[PATCH V2] staging: vc04_services: vchiq_arm: Fix NULL ptr dereferences

[Stefan Wahren]

The commit 8c9753f63905 ("staging: vc04_services: vchiq_arm: Drop
g_cache_line_size") introduced NULL pointer dereferences by
using the wrong device.

Fixes: 8c9753f63905 ("staging: vc04_services: vchiq_arm: Drop g_cache_line_size")
Signed-off-by: Stefan Wahren <wahrenst at gmx.net>
---

Changes in V2:
- drop cosmetic changes as noticed by Laurent

 drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
index 502ddc0f6e46..c06232fcb0fb 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
@@ -257,7 +257,7 @@ create_pagelist(struct vchiq_instance *instance, char *buf, char __user *ubuf,
 	if (count >= INT_MAX - PAGE_SIZE)
 		return NULL;

-	drv_mgmt = dev_get_drvdata(instance->state->dev->parent);
+	drv_mgmt = dev_get_drvdata(instance->state->dev);

 	if (buf)
 		offset = (uintptr_t)buf & (PAGE_SIZE - 1);
@@ -436,7 +436,7 @@ free_pagelist(struct vchiq_instance *instance, struct vchiq_pagelist_info *pagel

 	dev_dbg(instance->state->dev, "arm: %pK, %d\n", pagelistinfo->pagelist, actual);

-	drv_mgmt = dev_get_drvdata(instance->state->dev->parent);
+	drv_mgmt = dev_get_drvdata(instance->state->dev);

 	/*
 	 * NOTE: dma_unmap_sg must be called before the
--
2.34.1