From: Artemy Kovalyov Date: Wed, 18 Jan 2017 14:58:08 +0000 (+0200) Subject: IB/umem: Indicate that process is being terminated X-Git-Tag: v4.14-rc1~1433^2~12 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d9d0674c0f8a950634fd2166a291e93e606a576c;p=platform%2Fkernel%2Flinux-rpi.git IB/umem: Indicate that process is being terminated When process is killed while pagefault operation still in progress - function will fail. In this specific case we don't want any warnings in dmesg to avoid log analyzers false alerts. So we need distinct error code for this case. Signed-off-by: Artemy Kovalyov Signed-off-by: Leon Romanovsky Signed-off-by: Doug Ledford --- diff --git a/drivers/infiniband/core/umem_odp.c b/drivers/infiniband/core/umem_odp.c index 1104d36..f2fc043 100644 --- a/drivers/infiniband/core/umem_odp.c +++ b/drivers/infiniband/core/umem_odp.c @@ -573,7 +573,8 @@ out: * for failure. * An -EAGAIN error code is returned when a concurrent mmu notifier prevents * the function from completing its task. - * + * An -ENOENT error code indicates that userspace process is being terminated + * and mm was already destroyed. * @umem: the umem to map and pin * @user_virt: the address from which we need to map. * @bcnt: the minimal number of bytes to pin and map. The mapping might be @@ -621,7 +622,7 @@ int ib_umem_odp_map_dma_pages(struct ib_umem *umem, u64 user_virt, u64 bcnt, owning_mm = get_task_mm(owning_process); if (owning_mm == NULL) { - ret = -EINVAL; + ret = -ENOENT; goto out_put_task; }