diff options
| author | Dave Jones <davej@redhat.com> | 2005-11-07 14:02:58 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2005-12-14 15:42:58 -0800 |
| commit | 73db2c2525cf8888e229189480e295817680df85 (patch) | |
| tree | 820eadbfb69b90228e55d83ece1bf7b44ff0205f | |
| parent | 28e52c66f8fa3d112036b5539d80eaf90a9693b6 (diff) | |
[PATCH] AGPGART: Fix serverworks TLB flush.
[AGPGART] Fix serverworks TLB flush.
Go back to what 2.4 kernels used to do here, as if this hits,
the kernel just hangs indefinitly.
Actually an improvement over 2.4 - we now break; out of the loop
instead of just printing messages on timeouts.
Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/char/agp/sworks-agp.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/drivers/char/agp/sworks-agp.c b/drivers/char/agp/sworks-agp.c index a9fb12c20eb7..53968973f890 100644 --- a/drivers/char/agp/sworks-agp.c +++ b/drivers/char/agp/sworks-agp.c @@ -242,13 +242,27 @@ static int serverworks_fetch_size(void) */ static void serverworks_tlbflush(struct agp_memory *temp) { + unsigned long timeout; + writeb(1, serverworks_private.registers+SVWRKS_POSTFLUSH); - while (readb(serverworks_private.registers+SVWRKS_POSTFLUSH) == 1) + timeout = jiffies + 3*HZ; + while (readb(serverworks_private.registers+SVWRKS_POSTFLUSH) == 1) { cpu_relax(); + if (time_after(jiffies, timeout)) { + printk(KERN_ERR PFX "TLB post flush took more than 3 seconds\n"); + break; + } + } writel(1, serverworks_private.registers+SVWRKS_DIRFLUSH); - while(readl(serverworks_private.registers+SVWRKS_DIRFLUSH) == 1) + timeout = jiffies + 3*HZ; + while (readl(serverworks_private.registers+SVWRKS_DIRFLUSH) == 1) { cpu_relax(); + if (time_after(jiffies, timeout)) { + printk(KERN_ERR PFX "TLB Dir flush took more than 3 seconds\n"); + break; + } + } } static int serverworks_configure(void) |