| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Mon, 10 Feb 2020 10:38:01 +0100
From: Gerd Hoffmann <kraxel@...hat.com>
To: dri-devel@...ts.freedesktop.org
Cc: daniel@...ll.ch, Gerd Hoffmann <kraxel@...hat.com>,
David Airlie <airlied@...ux.ie>,
virtualization@...ts.linux-foundation.org (open list:DRM DRIVER FOR
BOCHS VIRTUAL GPU), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v2] drm/bochs: add drm_driver.release callback.
Call drm_dev_unregister() first in bochs_pci_remove(). Hook
bochs_unload() into the new .release callback, to make sure cleanup
is done when all users are gone.
Add ready bool to state struct and move bochs_hw_fini() call from
bochs_unload() to bochs_pci_remove() to make sure hardware is not
touched after bochs_pci_remove returns.
Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>
---
drivers/gpu/drm/bochs/bochs.h | 1 +
drivers/gpu/drm/bochs/bochs_drv.c | 6 +++---
drivers/gpu/drm/bochs/bochs_hw.c | 14 ++++++++++++++
3 files changed, 18 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/bochs/bochs.h b/drivers/gpu/drm/bochs/bochs.h
index 917767173ee6..f6bce8669274 100644
--- a/drivers/gpu/drm/bochs/bochs.h
+++ b/drivers/gpu/drm/bochs/bochs.h
@@ -57,6 +57,7 @@ struct bochs_device {
unsigned long fb_base;
unsigned long fb_size;
unsigned long qext_size;
+ bool ready;
/* mode */
u16 xres;
diff --git a/drivers/gpu/drm/bochs/bochs_drv.c b/drivers/gpu/drm/bochs/bochs_drv.c
index 10460878414e..60b5492739ef 100644
--- a/drivers/gpu/drm/bochs/bochs_drv.c
+++ b/drivers/gpu/drm/bochs/bochs_drv.c
@@ -23,7 +23,6 @@ static void bochs_unload(struct drm_device *dev)
bochs_kms_fini(bochs);
bochs_mm_fini(bochs);
- bochs_hw_fini(dev);
kfree(bochs);
dev->dev_private = NULL;
}
@@ -69,6 +68,7 @@ static struct drm_driver bochs_driver = {
.major = 1,
.minor = 0,
DRM_GEM_VRAM_DRIVER,
+ .release = bochs_unload,
};
/* ---------------------------------------------------------------------- */
@@ -148,9 +148,9 @@ static void bochs_pci_remove(struct pci_dev *pdev)
{
struct drm_device *dev = pci_get_drvdata(pdev);
- drm_atomic_helper_shutdown(dev);
drm_dev_unregister(dev);
- bochs_unload(dev);
+ drm_atomic_helper_shutdown(dev);
+ bochs_hw_fini(dev);
drm_dev_put(dev);
}
diff --git a/drivers/gpu/drm/bochs/bochs_hw.c b/drivers/gpu/drm/bochs/bochs_hw.c
index b615b7dfdd9d..48c1a6a8b026 100644
--- a/drivers/gpu/drm/bochs/bochs_hw.c
+++ b/drivers/gpu/drm/bochs/bochs_hw.c
@@ -168,6 +168,7 @@ int bochs_hw_init(struct drm_device *dev)
}
bochs->fb_base = addr;
bochs->fb_size = size;
+ bochs->ready = true;
DRM_INFO("Found bochs VGA, ID 0x%x.\n", id);
DRM_INFO("Framebuffer size %ld kB @ 0x%lx, %s @ 0x%lx.\n",
@@ -194,6 +195,10 @@ void bochs_hw_fini(struct drm_device *dev)
{
struct bochs_device *bochs = dev->dev_private;
+ bochs->ready = false;
+
+ /* TODO: shot down existing vram mappings */
+
if (bochs->mmio)
iounmap(bochs->mmio);
if (bochs->ioports)
@@ -207,6 +212,9 @@ void bochs_hw_fini(struct drm_device *dev)
void bochs_hw_setmode(struct bochs_device *bochs,
struct drm_display_mode *mode)
{
+ if (!bochs->ready)
+ return;
+
bochs->xres = mode->hdisplay;
bochs->yres = mode->vdisplay;
bochs->bpp = 32;
@@ -237,6 +245,9 @@ void bochs_hw_setmode(struct bochs_device *bochs,
void bochs_hw_setformat(struct bochs_device *bochs,
const struct drm_format_info *format)
{
+ if (!bochs->ready)
+ return;
+
DRM_DEBUG_DRIVER("format %c%c%c%c\n",
(format->format >> 0) & 0xff,
(format->format >> 8) & 0xff,
@@ -264,6 +275,9 @@ void bochs_hw_setbase(struct bochs_device *bochs,
unsigned long offset;
unsigned int vx, vy, vwidth;
+ if (!bochs->ready)
+ return;
+
bochs->stride = stride;
offset = (unsigned long)addr +
y * bochs->stride +
--
2.18.1
Powered by blists - more mailing lists