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gpu: ipu-v3: image-convert: Allow reentrancy into abort 

Allow reentrancy into ipu_image_convert_abort(), by moving re-init
of ctx->aborted completion under the spin lock, and only if there is
an active run, and complete all waiters do_bh(). Note:
ipu_image_convert_unprepare() is still _not_ reentrant, and can't
be made reentrant.

Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
This commit is contained in:
Steve Longerbeam 2018-09-19 16:17:15 -07:00 committed by Philipp Zabel
parent 920340ae1f
commit aa60b261c6
1 changed files with 4 additions and 3 deletions
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7
drivers/gpu/ipu-v3/ipu-image-convert.c
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@ -896,7 +896,7 @@ static irqreturn_t do_bh(int irq, void *dev_id)
dev_dbg(priv->ipu->dev,
"%s: task %u: signaling abort for ctx %p\n",
__func__, chan->ic_task, ctx);
complete(&ctx->aborted);
complete_all(&ctx->aborted);
}
}
@ -1533,8 +1533,6 @@ static void __ipu_image_convert_abort(struct ipu_image_convert_ctx *ctx)
int run_count, ret;
bool need_abort;
reinit_completion(&ctx->aborted);
spin_lock_irqsave(&chan->irqlock, flags);
/* move all remaining pending runs in this context to done_q */
@ -1549,6 +1547,9 @@ static void __ipu_image_convert_abort(struct ipu_image_convert_ctx *ctx)
active_run = (chan->current_run && chan->current_run->ctx == ctx) ?
chan->current_run : NULL;
if (active_run)
reinit_completion(&ctx->aborted);
need_abort = (run_count || active_run);
ctx->aborting = true;