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| author | Dave Jones <davej@redhat.com> | 2005-09-23 15:59:37 -0700 |
|---|---|---|
| committer | Dave Jones <davej@redhat.com> | 2005-09-23 15:59:37 -0700 |
| commit | 0ff541dafdcb9bc8933e7e4881e5924a408b5335 (patch) | |
| tree | 8467dffd0c09b5a32085b72a4a348af5adafa62d /drivers/char | |
| parent | 32a3658533c6f4c6bf370dd730213e802464ef9b (diff) | |
| download | blackbird-op-linux-0ff541dafdcb9bc8933e7e4881e5924a408b5335.tar.gz blackbird-op-linux-0ff541dafdcb9bc8933e7e4881e5924a408b5335.zip | |
[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>
Diffstat (limited to 'drivers/char')
| -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) |
