diff options
| author | Julian Wiedmann <jwi@linux.ibm.com> | 2021-01-30 13:04:53 +0100 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2021-02-13 17:17:55 +0100 |
| commit | 7940eaf2e956ce3d67ac9efb5b621adbb823e049 (patch) | |
| tree | 485f4f8d392a869d54a22e4628d3c6acf4c48082 /arch/s390 | |
| parent | 540936df443859244e1a76331524600c35b225d0 (diff) | |
s390/qdio: improve handling of PENDING buffers for QEBSM devices
For QEBSM devices the 'merge_pending' mechanism in get_buf_states()
doesn't apply, and we can actually get SLSB_P_OUTPUT_PENDING returned.
So for this case propagating the PENDING state to the driver via the
queue's sbal_state doesn't make sense and creates unnecessary overhead.
Instead introduce a new QDIO_ERROR_* flag that gets passed to the
driver, and triggers the same processing as if the buffers were flagged
as QDIO_OUTBUF_STATE_FLAG_PENDING.
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/qdio.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/include/asm/qdio.h b/arch/s390/include/asm/qdio.h index f96454f5d4cd..c85f75a3d452 100644 --- a/arch/s390/include/asm/qdio.h +++ b/arch/s390/include/asm/qdio.h @@ -315,6 +315,7 @@ typedef void qdio_handler_t(struct ccw_device *, unsigned int, int, #define QDIO_ERROR_GET_BUF_STATE 0x0002 #define QDIO_ERROR_SET_BUF_STATE 0x0004 #define QDIO_ERROR_SLSB_STATE 0x0100 +#define QDIO_ERROR_SLSB_PENDING 0x0200 #define QDIO_ERROR_FATAL 0x00ff #define QDIO_ERROR_TEMPORARY 0xff00 |