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SubjectRe: [PATCH V3] AHCI: Workaround for ThunderX Errata#22536
On Tue, 16 Feb 2016, tchalamarla@caviumnetworks.com wrote:
> +#ifdef CONFIG_ARM64
> +/* Due to ERRATA#22536, ThunderX need to handle
> + * HOST_IRQ_STAT differently.
> + * Work around is to make sure all pending IRQs
> + * are served before leaving handler
> + */
> +static irqreturn_t ahci_thunderx_irq_handler(int irq, void *dev_instance)
> +{
> + struct ata_host *host = dev_instance;
> + struct ahci_host_priv *hpriv;
> + unsigned int rc = 0;
> + void __iomem *mmio;
> + u32 irq_stat, irq_masked;
> + unsigned int handled = 1;
> +
> + VPRINTK("ENTER\n");

Come on. This VPRINK stuff is really pointless. Enable irq tracepoints, they
already track the enter/exit of interrupt handlers ....

Thanks,

tglx


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