diff options
| author | Jens Axboe <jaxboe@fusionio.com> | 2011-05-20 20:33:15 +0200 |
|---|---|---|
| committer | Jens Axboe <jaxboe@fusionio.com> | 2011-05-20 20:33:15 +0200 |
| commit | 698567f3fa790fea37509a54dea855302dd88331 (patch) | |
| tree | 7a1df976a0eb12cab03e82c18809a30d5482fee4 /drivers/s390/cio/qdio_main.c | |
| parent | d70d0711edd8076ec2ce0ed109106e2df950681b (diff) | |
| parent | 61c4f2c81c61f73549928dfd9f3e8f26aa36a8cf (diff) | |
Merge commit 'v2.6.39' into for-2.6.40/core
Since for-2.6.40/core was forked off the 2.6.39 devel tree, we've
had churn in the core area that makes it difficult to handle
patches for eg cfq or blk-throttle. Instead of requiring that they
be based in older versions with bugs that have been fixed later
in the rc cycle, merge in 2.6.39 final.
Also fixes up conflicts in the below files.
Conflicts:
drivers/block/paride/pcd.c
drivers/cdrom/viocd.c
drivers/ide/ide-cd.c
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'drivers/s390/cio/qdio_main.c')
| -rw-r--r-- | drivers/s390/cio/qdio_main.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c index c532ba929ccd..e8f267eb8887 100644 --- a/drivers/s390/cio/qdio_main.c +++ b/drivers/s390/cio/qdio_main.c @@ -407,8 +407,11 @@ static inline void account_sbals(struct qdio_q *q, int count) q->q_stats.nr_sbals[pos]++; } -static void announce_buffer_error(struct qdio_q *q, int count) +static void process_buffer_error(struct qdio_q *q, int count) { + unsigned char state = (q->is_input_q) ? SLSB_P_INPUT_NOT_INIT : + SLSB_P_OUTPUT_NOT_INIT; + q->qdio_error |= QDIO_ERROR_SLSB_STATE; /* special handling for no target buffer empty */ @@ -426,6 +429,12 @@ static void announce_buffer_error(struct qdio_q *q, int count) DBF_ERROR("F14:%2x F15:%2x", q->sbal[q->first_to_check]->element[14].flags & 0xff, q->sbal[q->first_to_check]->element[15].flags & 0xff); + + /* + * Interrupts may be avoided as long as the error is present + * so change the buffer state immediately to avoid starvation. + */ + set_buf_states(q, q->first_to_check, state, count); } static inline void inbound_primed(struct qdio_q *q, int count) @@ -506,8 +515,7 @@ static int get_inbound_buffer_frontier(struct qdio_q *q) account_sbals(q, count); break; case SLSB_P_INPUT_ERROR: - announce_buffer_error(q, count); - /* process the buffer, the upper layer will take care of it */ + process_buffer_error(q, count); q->first_to_check = add_buf(q->first_to_check, count); atomic_sub(count, &q->nr_buf_used); if (q->irq_ptr->perf_stat_enabled) @@ -677,8 +685,7 @@ static int get_outbound_buffer_frontier(struct qdio_q *q) account_sbals(q, count); break; case SLSB_P_OUTPUT_ERROR: - announce_buffer_error(q, count); - /* process the buffer, the upper layer will take care of it */ + process_buffer_error(q, count); q->first_to_check = add_buf(q->first_to_check, count); atomic_sub(count, &q->nr_buf_used); if (q->irq_ptr->perf_stat_enabled) |