Hello. On 06-01-2013 6:48, Aaron Lu wrote:
For ODDs, the upper layer will poll for media change every a few seconds, which will make it enter and leave suspend state very oftern. And as each suspend will also cause a hard/soft reset,
s/oftern/often/
the gain of runtime suspend is very little while the ODD may mis-function after constantly being reset. So the idle callback here will not proceed to suspend if a non-ZPODD capable ODD is attached to the port.
Signed-off-by: Aaron Lu <aaron.lu@xxxxxxxxx> --- drivers/ata/libata-core.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 65a362e..f664a90 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -5408,8 +5408,27 @@ static int ata_port_resume(struct device *dev) return rc; } +/* + * For ODDs, the upper layer will poll for media change every a few seconds, + * which will make it enter and leave suspend state every a few seconds. And
Article is not needed before "few". (Same comment to the changelog.)
+ * as each suspend will cause a hard/soft reset, the gain of runtime suspend + * is very little and the ODD may mis-function after constantly being reset.
s/mis-function/malfunction/ perhaps? (Same in the changelog.) MBR, Sergei -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
