Tejun Heo wrote:
This will be used by later patches.
Signed-off-by: Tejun Heo <htejun@xxxxxxxxx>
---
drivers/scsi/sata_sil24.c | 34 +++++++++++++++++++++++-----------
1 files changed, 23 insertions(+), 11 deletions(-)
dbf21a7fbc3fe926671416fecebfea70aef78c8a
diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c
index 86233ac..0941f74 100644
--- a/drivers/scsi/sata_sil24.c
+++ b/drivers/scsi/sata_sil24.c
@@ -431,6 +431,24 @@ static void sil24_tf_read(struct ata_por
*tf = pp->tf;
}
+static int sil24_poll_register(void __iomem *reg, u32 mask, u32 val,
+ unsigned long interval_msec,
+ unsigned long timeout_msec)
+{
+ unsigned long timeout;
+ u32 tmp;
+
+ timeout = jiffies + (timeout_msec * HZ) / 1000;
+ do {
+ tmp = readl(reg);
+ if ((tmp & mask) == val)
+ return 0;
+ msleep(interval_msec);
+ } while (time_before(jiffies, timeout));
+
Let's not duplicate code in AHCI. Initially the common code could live
in libata, but let's think about the best place in the kernel for this
function to live.
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