Hi Am 16.08.22 um 17:36 schrieb Takashi Iwai:
This reverts the recent fix commit
e25d5954264d ("drm/udl: Kill pending URBs at suspend and disconnect")
as it turned out to lead to potential hangup at a disconnection, and
it doesn't help much for suspend/resume problem, either.
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Acked-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
--- drivers/gpu/drm/udl/udl_drv.h | 2 -- drivers/gpu/drm/udl/udl_main.c | 25 +++---------------------- drivers/gpu/drm/udl/udl_modeset.c | 2 -- 3 files changed, 3 insertions(+), 26 deletions(-) diff --git a/drivers/gpu/drm/udl/udl_drv.h b/drivers/gpu/drm/udl/udl_drv.h index 37c14b0ff1fc..5923d2e02bc8 100644 --- a/drivers/gpu/drm/udl/udl_drv.h +++ b/drivers/gpu/drm/udl/udl_drv.h @@ -39,7 +39,6 @@ struct urb_node {struct urb_list {struct list_head list; - struct list_head in_flight; spinlock_t lock; wait_queue_head_t sleep; int available; @@ -85,7 +84,6 @@ static inline struct urb *udl_get_urb(struct drm_device *dev)int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);int udl_sync_pending_urbs(struct drm_device *dev); -void udl_kill_pending_urbs(struct drm_device *dev); void udl_urb_completion(struct urb *urb);int udl_init(struct udl_device *udl);diff --git a/drivers/gpu/drm/udl/udl_main.c b/drivers/gpu/drm/udl/udl_main.c index 7d1e6bbc165c..a9f6b710b254 100644 --- a/drivers/gpu/drm/udl/udl_main.c +++ b/drivers/gpu/drm/udl/udl_main.c @@ -135,7 +135,7 @@ void udl_urb_completion(struct urb *urb) urb->transfer_buffer_length = udl->urbs.size; /* reset to actual */spin_lock_irqsave(&udl->urbs.lock, flags);- list_move(&unode->entry, &udl->urbs.list); + list_add_tail(&unode->entry, &udl->urbs.list); udl->urbs.available++; spin_unlock_irqrestore(&udl->urbs.lock, flags);@@ -180,7 +180,6 @@ static int udl_alloc_urb_list(struct drm_device *dev, int count, size_t size)retry: udl->urbs.size = size; INIT_LIST_HEAD(&udl->urbs.list); - INIT_LIST_HEAD(&udl->urbs.in_flight);init_waitqueue_head(&udl->urbs.sleep);udl->urbs.count = 0; @@ -247,7 +246,7 @@ struct urb *udl_get_urb_timeout(struct drm_device *dev, long timeout) }unode = list_first_entry(&udl->urbs.list, struct urb_node, entry);- list_move(&unode->entry, &udl->urbs.in_flight); + list_del_init(&unode->entry); udl->urbs.available--;unlock:@@ -281,7 +280,7 @@ int udl_sync_pending_urbs(struct drm_device *dev) spin_lock_irq(&udl->urbs.lock); /* 2 seconds as a sane timeout */ if (!wait_event_lock_irq_timeout(udl->urbs.sleep, - list_empty(&udl->urbs.in_flight), + udl->urbs.available == udl->urbs.count, udl->urbs.lock, msecs_to_jiffies(2000))) ret = -ETIMEDOUT; @@ -289,23 +288,6 @@ int udl_sync_pending_urbs(struct drm_device *dev) return ret; }-/* kill pending URBs */-void udl_kill_pending_urbs(struct drm_device *dev) -{ - struct udl_device *udl = to_udl(dev); - struct urb_node *unode; - - spin_lock_irq(&udl->urbs.lock); - while (!list_empty(&udl->urbs.in_flight)) { - unode = list_first_entry(&udl->urbs.in_flight, - struct urb_node, entry); - spin_unlock_irq(&udl->urbs.lock); - usb_kill_urb(unode->urb); - spin_lock_irq(&udl->urbs.lock); - } - spin_unlock_irq(&udl->urbs.lock); -} - int udl_init(struct udl_device *udl) { struct drm_device *dev = &udl->drm; @@ -354,7 +336,6 @@ int udl_drop_usb(struct drm_device *dev) { struct udl_device *udl = to_udl(dev);- udl_kill_pending_urbs(dev);udl_free_urb_list(dev); put_device(udl->dmadev); udl->dmadev = NULL; diff --git a/drivers/gpu/drm/udl/udl_modeset.c b/drivers/gpu/drm/udl/udl_modeset.c index 187aba2d7825..c34d564773a3 100644 --- a/drivers/gpu/drm/udl/udl_modeset.c +++ b/drivers/gpu/drm/udl/udl_modeset.c @@ -398,8 +398,6 @@ udl_simple_display_pipe_disable(struct drm_simple_display_pipe *pipe) struct urb *urb; char *buf;- udl_kill_pending_urbs(dev);- urb = udl_get_urb(dev); if (!urb) return;
-- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Maxfeldstr. 5, 90409 Nürnberg, Germany (HRB 36809, AG Nürnberg) Geschäftsführer: Ivo Totev
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