s390/qdio: clarify reporting of errors to the drivers

Now that all drivers use qdio_inspect_queue() and qdio's internal
queue tasklets are gone, the driver-specified queue handlers are
only called for async error reporting (eg. for an error condition in
the QEBSM code).

So take a moment to clean up the Output Queue handlers (they are
_always_ called with qdio_error != 0), and clarify which error types
can be reported through what interface. As Benjamin already suggested
a while ago, we should turn these into distinct enums at some point.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

diff --git a/arch/s390/include/asm/qdio.h b/arch/s390/include/asm/qdio.h
index 334cf9a..cb26bf8 100644 (file)
--- a/arch/s390/include/asm/qdio.h
+++ b/arch/s390/include/asm/qdio.h
@@ -291,16 +291,15 @@ struct qdio_ssqd_desc {
 typedef void qdio_handler_t(struct ccw_device *, unsigned int, int,
                            int, int, unsigned long);
 
-/* qdio errors reported to the upper-layer program */
+/* qdio errors reported through the queue handlers: */
 #define QDIO_ERROR_ACTIVATE                    0x0001
 #define QDIO_ERROR_GET_BUF_STATE               0x0002
 #define QDIO_ERROR_SET_BUF_STATE               0x0004
+
+/* extra info for completed SBALs: */
 #define QDIO_ERROR_SLSB_STATE                  0x0100
 #define QDIO_ERROR_SLSB_PENDING                        0x0200
 
-#define QDIO_ERROR_FATAL                       0x00ff
-#define QDIO_ERROR_TEMPORARY                   0xff00
-
 /* for qdio_cleanup */
 #define QDIO_FLAG_CLEANUP_USING_CLEAR          0x01
 #define QDIO_FLAG_CLEANUP_USING_HALT           0x02

diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index 62f88cc..f96755a 100644 (file)
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -3804,14 +3804,10 @@ static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
                                     unsigned long card_ptr)
 {
        struct qeth_card *card        = (struct qeth_card *) card_ptr;
-       struct net_device *dev = card->dev;
 
-       QETH_CARD_TEXT(card, 6, "qdouhdl");
-       if (qdio_error & QDIO_ERROR_FATAL) {
-               QETH_CARD_TEXT(card, 2, "achkcond");
-               netif_tx_stop_all_queues(dev);
-               qeth_schedule_recovery(card);
-       }
+       QETH_CARD_TEXT(card, 2, "achkcond");
+       netif_tx_stop_all_queues(card->dev);
+       qeth_schedule_recovery(card);
 }
 
 /**

diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c
index 6671d95..8f19bed 100644 (file)
--- a/drivers/s390/scsi/zfcp_qdio.c
+++ b/drivers/s390/scsi/zfcp_qdio.c
@@ -69,10 +69,7 @@ static void zfcp_qdio_int_req(struct ccw_device *cdev, unsigned int qdio_err,
 {
        struct zfcp_qdio *qdio = (struct zfcp_qdio *) parm;
 
-       if (unlikely(qdio_err)) {
-               zfcp_qdio_handler_error(qdio, "qdireq1", qdio_err);
-               return;
-       }
+       zfcp_qdio_handler_error(qdio, "qdireq1", qdio_err);
 }
 
 static void zfcp_qdio_request_tasklet(struct tasklet_struct *tasklet)