From: Christoph Hellwig <hch@lst.de>
To: laurentiu.tudor@nxp.com
Cc: hch@lst.de, stern@rowland.harvard.edu,
gregkh@linuxfoundation.org, linux-usb@vger.kernel.org,
marex@denx.de, leoyang.li@nxp.com, linux-kernel@vger.kernel.org,
robin.murphy@arm.com, noring@nocrew.org, JuergenUrban@gmx.de
Subject: Re: [PATCH v4 2/3] usb: host: ohci-sm501: init genalloc for local memory
Date: Tue, 21 May 2019 12:39:54 +0200 [thread overview]
Message-ID: <20190521103954.GC1973@lst.de> (raw)
In-Reply-To: <20190516114721.27694-3-laurentiu.tudor@nxp.com>
On Thu, May 16, 2019 at 02:47:20PM +0300, laurentiu.tudor@nxp.com wrote:
> + hcd->localmem_pool = devm_gen_pool_create(dev, PAGE_SHIFT,
> + dev_to_node(dev),
> + "ohci-sm501");
> + if (IS_ERR(hcd->localmem_pool)) {
> + retval = PTR_ERR(hcd->localmem_pool);
> + goto err5;
> + }
> +
> + local_mem = devm_ioremap(dev, mem->start, resource_size(mem));
> + if (!local_mem) {
> + retval = -ENOMEM;
> + goto err5;
> + }
> +
> + retval = gen_pool_add_virt(hcd->localmem_pool,
> + (unsigned long)local_mem,
> + mem->start - mem->parent->start,
> + resource_size(mem),
> + dev_to_node(dev));
I wonder if having a helper for these operations would be useful,
explaining what we do here. That is create a pool for a resource,
where the virtual address is the ioremap of said resource. We
could also make that a managed API so that you can get rid of the
cleanup path.
next prev parent reply other threads:[~2019-05-21 10:40 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-16 11:47 [PATCH v4 0/3] prerequisites for device reserved local mem rework laurentiu.tudor
2019-05-16 11:47 ` [PATCH v4 1/3] USB: use genalloc for USB HCs with local memory laurentiu.tudor
2019-05-21 8:16 ` Greg KH
2019-05-21 10:28 ` Christoph Hellwig
2019-05-21 11:04 ` Laurentiu Tudor
2019-05-21 11:15 ` Greg KH
2019-05-16 11:47 ` [PATCH v4 2/3] usb: host: ohci-sm501: init genalloc for " laurentiu.tudor
2019-05-21 10:39 ` Christoph Hellwig [this message]
2019-05-21 11:08 ` Laurentiu Tudor
2019-05-16 11:47 ` [PATCH v4 3/3] usb: host: ohci-tmio: " laurentiu.tudor
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