From 140c7553231dcd119ebda8c27dec7f06aef7e323 Mon Sep 17 00:00:00 2001 From: Alexander Usyskin Date: Thu, 2 Oct 2014 13:39:31 +0300 Subject: [PATCH] mei: drop unneeded client NULL check in cb structure The pointer to client in the callback structure (cb->cl) can't be NULL with current locking. We can drop check and warnings as in some cases this just uselessly complicates the code flow. Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/amthif.c | 24 +++++++++--------------- drivers/misc/mei/client.c | 2 +- drivers/misc/mei/hbm.c | 5 ----- drivers/misc/mei/interrupt.c | 12 +----------- 4 files changed, 11 insertions(+), 32 deletions(-) diff --git a/drivers/misc/mei/amthif.c b/drivers/misc/mei/amthif.c index 6cdce84..0b5a315 100644 --- a/drivers/misc/mei/amthif.c +++ b/drivers/misc/mei/amthif.c @@ -360,8 +360,7 @@ int mei_amthif_write(struct mei_device *dev, struct mei_cl_cb *cb) void mei_amthif_run_next_cmd(struct mei_device *dev) { struct mei_cl_cb *cb; - struct mei_cl_cb *next; - int status; + int ret; if (!dev) return; @@ -376,16 +375,14 @@ void mei_amthif_run_next_cmd(struct mei_device *dev) dev_dbg(dev->dev, "complete amthif cmd_list cb.\n"); - list_for_each_entry_safe(cb, next, &dev->amthif_cmd_list.list, list) { - list_del(&cb->list); - if (!cb->cl) - continue; - status = mei_amthif_send_cmd(dev, cb); - if (status) - dev_warn(dev->dev, "amthif write failed status = %d\n", - status); - break; - } + cb = list_first_entry_or_null(&dev->amthif_cmd_list.list, + typeof(*cb), list); + if (!cb) + return; + list_del(&cb->list); + ret = mei_amthif_send_cmd(dev, cb); + if (ret) + dev_warn(dev->dev, "amthif write failed status = %d\n", ret); } @@ -536,9 +533,6 @@ int mei_amthif_irq_read_msg(struct mei_device *dev, cb = dev->iamthif_current_cb; dev->iamthif_current_cb = NULL; - if (!cb->cl) - return -ENODEV; - dev->iamthif_stall_timer = 0; cb->buf_idx = dev->iamthif_msg_buf_index; cb->read_time = jiffies; diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c index bc9ba53..1382d55 100644 --- a/drivers/misc/mei/client.c +++ b/drivers/misc/mei/client.c @@ -146,7 +146,7 @@ static void __mei_io_list_flush(struct mei_cl_cb *list, /* enable removing everything if no cl is specified */ list_for_each_entry_safe(cb, next, &list->list, list) { - if (!cl || (cb->cl && mei_cl_cmp_id(cl, cb->cl))) { + if (!cl || mei_cl_cmp_id(cl, cb->cl)) { list_del(&cb->list); if (free) mei_io_cb_free(cb); diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c index 49a2653..57c1bde 100644 --- a/drivers/misc/mei/hbm.c +++ b/drivers/misc/mei/hbm.c @@ -637,11 +637,6 @@ static void mei_hbm_cl_res(struct mei_device *dev, list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list.list, list) { cl = cb->cl; - /* this should not happen */ - if (WARN_ON(!cl)) { - list_del_init(&cb->list); - continue; - } if (cb->fop_type != fop_type) continue; diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c index 20c6c511..711cddf 100644 --- a/drivers/misc/mei/interrupt.c +++ b/drivers/misc/mei/interrupt.c @@ -44,8 +44,6 @@ void mei_irq_compl_handler(struct mei_device *dev, struct mei_cl_cb *compl_list) list_for_each_entry_safe(cb, next, &compl_list->list, list) { cl = cb->cl; list_del(&cb->list); - if (!cl) - continue; dev_dbg(dev->dev, "completing call back.\n"); if (cl == &dev->iamthif_cl) @@ -105,7 +103,7 @@ static int mei_cl_irq_read_msg(struct mei_device *dev, list_for_each_entry_safe(cb, next, &dev->read_list.list, list) { cl = cb->cl; - if (!cl || !mei_cl_is_reading(cl, mei_hdr)) + if (!mei_cl_is_reading(cl, mei_hdr)) continue; cl->reading_state = MEI_READING; @@ -449,8 +447,6 @@ int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list) list = &dev->write_waiting_list; list_for_each_entry_safe(cb, next, &list->list, list) { cl = cb->cl; - if (cl == NULL) - continue; cl->status = 0; list_del(&cb->list); @@ -489,10 +485,6 @@ int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list) dev_dbg(dev->dev, "complete control write list cb.\n"); list_for_each_entry_safe(cb, next, &dev->ctrl_wr_list.list, list) { cl = cb->cl; - if (!cl) { - list_del(&cb->list); - return -ENODEV; - } switch (cb->fop_type) { case MEI_FOP_DISCONNECT: /* send disconnect message */ @@ -530,8 +522,6 @@ int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list) dev_dbg(dev->dev, "complete write list cb.\n"); list_for_each_entry_safe(cb, next, &dev->write_list.list, list) { cl = cb->cl; - if (cl == NULL) - continue; if (cl == &dev->iamthif_cl) ret = mei_amthif_irq_write(cl, cb, cmpl_list); else -- 2.7.4