kernel/drivers/misc/mei/client.c, 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: use mei_cl_is_connected consistently

2015-04-03T14:18:56Z

Replace open coded check for cl->state !=/== MEI_FILE_CONNECTED with mei_cl_is_connected function. Note that cl->state != MEI_FILE_CONNECTED is not the same as cl->state == MEI_FILE_DISCONNECTED Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: fix mei_poll operation

2015-04-03T14:18:56Z

mei_poll returned with POLLIN w/o checking whether the operation has really completed. remove redundant check and locking in amthif specific handler Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: free me client references on host init

2015-03-04T16:54:29Z

Fx fixes leak introduced by: commit b7d885145538 ("mei: revamp me clients list handling") 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: simplify io callback disposal

2015-03-02T03:37:00Z

Simplify disposal of io callback by removing the callback implicitly from its lookup list inside mei_io_cb_free Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: add mei_cl_alloc_linked function

2015-03-02T03:37:00Z

Add convenient wrapper mei_cl_alloc_linked to simplify error handling Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman

mei: always initialize the callback with the intended operation type

2015-03-02T03:37:00Z

We set the operation type at initialization time as each cb is used only for a single type of operation As a byproduct we add a convenient wrapper for allocating cb with the data buffer. 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 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