Re: [edk2-devel] [PATCH] MdeModulePkg/Bus/Pci/UhciDxe: Fix the UsbHc memory allocate and free issue

["Wu, Hao A" <hao.a.wu@intel.com>]

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Thanks for the fix.
Reviewed-by: Hao A Wu <hao.a.wu@intel.com>

Will hold the merging of the patch after the upcoming edk2-stable202111 tag.

Best Regards,
Hao Wu

From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of 张家定
Sent: Thursday, November 25, 2021 11:20 AM
To: devel@edk2.groups.io
Subject: [edk2-devel] [PATCH] MdeModulePkg/Bus/Pci/UhciDxe: Fix the UsbHc memory allocate and free issue

When use the UsbHcAllocMemFromBlock() and UsbHcFreeMem() to allocate memory and free memory for the UHC, it should use the corresponding host address but not the pci bus address.

Signed-off-by: jdzhang <jdzhang@zd-tech.com.cn<mailto:jdzhang@zd-tech.com.cn>>
---
 MdeModulePkg/Bus/Pci/UhciDxe/UsbHcMem.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/MdeModulePkg/Bus/Pci/UhciDxe/UsbHcMem.c b/MdeModulePkg/Bus/Pci/UhciDxe/UsbHcMem.c
index 9aade19f8e..041638a2de 100644
--- a/MdeModulePkg/Bus/Pci/UhciDxe/UsbHcMem.c
+++ b/MdeModulePkg/Bus/Pci/UhciDxe/UsbHcMem.c
@@ -211,7 +211,7 @@ UsbHcAllocMemFromBlock (
     NEXT_BIT (Byte, Bit);
   }

-  return Block->Buf + (StartByte * 8 + StartBit) * USBHC_MEM_UNIT;
+  return Block->BufHost + (StartByte * 8 + StartBit) * USBHC_MEM_UNIT;
 }

 /**
@@ -518,12 +518,12 @@ UsbHcFreeMem (
     // scan the memory block list for the memory block that
     // completely contains the memory to free.
     //
-    if ((Block->Buf <= ToFree) && ((ToFree + AllocSize) <= (Block->Buf + Block->BufLen))) {
+    if ((Block->BufHost <= ToFree) && ((ToFree + AllocSize) <= (Block->BufHost + Block->BufLen))) {
       //
       // compute the start byte and bit in the bit array
       //
-      Byte  = ((ToFree - Block->Buf) / USBHC_MEM_UNIT) / 8;
-      Bit   = ((ToFree - Block->Buf) / USBHC_MEM_UNIT) % 8;
+      Byte  = ((ToFree - Block->BufHost) / USBHC_MEM_UNIT) / 8;
+      Bit   = ((ToFree - Block->BufHost) / USBHC_MEM_UNIT) % 8;

       //
       // reset associated bits in bit array
--
2.30.0.windows.1



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