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Message-Id: <20140114155104.0ab2772aaa909e49bc89cd61@canb.auug.org.au>
Date: Tue, 14 Jan 2014 15:51:04 +1100
From: Stephen Rothwell <sfr@...b.auug.org.au>
To: Andrew Morton <akpm@...ux-foundation.org>,
Greg KH <greg@...ah.com>, Arnd Bergmann <arnd@...db.de>
Cc: linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
Ian Munsie <imunsie@....ibm.com>,
Tomas Winkler <tomas.winkler@...el.com>
Subject: linux-next: manual merge of the akpm-current tree with the
char-misc tree
Hi Andrew,
Today's linux-next merge of the akpm-current tree got a conflict in
drivers/misc/mei/init.c between commit 33ec08263147 ("mei: revamp mei
reset state machine") from the char-misc tree and commit dd045dab2999
("drivers/misc/mei: ratelimit several error messages") from the
akpm-current tree.
I fixed it up (see below) and can carry the fix as necessary (no action
is required).
--
Cheers,
Stephen Rothwell sfr@...b.auug.org.au
diff --cc drivers/misc/mei/init.c
index cdd31c2a2a2b,edd3bb6a5df9..000000000000
--- a/drivers/misc/mei/init.c
+++ b/drivers/misc/mei/init.c
@@@ -43,119 -43,41 +43,119 @@@ const char *mei_dev_state_str(int state
#undef MEI_DEV_STATE
}
-void mei_device_init(struct mei_device *dev)
-{
- /* setup our list array */
- INIT_LIST_HEAD(&dev->file_list);
- INIT_LIST_HEAD(&dev->device_list);
- mutex_init(&dev->device_lock);
- init_waitqueue_head(&dev->wait_hw_ready);
- init_waitqueue_head(&dev->wait_recvd_msg);
- init_waitqueue_head(&dev->wait_stop_wd);
- dev->dev_state = MEI_DEV_INITIALIZING;
- mei_io_list_init(&dev->read_list);
- mei_io_list_init(&dev->write_list);
- mei_io_list_init(&dev->write_waiting_list);
- mei_io_list_init(&dev->ctrl_wr_list);
- mei_io_list_init(&dev->ctrl_rd_list);
+/**
+ * mei_cancel_work. Cancel mei background jobs
+ *
+ * @dev: the device structure
+ *
+ * returns 0 on success or < 0 if the reset hasn't succeeded
+ */
+void mei_cancel_work(struct mei_device *dev)
+{
+ cancel_work_sync(&dev->init_work);
+ cancel_work_sync(&dev->reset_work);
- INIT_DELAYED_WORK(&dev->timer_work, mei_timer);
- INIT_WORK(&dev->init_work, mei_host_client_init);
+ cancel_delayed_work(&dev->timer_work);
+}
+EXPORT_SYMBOL_GPL(mei_cancel_work);
- INIT_LIST_HEAD(&dev->wd_cl.link);
- INIT_LIST_HEAD(&dev->iamthif_cl.link);
- mei_io_list_init(&dev->amthif_cmd_list);
- mei_io_list_init(&dev->amthif_rd_complete_list);
+/**
+ * mei_reset - resets host and fw.
+ *
+ * @dev: the device structure
+ */
+int mei_reset(struct mei_device *dev)
+{
+ enum mei_dev_state state = dev->dev_state;
+ bool interrupts_enabled;
+ int ret;
- bitmap_zero(dev->host_clients_map, MEI_CLIENTS_MAX);
- dev->open_handle_count = 0;
+ if (state != MEI_DEV_INITIALIZING &&
+ state != MEI_DEV_DISABLED &&
+ state != MEI_DEV_POWER_DOWN &&
+ state != MEI_DEV_POWER_UP)
- dev_warn(&dev->pdev->dev, "unexpected reset: dev_state = %s\n",
++ dev_warn_ratelimited(&dev->pdev->dev, "unexpected reset: dev_state = %s\n",
+ mei_dev_state_str(state));
- /*
- * Reserving the first client ID
- * 0: Reserved for MEI Bus Message communications
+ /* we're already in reset, cancel the init timer
+ * if the reset was called due the hbm protocol error
+ * we need to call it before hw start
+ * so the hbm watchdog won't kick in
*/
- bitmap_set(dev->host_clients_map, 0, 1);
+ mei_hbm_idle(dev);
+
+ /* enter reset flow */
+ interrupts_enabled = state != MEI_DEV_POWER_DOWN;
+ dev->dev_state = MEI_DEV_RESETTING;
+
+ dev->reset_count++;
+ if (dev->reset_count > MEI_MAX_CONSEC_RESET) {
+ dev_err(&dev->pdev->dev, "reset: reached maximal consecutive resets: disabling the device\n");
+ dev->dev_state = MEI_DEV_DISABLED;
+ return -ENODEV;
+ }
+
+ ret = mei_hw_reset(dev, interrupts_enabled);
+ /* fall through and remove the sw state even if hw reset has failed */
+
+ /* no need to clean up software state in case of power up */
+ if (state != MEI_DEV_INITIALIZING &&
+ state != MEI_DEV_POWER_UP) {
+
+ /* remove all waiting requests */
+ mei_cl_all_write_clear(dev);
+
+ mei_cl_all_disconnect(dev);
+
+ /* wake up all readers and writers so they can be interrupted */
+ mei_cl_all_wakeup(dev);
+
+ /* remove entry if already in list */
+ dev_dbg(&dev->pdev->dev, "remove iamthif and wd from the file list.\n");
+ mei_cl_unlink(&dev->wd_cl);
+ mei_cl_unlink(&dev->iamthif_cl);
+ mei_amthif_reset_params(dev);
+ memset(&dev->wr_ext_msg, 0, sizeof(dev->wr_ext_msg));
+ }
+
+
+ dev->me_clients_num = 0;
+ dev->rd_msg_hdr = 0;
+ dev->wd_pending = false;
+
+ if (ret) {
+ dev_err(&dev->pdev->dev, "hw_reset failed ret = %d\n", ret);
+ dev->dev_state = MEI_DEV_DISABLED;
+ return ret;
+ }
+
+ if (state == MEI_DEV_POWER_DOWN) {
+ dev_dbg(&dev->pdev->dev, "powering down: end of reset\n");
+ dev->dev_state = MEI_DEV_DISABLED;
+ return 0;
+ }
+
+ ret = mei_hw_start(dev);
+ if (ret) {
+ dev_err(&dev->pdev->dev, "hw_start failed ret = %d\n", ret);
+ dev->dev_state = MEI_DEV_DISABLED;
+ return ret;
+ }
+
+ dev_dbg(&dev->pdev->dev, "link is established start sending messages.\n");
+
+ dev->dev_state = MEI_DEV_INIT_CLIENTS;
+ ret = mei_hbm_start_req(dev);
+ if (ret) {
+ dev_err(&dev->pdev->dev, "hbm_start failed ret = %d\n", ret);
+ dev->dev_state = MEI_DEV_DISABLED;
+ return ret;
+ }
+
+ return 0;
}
-EXPORT_SYMBOL_GPL(mei_device_init);
+EXPORT_SYMBOL_GPL(mei_reset);
/**
* mei_start - initializes host and fw to start work.
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