Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

What:		/sys/bus/scsi/drivers/st/debug_flag

Date:		October 2015

Kernel Version:	?.?

Contact:	shane.seymour@hpe.com

Description:

		This file allows you to turn debug output from the st driver

		off if you write a '0' to the file or on if you write a '1'.

		Note that debug output requires that the module be compiled

		with the #define DEBUG set to a non-zero value (this is the

		default). If DEBUG is set to 0 then this file will not

		appear in sysfs as its presence is conditional upon debug

		output support being compiled into the module.

* Qualcomm Technologies Inc Universal Flash Storage (UFS) PHY

UFSPHY nodes are defined to describe on-chip UFS PHY hardware macro.

Each UFS PHY node should have its own node.

To bind UFS PHY with UFS host controller, the controller node should

contain a phandle reference to UFS PHY node.

Required properties:

- compatible        : compatible list, contains "qcom,ufs-phy-qmp-20nm"

		      or "qcom,ufs-phy-qmp-14nm" according to the relevant phy in use.

- reg               : should contain PHY register address space (mandatory),

- reg-names         : indicates various resources passed to driver (via reg proptery) by name.

                      Required "reg-names" is "phy_mem".

- #phy-cells        : This property shall be set to 0

- vdda-phy-supply   : phandle to main PHY supply for analog domain

- vdda-pll-supply   : phandle to PHY PLL and Power-Gen block power supply

- clocks	    : List of phandle and clock specifier pairs

- clock-names       : List of clock input name strings sorted in the same

		      order as the clocks property. "ref_clk_src", "ref_clk",

		      "tx_iface_clk" & "rx_iface_clk" are mandatory but

		      "ref_clk_parent" is optional

Optional properties:

- vdda-phy-max-microamp : specifies max. load that can be drawn from phy supply

- vdda-pll-max-microamp : specifies max. load that can be drawn from pll supply

- vddp-ref-clk-supply   : phandle to UFS device ref_clk pad power supply

- vddp-ref-clk-max-microamp : specifies max. load that can be drawn from this supply

- vddp-ref-clk-always-on : specifies if this supply needs to be kept always on

Example:

	ufsphy1: ufsphy@0xfc597000 {

		compatible = "qcom,ufs-phy-qmp-20nm";

		reg = <0xfc597000 0x800>;

		reg-names = "phy_mem";

		#phy-cells = <0>;

		vdda-phy-supply = <&pma8084_l4>;

		vdda-pll-supply = <&pma8084_l12>;

		vdda-phy-max-microamp = <50000>;

		vdda-pll-max-microamp = <1000>;

		clock-names = "ref_clk_src",

			"ref_clk_parent",

			"ref_clk",

			"tx_iface_clk",

			"rx_iface_clk";

		clocks = <&clock_rpm clk_ln_bb_clk>,

			<&clock_gcc clk_pcie_1_phy_ldo >,

			<&clock_gcc clk_ufs_phy_ldo>,

			<&clock_gcc clk_gcc_ufs_tx_cfg_clk>,

			<&clock_gcc clk_gcc_ufs_rx_cfg_clk>;

	};

	ufshc@0xfc598000 {

		...

		phys = <&ufsphy1>;

		phy-names = "ufsphy";

	};

Each UFS controller instance should have its own node.

Required properties:

- compatible        : compatible list, contains "jedec,ufs-1.1"

- compatible		: must contain "jedec,ufs-1.1", may also list one or more

					  of the following:

					  "qcom,msm8994-ufshc"

					  "qcom,msm8996-ufshc"

					  "qcom,ufshc"

- interrupts        : <interrupt mapping for UFS host controller IRQ>

- reg               : <registers mapping>

Optional properties:

- phys                  : phandle to UFS PHY node

- phy-names             : the string "ufsphy" when is found in a node, along

                          with "phys" attribute, provides phandle to UFS PHY node

- vdd-hba-supply        : phandle to UFS host controller supply regulator node

- vcc-supply            : phandle to VCC supply regulator node

- vccq-supply           : phandle to VCCQ supply regulator node

		clocks = <&core 0>, <&ref 0>, <&iface 0>;

		clock-names = "core_clk", "ref_clk", "iface_clk";

		freq-table-hz = <100000000 200000000>, <0 0>, <0 0>;

		phys = <&ufsphy1>;

		phy-names = "ufsphy";

	};

with the kernel module parameter debug_flag defaulting to 0.  Debugging

can still be switched on and off with an ioctl.  To enable debug at

module load time add debug_flag=1 to the module load options, the

debugging output is not voluminous.

debugging output is not voluminous. Debugging can also be enabled

and disabled by writing a '0' (disable) or '1' (enable) to the sysfs

file /sys/bus/scsi/drivers/st/debug_flag.

If the tape seems to hang, I would be very interested to hear where

the driver is waiting. With the command 'ps -l' you can see the state

		 */

		shost->max_host_blocked = 1;

		if (scsi_init_shared_tag_map(shost, host->n_tags))

			goto err_add;

		rc = scsi_add_host_with_dma(ap->scsi_host,

						&ap->tdev, ap->host->dev);

		if (rc)