sanchayanmaity/xv6-cs450
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity

formatting, sleep bug fix

Browse source
This commit is contained in:
rsc 2007-08-14 18:46:29 +00:00
parent f1f8dd91bc
commit 8d0a83565a
1 changed files with 7 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
ide.c
View file

@ -29,6 +29,7 @@ struct ide_request {
void *addr;
uint nsecs;
uint read;
int done;
};
static struct ide_request request[NREQUEST];
@ -40,6 +41,7 @@ static int disk_queue;
static int ide_probe_disk1(void);
//PAGEBREAK: 10
// Wait for IDE disk to become ready.
static int
ide_wait_ready(int check_error)
@ -91,6 +93,7 @@ void
ide_intr(void)
{
acquire(&ide_lock);
request[tail].done = 1;
wakeup(&request[tail]);
release(&ide_lock);
}
@ -119,6 +122,7 @@ ide_start_request (void)
}
}
//PAGEBREAK: 30
// Run an entire disk operation.
void
ide_rw(int diskno, uint secno, void *addr, uint nsecs, int read)
@ -140,13 +144,15 @@ ide_rw(int diskno, uint secno, void *addr, uint nsecs, int read)
r->nsecs = nsecs;
r->diskno = diskno;
r->read = read;
r->done = 0;
head = (head + 1) % NREQUEST;
// Start request if necessary.
ide_start_request();
// Wait for request to finish.
sleep(r, &ide_lock);
while(!r->done)
sleep(r, &ide_lock);
// Finish request.
if(read){