On Tue, Feb 28, 2017 at 08:23:16AM -0800, Tony Lindgren wrote: > * Guenter Roeck <linux@xxxxxxxxxxxx> [170227 15:36]: > > ping ... this problem is now seen in mainline. > > Oops sorry I had accidentally tagged this with "next" instead of > "fixes". > > Looking at the patch though, can't we make of_node_get/put local to > omap3xxx_hwmod_is_hs_ip_block_usable()? > Not really. Strictly speaking the patch fixes two problems: 1) of_find_node_by_name() gets a reference on "bus", thus of_node_put() is necessary to release it. This is the change in omap3xxx_hwmod_init(). 2) of_find_node_by_name() drops a reference to the passed device node, thus it is necessary to call of_node_get(bus) in omap3xxx_hwmod_is_hs_ip_block_usable(). I should have stated that more clearly in the description. We could ignore 1) to get rid of the warning, but that would leave us with a dangling reference to the bus node. I could also improve the description, or split the patch in two. Let me know what you prefer. Another possible change would be to use of_get_child_by_name() instead of of_find_node_by_name(). That would, however, only search immediate children of the 'ocp' node, not all nodes. I think that is what is actually intended here, but I am not entirely sure. Thoughts ? Either case, turns out I'll have to re-submit the patch because, as mentioned above, of_find_node_by_name() gets a reference to the device node it returns, so a put on that node is necessary in omap3xxx_hwmod_is_hs_ip_block_usable(). Guenter -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
