[xen staging] drivers/char: add console=ehci as an alias for console=dbgp

[patchbot@xxxxxxx]

commit bebaf7c296518bf9cec24773c8da1e6823fff5fc
Author:     Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>
AuthorDate: Mon Sep 26 11:13:31 2022 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Mon Sep 26 11:13:31 2022 +0200

    drivers/char: add console=ehci as an alias for console=dbgp
    
    Make it consistent with console=xhci.
    
    Suggested-by: Jan Beulich <jbeulich@xxxxxxxx>
    Signed-off-by: Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 docs/misc/xen-command-line.pandoc | 4 ++--
 xen/drivers/char/serial.c         | 6 ++++++
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/docs/misc/xen-command-line.pandoc 
b/docs/misc/xen-command-line.pandoc
index bbb4652bbf..68389843b2 100644
--- a/docs/misc/xen-command-line.pandoc
+++ b/docs/misc/xen-command-line.pandoc
@@ -409,7 +409,7 @@ The following are examples of correct specifications:
 Specify the size of the console ring buffer.
 
 ### console
-> `= List of [ vga | com1[H,L] | com2[H,L] | pv | dbgp | xhci | none ]`
+> `= List of [ vga | com1[H,L] | com2[H,L] | pv | dbgp | ehci | xhci | none ]`
 
 > Default: `console=com1,vga`
 
@@ -428,7 +428,7 @@ cleared.  This allows a single port to be shared by two 
subsystems
 `pv` indicates that Xen should use Xen's PV console. This option is
 only available when used together with `pv-in-pvh`.
 
-`dbgp` indicates that Xen should use a USB2 debug port.
+`dbgp` or `ehci` indicates that Xen should use a USB2 debug port.
 
 `xhci` indicates that Xen should use a USB3 debug port.
 
diff --git a/xen/drivers/char/serial.c b/xen/drivers/char/serial.c
index 9d94450392..00efe69574 100644
--- a/xen/drivers/char/serial.c
+++ b/xen/drivers/char/serial.c
@@ -311,6 +311,12 @@ int __init serial_parse_handle(const char *conf)
         goto common;
     }
 
+    if ( !strncmp(conf, "ehci", 4) && (!conf[4] || conf[4] == ',') )
+    {
+        handle = SERHND_DBGP;
+        goto common;
+    }
+
     if ( !strncmp(conf, "xhci", 4) && (!conf[4] || conf[4] == ',') )
     {
         handle = SERHND_XHCI;
--
generated by git-patchbot for /home/xen/git/xen.git#staging