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Read ROM in chunks

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This patch speeds up reads of the ROM by reading in large chunks rather
than one byte at a time. This patch was by Dann Frazier.
This commit is contained in:
David Nusinow
2007-05-28 21:42:10 -04:00
parent 6fdd134a0c
commit 6bf8d50193
1 changed files with 3 additions and 1 deletions
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4
hw/xfree86/os-support/bus/linuxPci.c
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@@ -788,8 +788,10 @@ xf86ReadDomainMemory(PCITAG Tag, ADDRESS Base, int Len, unsigned char *Buf)
write(fd, "1", 2);
lseek(fd, 0, SEEK_SET);
len = min(Len, st.st_size);
/* copy the ROM until we hit Len, EOF or read error */
for (i = 0; i < Len && read(fd, Buf, 1) > 0; Buf++, i++)
for (; len && (size = read(fd, Buf, len)) > 0 ; Buf+=size, len-=size)
;
write(fd, "0", 2);