From mboxrd@z Thu Jan 1 00:00:00 1970 From: m.szyprowski@samsung.com (Marek Szyprowski) Date: Tue, 05 Aug 2014 12:47:34 +0200 Subject: [PATCH 06/29] drivers: iommu: add notify about failed bind In-Reply-To: <1407235677-26324-1-git-send-email-m.szyprowski@samsung.com> References: <1407235677-26324-1-git-send-email-m.szyprowski@samsung.com> Message-ID: <1407235677-26324-7-git-send-email-m.szyprowski@samsung.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org This patch adds support for forwarding recently introduced BUS_NOTIFY_DRVBIND_FAILED event to iommu groups. This lets us getting a notify for failed device driver bind, so all the items done in IOMMU_GROUP_NOTIFY_BIND_DRIVER event can be cleaned if the driver fails to bind. Signed-off-by: Marek Szyprowski --- drivers/iommu/iommu.c | 3 +++ include/linux/iommu.h | 1 + 2 files changed, 4 insertions(+) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 1698360..516e93a 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -758,6 +758,9 @@ static int iommu_bus_notifier(struct notifier_block *nb, case BUS_NOTIFY_UNBOUND_DRIVER: group_action = IOMMU_GROUP_NOTIFY_UNBOUND_DRIVER; break; + case BUS_NOTIFY_DRVBIND_FAILED: + group_action = IOMMU_GROUP_NOTIFY_DRVBIND_FAILED; + break; } if (group_action) diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 20f9a52..f9fdae5 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -139,6 +139,7 @@ struct iommu_ops { #define IOMMU_GROUP_NOTIFY_BOUND_DRIVER 4 /* Post Driver bind */ #define IOMMU_GROUP_NOTIFY_UNBIND_DRIVER 5 /* Pre Driver unbind */ #define IOMMU_GROUP_NOTIFY_UNBOUND_DRIVER 6 /* Post Driver unbind */ +#define IOMMU_GROUP_NOTIFY_DRVBIND_FAILED 7 /* Driver failed to bind */ extern int bus_set_iommu(struct bus_type *bus, const struct iommu_ops *ops); extern bool iommu_present(struct bus_type *bus); -- 1.9.2