kernel/drivers/misc/mei/mei_dev.h, branch linux-4.1.y

mei: me: wait for power gating exit confirmation

2015-07-21T17:10:03Z

commit 3dc196eae1db548f05e53e5875ff87b8ff79f249 upstream. Fix the hbm power gating state machine so it will wait till it receives confirmation interrupt for the PG_ISOLATION_EXIT message. In process of the suspend flow the devices first have to exit from the power gating state (runtime pm resume). If we do not handle the confirmation interrupt after sending PG_ISOLATION_EXIT message, we may receive it already after the suspend flow has changed the device state and interrupt will be interpreted as a spurious event, consequently link reset will be invoked which will prevent the device from completing the suspend flow kernel: [6603] mei_reset:136: mei_me 0000:00:16.0: powering down: end of reset kernel: [476] mei_me_irq_thread_handler:643: mei_me 0000:00:16.0: function called after ISR to handle the interrupt processing. kernel: mei_me 0000:00:16.0: FW not ready: resetting Cc: Gabriele Mazzotta Link: https://bugzilla.kernel.org/show_bug.cgi?id=86241 Link: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=770397 Tested-by: Gabriele Mazzotta Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: allow read concurrency

2015-03-02T03:37:00Z

Replace clunky read state machine with read stack implemented as per client read list, this is important mostly for mei drivers with unsolicited reads Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: use only one buffer in callback

2015-03-02T03:37:00Z

The callback structure is used exclusively for reading or writing therefore there is no reason to hold both response and request buffers in the callback structure Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: iamthif: use regular client read functions

2015-03-02T03:37:00Z

Reduce code duplication in amthif by reusing regular client read functions. The change also removes the need for amthif own buffering Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: iamthif: use client write functions

2015-03-02T03:37:00Z

Reduce code duplication in amthif code by reusing regular client write functions. Add completed flag to cb so amthif client can add rx credits on write completion Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: iamthif: send flow control as a regular client

2015-03-02T03:37:00Z

Reuse common client mechanism for sending flow control hbm message. Add new function mei_amthif_read_start similar to mei_cl_read_start that puts control flow request onto the control write queue and drop mei_amthif_irq_read function Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: iamthif: remove useless iamthif_ioctl variable

2015-03-02T03:37:00Z

iamthif_ioctl is obsolete and can be safely dropped Currently it is set to true during driver runtime Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: iamthif: fix device reset on mei_amthif_irq_read_msg

2015-03-02T03:37:00Z

On failure mei_amthif_irq_read_msg returns an error that will cause device reset but the issue is software one so instead we should propagate error to caller and just clean the read queues. As a side effect also removes useless BUG_ONs Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: fix device reset on mei_cl_irq_read_msg allocation failure

2015-03-02T03:36:59Z

On memory allocation failure mei_cl_irq_read_msg will return with error that will cause device reset. Instead we should propagate error to caller and just clean the read queues. Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: revamp me clients list handling

2015-03-02T03:36:59Z

1. Use rw lock to access the me_clients list 2. Reuse already defined find functions also when removing particular me client 3. Add wrappers for addition and deletion Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman