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From: Christoph Hellwig <hch@infradead.org>
To: John Stultz <john.stultz@linaro.org>
Cc: lkml <linux-kernel@vger.kernel.org>,
	"Andrew F. Davis" <afd@ti.com>, Laura Abbott <labbott@redhat.com>,
	Benjamin Gaignard <benjamin.gaignard@linaro.org>,
	Greg KH <gregkh@linuxfoundation.org>,
	Sumit Semwal <sumit.semwal@linaro.org>,
	Liam Mark <lmark@codeaurora.org>,
	Brian Starkey <Brian.Starkey@arm.com>,
	Chenbo Feng <fengc@google.com>,
	Alistair Strachan <astrachan@google.com>,
	dri-devel@lists.freedesktop.org
Subject: Re: [RFC][PATCH 1/5 v2] dma-buf: Add dma-buf heaps framework
Date: Fri, 15 Mar 2019 01:54:46 -0700	[thread overview]
Message-ID: <20190315085446.GA4470@infradead.org> (raw)
In-Reply-To: <1551819273-640-2-git-send-email-john.stultz@linaro.org>

> +static int dma_heap_release(struct inode *inode, struct file *filp)
> +{
> +	filp->private_data = NULL;
> +
> +	return 0;
> +}

No point in clearing ->private_data, the file is about to be freed.

> +
> +static long dma_heap_ioctl(struct file *filp, unsigned int cmd,
> +			   unsigned long arg)

Pleae don't use the weird legacy filp naming, file is a perfectly
valid and readable default name for struct file pointers.

> +{
> +	switch (cmd) {
> +	case DMA_HEAP_IOC_ALLOC:
> +	{
> +		struct dma_heap_allocation_data heap_allocation;
> +		struct dma_heap *heap = filp->private_data;
> +		int fd;

Please split each ioctl into a separate function from the very start,
otherwise this will grow into a spaghetty mess sooner than you can
see cheese.

> +	dev_ret = device_create(dma_heap_class,
> +				NULL,
> +				heap->heap_devt,
> +				NULL,
> +				heap->name);

No need this weird argument alignment.

  parent reply	other threads:[~2019-03-15  8:54 UTC|newest]

Thread overview: 69+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-05 20:54 [RFC][PATCH 0/5 v2] DMA-BUF Heaps (destaging ION) John Stultz
2019-03-05 20:54 ` [RFC][PATCH 1/5 v2] dma-buf: Add dma-buf heaps framework John Stultz
2019-03-06 16:12   ` Benjamin Gaignard
2019-03-06 16:57     ` John Stultz
2019-03-15  8:55     ` Christoph Hellwig
2019-03-06 16:27   ` Andrew F. Davis
2019-03-06 19:03     ` John Stultz
2019-03-06 21:45       ` Andrew F. Davis
2019-03-15  8:54   ` Christoph Hellwig [this message]
2019-03-15 20:24     ` Andrew F. Davis
2019-03-15 20:18   ` Laura Abbott
2019-03-15 20:49     ` Andrew F. Davis
2019-03-15 21:29     ` John Stultz
2019-03-15 22:44       ` Laura Abbott
2019-03-18  4:38         ` Sumit Semwal
2019-03-18  4:41         ` Sumit Semwal
2019-03-19 12:08   ` Brian Starkey
2019-03-19 15:24     ` Andrew F. Davis
2019-03-21 21:16     ` John Stultz
2019-03-27 14:53   ` Greg KH
2019-03-28  6:09     ` John Stultz
2019-03-05 20:54 ` [RFC][PATCH 2/5 v2] dma-buf: heaps: Add heap helpers John Stultz
2019-03-13 20:18   ` Liam Mark
2019-03-13 21:48     ` Andrew F. Davis
2019-03-13 22:57       ` Liam Mark
2019-03-13 23:42         ` Andrew F. Davis
2019-03-15  9:06   ` Christoph Hellwig
2019-03-19 15:03     ` Andrew F. Davis
2019-03-21 20:01     ` John Stultz
2019-03-19 14:26   ` Brian Starkey
2019-03-21 20:11     ` John Stultz
2019-03-21 20:35     ` Andrew F. Davis
2019-03-21 20:43   ` Andrew F. Davis
2019-03-05 20:54 ` [RFC][PATCH 3/5 v2] dma-buf: heaps: Add system heap to dmabuf heaps John Stultz
2019-03-06 16:01   ` Benjamin Gaignard
2019-03-11  5:48     ` John Stultz
2019-03-13 20:20   ` Liam Mark
2019-03-13 22:49     ` John Stultz
2019-03-15  9:06   ` Christoph Hellwig
2019-03-05 20:54 ` [RFC][PATCH 4/5 v2] dma-buf: heaps: Add CMA heap to dmabuf heapss John Stultz
2019-03-06 16:05   ` Benjamin Gaignard
2019-03-21 20:15     ` John Stultz
2019-03-15  9:06   ` Christoph Hellwig
2019-03-15 20:08     ` John Stultz
2019-03-19 14:53   ` Brian Starkey
2019-03-05 20:54 ` [RFC][PATCH 5/5 v2] kselftests: Add dma-heap test John Stultz
2019-03-06 16:14   ` Benjamin Gaignard
2019-03-06 16:35     ` Andrew F. Davis
2019-03-06 18:19       ` John Stultz
2019-03-06 18:32         ` Andrew F. Davis
2019-03-06 17:01     ` John Stultz
2019-03-15 20:07       ` Laura Abbott
2019-03-15 20:13         ` John Stultz
2019-03-15 20:49           ` Laura Abbott
2019-03-13 20:23   ` Liam Mark
2019-03-13 20:11 ` [RFC][PATCH 0/5 v2] DMA-BUF Heaps (destaging ION) Liam Mark
2019-03-13 22:30   ` John Stultz
2019-03-13 23:29     ` Liam Mark
2019-03-19 16:54     ` Benjamin Gaignard
2019-03-19 16:59       ` Andrew F. Davis
2019-03-19 21:58         ` Rob Clark
2019-03-19 22:36           ` John Stultz
2019-03-20  9:16             ` Benjamin Gaignard
2019-03-20 14:44               ` Andrew F. Davis
2019-03-20 15:59                 ` Benjamin Gaignard
2019-03-20 16:11               ` John Stultz
2019-03-15 20:34 ` Laura Abbott
2019-03-15 23:15 ` Jerome Glisse
2019-03-16  0:16   ` John Stultz

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