@@ -115,6 +115,35 @@ GetFvbByAddress (
return Status;
}
+/**
+ Check whether a buffer has any data in it, i.e., bytes with value != 0xff
+
+ @param[in] Buffer Address of the buffer
+ @param[in] Length Size of the buffer
+
+ @retval TRUE A non-0xff byte was found
+ @retval FALSE Buffer has 0xff bytes only
+
+**/
+STATIC
+BOOLEAN
+BufferHasData (
+ IN VOID *Buffer,
+ IN UINTN Length
+ )
+{
+ UINT8 *Data;
+ UINTN Index;
+
+ Data = Buffer;
+ for (Index = 0; Index < Length; Index++) {
+ if (Data[Index] != 0xff) {
+ return TRUE;
+ }
+ }
+ return FALSE;
+}
+
/**
Perform flash write operation.
@@ -257,11 +286,13 @@ PerformFlashWrite (
__FUNCTION__, BlockSize, Lba));
NumBytes = BlockSize;
- Status = Fvb->Write (Fvb, Lba, 0, &NumBytes, Buffer);
- if (EFI_ERROR (Status)) {
- DEBUG ((DEBUG_ERROR,
- "%a: write of LBA 0x%lx failed - %r (NumBytes == 0x%lx)\n",
- __FUNCTION__, Lba, Status, NumBytes));
+ if (BufferHasData (Buffer, NumBytes)) {
+ Status = Fvb->Write (Fvb, Lba, 0, &NumBytes, Buffer);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR,
+ "%a: write of LBA 0x%lx failed - %r (NumBytes == 0x%lx)\n",
+ __FUNCTION__, Lba, Status, NumBytes));
+ }
}
if (HaveBootGraphics) {
Before adding more payload to the capsule which may be only partially occupied, add some logic to skip writing these blocks after erasing them. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> --- Silicon/Socionext/SynQuacer/Library/SynQuacerPlatformFlashAccessLib/SynQuacerPlatformFlashAccessLib.c | 41 +++++++++++++++++--- 1 file changed, 36 insertions(+), 5 deletions(-) -- 2.15.1 _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel