sanchayanmaity/minix
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity

Fix another bug related to trying i/o more than once

Browse source
This commit is contained in:
Ben Gras 2006-06-28 12:20:30 +00:00
parent 46646a49a8
commit bfca7d68ba
1 changed files with 5 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
servers/fs/device.c
View file

@ -177,6 +177,7 @@ off_t *pos;
int access = 0, size;
int j;
iovec_t *v;
static iovec_t new_iovec[NR_IOREQS];
/* Number of grants allocated in vector I/O. */
*vec_grants = 0;
@ -204,9 +205,9 @@ off_t *pos;
/* Change to safe op. */
*op = *op == DEV_GATHER ? DEV_GATHER_S : DEV_SCATTER_S;
/* Grant access to i/o vector. */
/* Grant access to my new i/o vector. */
if((*gid = cpf_grant_direct(driver, (vir_bytes)
buf, bytes * sizeof(iovec_t),
new_iovec, bytes * sizeof(iovec_t),
CPF_READ | CPF_WRITE)) < 0) {
panic(__FILE__,
"cpf_grant_direct of vector failed", NO_NUM);
@ -214,7 +215,7 @@ off_t *pos;
v = (iovec_t *) buf;
/* Grant access to i/o buffers. */
for(j = 0; j < bytes; j++) {
gids[j] = v[j].iov_addr =
new_iovec[j].iov_addr = gids[j] =
cpf_grant_direct(driver, (vir_bytes)
v[j].iov_addr, v[j].iov_size,
*op == DEV_GATHER_S ? CPF_WRITE : CPF_READ);
@ -222,6 +223,7 @@ off_t *pos;
panic(__FILE__, "grant to iovec buf failed",
NO_NUM);
}
new_iovec[j].iov_size = v[j].iov_size;
(*vec_grants)++;
}
break;