[xen staging] video/vesa: unmap frame buffer when relinquishing console

[patchbot@xxxxxxx]

commit f627a39c5e7539502624648aeb69e9ff0de2b8e5
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Fri Feb 18 14:44:32 2022 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Fri Feb 18 14:44:32 2022 +0100

    video/vesa: unmap frame buffer when relinquishing console
    
    There's no point in keeping the VA space occupied when no further output
    will occur.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/drivers/video/lfb.c  | 1 +
 xen/drivers/video/vesa.c | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/xen/drivers/video/lfb.c b/xen/drivers/video/lfb.c
index 75b749b330..9254b5e902 100644
--- a/xen/drivers/video/lfb.c
+++ b/xen/drivers/video/lfb.c
@@ -168,4 +168,5 @@ void lfb_free(void)
     xfree(lfb.lbuf);
     xfree(lfb.text_buf);
     xfree(lfb.line_len);
+    lfb.lfbp.lfb = ZERO_BLOCK_PTR;
 }
diff --git a/xen/drivers/video/vesa.c b/xen/drivers/video/vesa.c
index f9169f701f..b9bdfc1670 100644
--- a/xen/drivers/video/vesa.c
+++ b/xen/drivers/video/vesa.c
@@ -197,5 +197,7 @@ void __init vesa_endboot(bool_t keep)
                    vlfb_info.width * bpp);
         lfb_flush();
         lfb_free();
+        iounmap(lfb);
+        lfb = ZERO_BLOCK_PTR;
     }
 }
--
generated by git-patchbot for /home/xen/git/xen.git#staging