Hi!
> * /sys/class/fpga_manager/<fpga>/firmware
> Name of FPGA image file to load using firmware class.
> $ echo image.rbf > /sys/class/fpga_manager/<fpga>/firmware
I .. still don't think this is good idea. What about namespaces?
The path corresponds to path in which namespace?
> +int fpga_mgr_write(struct fpga_manager *mgr, const char *buf, size_t count)
> +{
> + int ret;
> +
> + if (test_and_set_bit_lock(FPGA_MGR_BUSY, &mgr->flags))
> + return -EBUSY;
> +
> + dev_info(mgr->dev, "writing buffer to %s\n", mgr->name);
> +
> + ret = __fpga_mgr_write(mgr, buf, count);
> + clear_bit_unlock(FPGA_MGR_BUSY, &mgr->flags);
> +
> + return ret;
> +}
> +EXPORT_SYMBOL_GPL(fpga_mgr_write);
Is the EBUSY -- userspace please try again, but you don't know when to
try again -- right interface? I mean, normally kernel would wait, so
that userland does not have to poll?
> +static ssize_t fpga_mgr_firmware_store(struct device *dev,
> + struct device_attribute *attr,
> + const char *buf, size_t count)
> +{
> + struct fpga_manager *mgr = dev_get_drvdata(dev);
> + unsigned int len;
> + char image_name[NAME_MAX];
> + int ret;
> +
> + /* lose terminating \n */
> + strcpy(image_name, buf);
> + len = strlen(image_name);
> + if (image_name[len - 1] == '\n')
> + image_name[len - 1] = 0;
> +
> + ret = fpga_mgr_firmware_write(mgr, image_name);
> + if (ret)
> + return ret;
> +
> + return count;
> +}
This shows why the interface is not right... Valid filename may
contain \n, right? It may even end with \n.
Best regards,
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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