> +static int ipath_sma_release(struct inode *in, struct file *fp)
> +{
> + int s;
> +
> + ipath_sma_alive = 0;
> + ipath_cdbg(SMA, "Closing SMA device\n");
> + for (s = 0; s < atomic_read(&ipath_max); s++) {
> + struct ipath_devdata *dd = ipath_lookup(s);
> +
> + if (!dd || !(dd->ipath_flags & IPATH_INITTED))
> + continue;
> + *dd->ipath_statusp &= ~IPATH_STATUS_SMA;
> + if (dd->verbs_layer.l_flags & IPATH_VERBS_KERNEL_SMA)
> + *dd->ipath_statusp |= IPATH_STATUS_OIB_SMA;
> + }
> + return 0;
> +}
Similarly what protects against another process opening the device
right after the ipath_sma_alive = 0 setting, but before you do all the
cleanup that's after that?
And what protects against a hot unplug of a device after the test of s
against ipath_max?
- R.
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