO transfer modes, while the corresponding
+fields of the *struct* ata_device hold the transfer mode IDs, not masks.
+
+To match these docs, the {dma|pio}_mode (and even xfer_mode!) sysfs
+files are handled by the ata_bitfield_name_match() macro which leads to
+reading such kind of nonsense from them:
+
+$ cat /sys/class/ata_device/dev3.0/pio_mode
+XFER_UDMA_7, XFER_UDMA_6, XFER_UDMA_5, XFER_UDMA_4, XFER_MW_DMA_4,
+XFER_PIO_6, XFER_PIO_5, XFER_PIO_4, XFER_PIO_3, XFER_PIO_2, XFER_PIO_1,
+XFER_PIO_0
+
+Using the correct ata_bitfield_name_search() macro fixes that:
+
+$ cat /sys/class/ata_device/dev3.0/pio_mode
+XFER_PIO_4
+
+While fixing the file documentation, somewhat reword the {dma|pio}_mode
+file doc and add a note about being mostly useful for PATA devices to
+the xfer_mode file doc...
+
+Fixes: d9027470b886 ("[libata] Add ATA transport class")
+Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
+Cc: stable@vger.kernel.org
+Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ Documentation/ABI/testing/sysfs-ata |    5 +++--
+ drivers/ata/libata-transport.c      |    2 +-
+ 2 files changed, 4 insertions(+), 3 deletions(-)
+
+--- a/Documentation/ABI/testing/sysfs-ata
++++ b/Documentation/ABI/testing/sysfs-ata
+@@ -59,17 +59,18 @@ class
+ 
+ dma_mode
+ 
+-      Transfer modes supported by the device when in DMA mode.
++      DMA transfer mode used by the device.
+       Mostly used by PATA device.
+ 
+ pio_mode
+ 
+-      Transfer modes supported by the device when in PIO mode.
++      PIO transfer mode used by the device.
+       Mostly used by PATA device.
+ 
+ xfer_mode
+ 
+       Current transfer mode.
++      Mostly used by PATA device.
+ 
+ id
+ 
+--- a/drivers/ata/libata-transport.c
++++ b/drivers/ata/libata-transport.c
+@@ -196,7 +196,7 @@ static struct {
+       { XFER_PIO_0,                   "XFER_PIO_0" },
+       { XFER_PIO_SLOW,                "XFER_PIO_SLOW" }
+ };
+-ata_bitfield_name_match(xfer,ata_xfer_names)
++ata_bitfield_name_search(xfer, ata_xfer_names)
+ 
+ /*
+  * ATA Port attributes

diff --git a/queue-4.9/series b/queue-4.9/series
index 51a2aea6051fcde019b1649fff7b322e2ce12a07..9c82f302b9af3fec3b55bc5cd48ba89667befb4f 100644 (file)
--- a/queue-4.9/series
+++ b/queue-4.9/series
@@ -158,3 +158,4 @@ nodemask-fix-return-values-to-be-unsigned.patch
 vringh-fix-loop-descriptors-check-in-the-indirect-ca.patch
 alsa-hda-conexant-fix-loopback-issue-with-cx20632.patch
 cifs-return-errors-during-session-setup-during-reconnects.patch
+ata-libata-transport-fix-dma-pio-xfer-_mode-sysfs-files.patch