From: Ian Munsie <imunsie@au1.ibm.com>
Date: Mon, 8 Dec 2014 08:17:57 +0000 (+1100)
Subject: cxl: Fix leaking interrupts if attach process fails
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=456295e284beb7b61a55ead9500d30f94ab06d52;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

cxl: Fix leaking interrupts if attach process fails

In this particular error path we have already allocated the AFU
interrupts, but have not yet set the status to STARTED. The detach
context code will only attempt to release the interrupts if the context
is in state STARTED, so in this case the interrupts would remain
allocated.

This patch releases the AFU interrupts immediately if the attach call
fails to prevent them leaking.

Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---

diff --git a/drivers/misc/cxl/file.c b/drivers/misc/cxl/file.c
index e9f2f10dbb37..b09be4462294 100644
--- a/drivers/misc/cxl/file.c
+++ b/drivers/misc/cxl/file.c
@@ -185,8 +185,10 @@ static long afu_ioctl_start_work(struct cxl_context *ctx,
 	ctx->pid = get_pid(get_task_pid(current, PIDTYPE_PID));
 
 	if ((rc = cxl_attach_process(ctx, false, work.work_element_descriptor,
-				     amr)))
+				     amr))) {
+		afu_release_irqs(ctx);
 		goto out;
+	}
 
 	ctx->status = STARTED;
 	rc = 0;