Messages in this thread Patch in this message | | | Date | Fri, 27 Apr 2007 10:50:27 +0200 | From | Matthias Kaehlcke <> | Subject | [PATCH 4/5] pvrusb2: use mutex instead of semaphore |
| |
the pvrusb2 driver use a semaphore as mutex. use the mutex API instead of the (binary) semaphore
Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>
-- diff --git a/drivers/media/video/pvrusb2/pvrusb2-hdw.c b/drivers/media/video/pvrusb2/pvrusb2-hdw.c index 9916cf3..ea450b0 100644 --- a/drivers/media/video/pvrusb2/pvrusb2-hdw.c +++ b/drivers/media/video/pvrusb2/pvrusb2-hdw.c @@ -83,7 +83,7 @@ static struct pvr2_string_table pvr2_client_lists[] = { }; static struct pvr2_hdw *unit_pointers[PVR_NUM] = {[ 0 ... PVR_NUM-1 ] = NULL}; -static DECLARE_MUTEX(pvr2_unit_sem); +static DEFINE_MUTEX(pvr2_unit_mtx); static int ctlchg = 0; static int initusbreset = 1; @@ -2069,14 +2069,14 @@ struct pvr2_hdw *pvr2_hdw_create(struct usb_interface *intf, hdw->ctl_read_urb = usb_alloc_urb(0,GFP_KERNEL); if (!hdw->ctl_read_urb) goto fail; - down(&pvr2_unit_sem); do { + mutex_lock(&pvr2_unit_mtx); do { for (idx = 0; idx < PVR_NUM; idx++) { if (unit_pointers[idx]) continue; hdw->unit_number = idx; unit_pointers[idx] = hdw; break; } - } while (0); up(&pvr2_unit_sem); + } while (0); mutex_unlock(&pvr2_unit_mtx); cnt1 = 0; cnt2 = scnprintf(hdw->name+cnt1,sizeof(hdw->name)-cnt1,"pvrusb2"); @@ -2174,13 +2174,13 @@ void pvr2_hdw_destroy(struct pvr2_hdw *hdw) } pvr2_i2c_core_done(hdw); pvr2_hdw_remove_usb_stuff(hdw); - down(&pvr2_unit_sem); do { + mutex_lock(&pvr2_unit_mtx); do { if ((hdw->unit_number >= 0) && (hdw->unit_number < PVR_NUM) && (unit_pointers[hdw->unit_number] == hdw)) { unit_pointers[hdw->unit_number] = NULL; } - } while (0); up(&pvr2_unit_sem); + } while (0); mutex_unlock(&pvr2_unit_mtx); kfree(hdw->controls); kfree(hdw->mpeg_ctrl_info); kfree(hdw->std_defs); -- Matthias Kaehlcke Linux Application Developer Barcelona
The assumption that what currently exists must necessarily exist is the acid that corrodes all visionary thinking .''`. using free software / Debian GNU/Linux | http://debian.org : :' : `. `'` gpg --keyserver pgp.mit.edu --recv-keys 47D8E5D4 `- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |