[lkml]   [2007]   [Apr]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: 2.6.21-rc7-mm1 BUG at kernel/sched-clock.c:175 init_sched_clock()
>  static void ahci_freeze(struct ata_port *ap)
> {
> + void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
> void __iomem *port_mmio = ahci_port_base(ap);
> /* turn IRQ off */
> writel(0, port_mmio + PORT_IRQ_MASK);
> +
> + /* clear IRQ pending bit */
> + writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);

Neither of those two are going to help in all cases. They are PCI writes
to mmio so they are posted. You don't know they hit the device until a
read cycle coming back has completed, so you need to read something after
doing this to be sure.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2007-04-25 12:21    [W:0.102 / U:5.080 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site