max_hw_sectors = min_not_zero(lim->max_hw_sectors,
lim->max_dev_sectors);
if (lim->max_user_sectors) {
- if (lim->max_user_sectors > max_hw_sectors ||
- lim->max_user_sectors < PAGE_SIZE / SECTOR_SIZE)
+ if (lim->max_user_sectors < PAGE_SIZE / SECTOR_SIZE)
return -EINVAL;
lim->max_sectors = min(max_hw_sectors, lim->max_user_sectors);
} else {
return -EINVAL;
/*
- * Devices that require a virtual boundary do not support scatter/gather
- * I/O natively, but instead require a descriptor list entry for each
- * page (which might not be identical to the Linux PAGE_SIZE). Because
- * of that they are not limited by our notion of "segment size".
+ * Stacking device may have both virtual boundary and max segment
+ * size limit, so allow this setting now, and long-term the two
+ * might need to move out of stacking limits since we have immutable
+ * bvec and lower layer bio splitting is supposed to handle the two
+ * correctly.
*/
- if (lim->virt_boundary_mask) {
- if (WARN_ON_ONCE(lim->max_segment_size &&
- lim->max_segment_size != UINT_MAX))
- return -EINVAL;
- lim->max_segment_size = UINT_MAX;
- } else {
+ if (!lim->virt_boundary_mask) {
/*
* The maximum segment size has an odd historic 64k default that
* drivers probably should override. Just like the I/O size we