diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2016-08-18 17:16:41 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-11-18 10:51:50 +0100 |
| commit | c5e9e5cc8cd1db6105f543d1a667f0334f2ca679 (patch) | |
| tree | bc1a5d1c771af072ca6bb74baf79af7662ce0175 | |
| parent | 813617a4c8dce216ee1b1569858d8938c681210e (diff) | |
agp/intel: Flush chipset writes after updating a single PTE
commit 3497971a71d8b15a41b7bf2bf66ebf5909b2bd3f upstream.
After we update one PTE for a page, the caller expects to be able to
immediately use that through a GGTT read/write. To comply with the
callers expectations we therefore need to flush the chipset buffers
before returning.
Reported-by: Matti Hämäläinen <ccr@tnsp.org>
Fixes: d6473f566417 ("drm/i915: Add support for mapping an object page...")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ankitprasad Sharma <ankitprasad.r.sharma@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Tested-by: Matti Hämäläinen <ccr@tnsp.org>
Cc: drm-intel-fixes@lists.freedesktop.org
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20160818161718.27187-2-chris@chris-wilson.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/char/agp/intel-gtt.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c index 44311296ec02..0f7d28a98b9a 100644 --- a/drivers/char/agp/intel-gtt.c +++ b/drivers/char/agp/intel-gtt.c @@ -845,6 +845,8 @@ void intel_gtt_insert_page(dma_addr_t addr, unsigned int flags) { intel_private.driver->write_entry(addr, pg, flags); + if (intel_private.driver->chipset_flush) + intel_private.driver->chipset_flush(); } EXPORT_SYMBOL(intel_gtt_insert_page); |