From: Oleksandr Andrushchenko <andr2000@gmail.com>
To: alsa-devel@alsa-project.org, xen-devel@lists.xen.org,
linux-kernel@vger.kernel.org
Cc: perex@perex.cz, tiwai@suse.com, andr2000@gmail.com,
Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Subject: [PATCH RESEND1 02/12] ALSA: vsnd: Implement driver's probe/remove
Date: Mon, 7 Aug 2017 15:22:47 +0300 [thread overview]
Message-ID: <1502108577-8099-3-git-send-email-andr2000@gmail.com> (raw)
In-Reply-To: <1502108577-8099-1-git-send-email-andr2000@gmail.com>
From: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Add essential driver private info structure, initialize
locks and implement probe/remove of the Xen frontend
driver.
Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
---
sound/drivers/xen-front.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/sound/drivers/xen-front.c b/sound/drivers/xen-front.c
index 61779c36cae3..8c5de7b0e7b5 100644
--- a/sound/drivers/xen-front.c
+++ b/sound/drivers/xen-front.c
@@ -26,6 +26,16 @@
#include <xen/interface/io/sndif.h>
+struct xdrv_info {
+ struct xenbus_device *xb_dev;
+ spinlock_t io_lock;
+ struct mutex mutex;
+};
+
+static void xdrv_remove_internal(struct xdrv_info *drv_info)
+{
+}
+
static void xdrv_be_on_changed(struct xenbus_device *xb_dev,
enum xenbus_state backend_state)
{
@@ -34,11 +44,28 @@ static void xdrv_be_on_changed(struct xenbus_device *xb_dev,
static int xdrv_probe(struct xenbus_device *xb_dev,
const struct xenbus_device_id *id)
{
+ struct xdrv_info *drv_info;
+
+ drv_info = devm_kzalloc(&xb_dev->dev, sizeof(*drv_info), GFP_KERNEL);
+ if (!drv_info) {
+ xenbus_dev_fatal(xb_dev, -ENOMEM, "allocating device memory");
+ return -ENOMEM;
+ }
+
+ drv_info->xb_dev = xb_dev;
+ spin_lock_init(&drv_info->io_lock);
+ mutex_init(&drv_info->mutex);
+ dev_set_drvdata(&xb_dev->dev, drv_info);
return 0;
}
static int xdrv_remove(struct xenbus_device *dev)
{
+ struct xdrv_info *drv_info = dev_get_drvdata(&dev->dev);
+
+ mutex_lock(&drv_info->mutex);
+ xdrv_remove_internal(drv_info);
+ mutex_unlock(&drv_info->mutex);
return 0;
}
--
2.7.4
next prev parent reply other threads:[~2017-08-07 12:23 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-07 12:22 [PATCH RESEND1 00/12] ALSA: vsnd: Add Xen para-virtualized frontend driver Oleksandr Andrushchenko
2017-08-07 12:22 ` [PATCH RESEND1 01/12] ALSA: vsnd: Introduce Xen para-virtualized sound " Oleksandr Andrushchenko
2017-08-07 12:22 ` Oleksandr Andrushchenko [this message]
2017-08-07 12:22 ` [PATCH RESEND1 03/12] ALSA: vsnd: Implement Xen bus state handling Oleksandr Andrushchenko
2017-08-07 12:22 ` [PATCH RESEND1 04/12] ALSA: vsnd: Read sound driver configuration from Xen store Oleksandr Andrushchenko
2017-08-07 12:22 ` [PATCH RESEND1 05/12] ALSA: vsnd: Implement Xen event channel handling Oleksandr Andrushchenko
2017-08-07 12:22 ` [PATCH RESEND1 06/12] ALSA: vsnd: Implement handling of shared buffers Oleksandr Andrushchenko
2017-08-07 12:22 ` [PATCH RESEND1 07/12] ALSA: vsnd: Introduce ALSA virtual sound driver Oleksandr Andrushchenko
2017-08-07 12:22 ` [PATCH RESEND1 08/12] ALSA: vsnd: Initialize virtul sound card Oleksandr Andrushchenko
2017-08-07 12:22 ` [PATCH RESEND1 09/12] ALSA: vsnd: Add timer for period interrupt emulation Oleksandr Andrushchenko
2017-08-07 12:22 ` [PATCH RESEND1 10/12] ALSA: vsnd: Implement ALSA PCM operations Oleksandr Andrushchenko
2017-08-07 12:22 ` [PATCH RESEND1 11/12] ALSA: vsnd: Implement communication with backend Oleksandr Andrushchenko
2017-08-07 12:22 ` [PATCH RESEND1 12/12] ALSA: vsnd: Introduce Kconfig option to enable Xen PV sound Oleksandr Andrushchenko
2017-08-10 3:14 ` [PATCH RESEND1 00/12] ALSA: vsnd: Add Xen para-virtualized frontend driver Takashi Sakamoto
2017-08-10 8:10 ` Oleksandr Andrushchenko
2017-08-17 10:05 ` [Xen-devel] " Oleksandr Grytsov
2017-08-18 5:43 ` Takashi Sakamoto
2017-08-18 5:56 ` Oleksandr Andrushchenko
2017-08-18 7:17 ` Takashi Sakamoto
2017-08-18 7:23 ` Oleksandr Andrushchenko
2017-08-22 2:43 ` Takashi Sakamoto
2017-08-23 14:51 ` Oleksandr Grytsov
2017-08-24 4:38 ` Takashi Sakamoto
2017-08-24 7:04 ` Oleksandr Andrushchenko
2017-09-04 7:21 ` Oleksandr Andrushchenko
2017-09-05 7:24 ` [alsa-devel] " Clemens Ladisch
2017-09-12 7:52 ` Oleksandr Grytsov
2017-09-19 8:57 ` Oleksandr Andrushchenko
2017-09-26 11:35 ` Oleksandr Andrushchenko
2017-10-04 6:50 ` Oleksandr Andrushchenko
2017-10-13 6:15 ` Oleksandr Andrushchenko
2017-10-30 6:33 ` [RFC] " Oleksandr Andrushchenko
2017-11-02 9:44 ` Takashi Sakamoto
2017-11-02 9:55 ` Oleksandr Andrushchenko
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