From: Samuel Ortiz <sameo@linux.intel.com>
To: "John W. Linville" <linville@tuxdriver.com>
Cc: Lauro Ramos Venancio <lauro.venancio@openbossa.org>,
Aloisio Almeida Jr <aloisio.almeida@openbossa.org>,
Ilan Elias <ilane@ti.com>,
Eric Lapuyade <eric.lapuyade@linux.intel.com>,
linux-wireless@vger.kernel.org,
Samuel Ortiz <sameo@linux.intel.com>
Subject: [PATCH 15/18] NFC: Convert pn533 from tasklet to workqueues
Date: Tue, 10 Apr 2012 19:43:17 +0200 [thread overview]
Message-ID: <1334079800-10671-16-git-send-email-sameo@linux.intel.com> (raw)
In-Reply-To: <1334079800-10671-1-git-send-email-sameo@linux.intel.com>
There is no need for soft IRQ contexts, and workqueues are more flexible.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
---
drivers/nfc/pn533.c | 86 ++++++++++++++++++++++++++++----------------------
1 files changed, 48 insertions(+), 38 deletions(-)
diff --git a/drivers/nfc/pn533.c b/drivers/nfc/pn533.c
index cb6204f..f2ee06f 100644
--- a/drivers/nfc/pn533.c
+++ b/drivers/nfc/pn533.c
@@ -266,9 +266,10 @@ struct pn533 {
int in_maxlen;
struct pn533_frame *in_frame;
- struct tasklet_struct tasklet;
- struct pn533_frame *tklt_in_frame;
- int tklt_in_error;
+ struct workqueue_struct *wq;
+ struct work_struct cmd_work;
+ struct pn533_frame *wq_in_frame;
+ int wq_in_error;
pn533_cmd_complete_t cmd_complete;
void *cmd_complete_arg;
@@ -383,15 +384,21 @@ static bool pn533_rx_frame_is_cmd_response(struct pn533_frame *frame, u8 cmd)
return (PN533_FRAME_CMD(frame) == PN533_CMD_RESPONSE(cmd));
}
-static void pn533_tasklet_cmd_complete(unsigned long arg)
+
+static void pn533_wq_cmd_complete(struct work_struct *work)
{
- struct pn533 *dev = (struct pn533 *) arg;
- struct pn533_frame *in_frame = dev->tklt_in_frame;
+ struct pn533 *dev = container_of(work, struct pn533, cmd_work);
+ struct pn533_frame *in_frame;
int rc;
- if (dev->tklt_in_error)
+ if (dev == NULL)
+ return;
+
+ in_frame = dev->wq_in_frame;
+
+ if (dev->wq_in_error)
rc = dev->cmd_complete(dev, dev->cmd_complete_arg, NULL,
- dev->tklt_in_error);
+ dev->wq_in_error);
else
rc = dev->cmd_complete(dev, dev->cmd_complete_arg,
PN533_FRAME_CMD_PARAMS_PTR(in_frame),
@@ -406,7 +413,7 @@ static void pn533_recv_response(struct urb *urb)
struct pn533 *dev = urb->context;
struct pn533_frame *in_frame;
- dev->tklt_in_frame = NULL;
+ dev->wq_in_frame = NULL;
switch (urb->status) {
case 0:
@@ -417,36 +424,36 @@ static void pn533_recv_response(struct urb *urb)
case -ESHUTDOWN:
nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
" status: %d", urb->status);
- dev->tklt_in_error = urb->status;
- goto sched_tasklet;
+ dev->wq_in_error = urb->status;
+ goto sched_wq;
default:
nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:"
" %d", urb->status);
- dev->tklt_in_error = urb->status;
- goto sched_tasklet;
+ dev->wq_in_error = urb->status;
+ goto sched_wq;
}
in_frame = dev->in_urb->transfer_buffer;
if (!pn533_rx_frame_is_valid(in_frame)) {
nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
- dev->tklt_in_error = -EIO;
- goto sched_tasklet;
+ dev->wq_in_error = -EIO;
+ goto sched_wq;
}
if (!pn533_rx_frame_is_cmd_response(in_frame, dev->cmd)) {
nfc_dev_err(&dev->interface->dev, "The received frame is not "
"response to the last command");
- dev->tklt_in_error = -EIO;
- goto sched_tasklet;
+ dev->wq_in_error = -EIO;
+ goto sched_wq;
}
nfc_dev_dbg(&dev->interface->dev, "Received a valid frame");
- dev->tklt_in_error = 0;
- dev->tklt_in_frame = in_frame;
+ dev->wq_in_error = 0;
+ dev->wq_in_frame = in_frame;
-sched_tasklet:
- tasklet_schedule(&dev->tasklet);
+sched_wq:
+ queue_work(dev->wq, &dev->cmd_work);
}
static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
@@ -471,21 +478,21 @@ static void pn533_recv_ack(struct urb *urb)
case -ESHUTDOWN:
nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
" status: %d", urb->status);
- dev->tklt_in_error = urb->status;
- goto sched_tasklet;
+ dev->wq_in_error = urb->status;
+ goto sched_wq;
default:
nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:"
" %d", urb->status);
- dev->tklt_in_error = urb->status;
- goto sched_tasklet;
+ dev->wq_in_error = urb->status;
+ goto sched_wq;
}
in_frame = dev->in_urb->transfer_buffer;
if (!pn533_rx_frame_is_ack(in_frame)) {
nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
- dev->tklt_in_error = -EIO;
- goto sched_tasklet;
+ dev->wq_in_error = -EIO;
+ goto sched_wq;
}
nfc_dev_dbg(&dev->interface->dev, "Received a valid ack");
@@ -494,15 +501,15 @@ static void pn533_recv_ack(struct urb *urb)
if (rc) {
nfc_dev_err(&dev->interface->dev, "usb_submit_urb failed with"
" result %d", rc);
- dev->tklt_in_error = rc;
- goto sched_tasklet;
+ dev->wq_in_error = rc;
+ goto sched_wq;
}
return;
-sched_tasklet:
- dev->tklt_in_frame = NULL;
- tasklet_schedule(&dev->tasklet);
+sched_wq:
+ dev->wq_in_frame = NULL;
+ queue_work(dev->wq, &dev->cmd_work);
}
static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
@@ -1668,7 +1675,10 @@ static int pn533_probe(struct usb_interface *interface,
NULL, 0,
pn533_send_complete, dev);
- tasklet_init(&dev->tasklet, pn533_tasklet_cmd_complete, (ulong)dev);
+ INIT_WORK(&dev->cmd_work, pn533_wq_cmd_complete);
+ dev->wq = create_singlethread_workqueue("pn533");
+ if (dev->wq == NULL)
+ goto error;
usb_set_intfdata(interface, dev);
@@ -1678,7 +1688,7 @@ static int pn533_probe(struct usb_interface *interface,
rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
dev->in_maxlen);
if (rc)
- goto kill_tasklet;
+ goto destroy_wq;
fw_ver = (struct pn533_fw_version *)
PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
@@ -1694,7 +1704,7 @@ static int pn533_probe(struct usb_interface *interface,
PN533_CMD_DATAEXCH_HEAD_LEN,
PN533_FRAME_TAIL_SIZE);
if (!dev->nfc_dev)
- goto kill_tasklet;
+ goto destroy_wq;
nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
nfc_set_drvdata(dev->nfc_dev, dev);
@@ -1720,8 +1730,8 @@ static int pn533_probe(struct usb_interface *interface,
free_nfc_dev:
nfc_free_device(dev->nfc_dev);
-kill_tasklet:
- tasklet_kill(&dev->tasklet);
+destroy_wq:
+ destroy_workqueue(dev->wq);
error:
kfree(dev->in_frame);
usb_free_urb(dev->in_urb);
@@ -1744,7 +1754,7 @@ static void pn533_disconnect(struct usb_interface *interface)
usb_kill_urb(dev->in_urb);
usb_kill_urb(dev->out_urb);
- tasklet_kill(&dev->tasklet);
+ destroy_workqueue(dev->wq);
kfree(dev->in_frame);
usb_free_urb(dev->in_urb);
--
1.7.9.1
next prev parent reply other threads:[~2012-04-10 17:36 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-10 17:43 [PATCH 00/18] NFC changes for 3.5 Samuel Ortiz
2012-04-10 17:43 ` [PATCH 01/18 3.4] NFC: Fix the LLCP Tx fragmentation loop Samuel Ortiz
2012-04-10 17:43 ` [PATCH 02/18] NFC: Add a target lost netlink event Samuel Ortiz
2012-04-10 17:43 ` [PATCH 03/18] NFC: Export target lost function Samuel Ortiz
2012-04-10 17:43 ` [PATCH 04/18] NFC: HCI support Samuel Ortiz
2012-04-10 17:43 ` [PATCH 05/18] NFC: SHDLC implementation Samuel Ortiz
2012-04-10 17:43 ` [PATCH 06/18] NFC: Add HCI documentation Samuel Ortiz
2012-04-10 17:43 ` [PATCH 07/18] NFC: The core part should generate the target index Samuel Ortiz
2012-04-10 17:43 ` [PATCH 08/18] NFC: Fix next target_idx type and rename for clarity Samuel Ortiz
2012-04-10 17:43 ` [PATCH 09/18] NFC: Changed target activated state logic Samuel Ortiz
2012-04-10 17:43 ` [PATCH 10/18] NFC: Add Core support to generate tag lost event Samuel Ortiz
2012-04-10 17:43 ` [PATCH 11/18] NFC: Dump LLCP frames Samuel Ortiz
2012-04-10 17:43 ` [PATCH 12/18] NFC: No need to apply twice the modulo op to LLCP's recv_n Samuel Ortiz
2012-04-10 17:43 ` [PATCH 13/18] NFC: Fix LLCP TLV building routine Samuel Ortiz
2012-04-10 17:43 ` [PATCH 14/18] NFC: Call llcp_add_header properly when sending LLCP DM or DISC Samuel Ortiz
2012-04-10 17:43 ` Samuel Ortiz [this message]
2012-04-10 17:43 ` [PATCH 16/18] NFC: pn533 Rx chaining support Samuel Ortiz
2012-04-10 17:43 ` [PATCH 17/18] NFC: Add MIUX to the local LLCP general bytes Samuel Ortiz
2012-04-10 17:43 ` [PATCH 18/18] NFC: Fix LLCP link timeout typo Samuel Ortiz
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